US20060248194A1 - Connection forwarding - Google Patents

Connection forwarding Download PDF

Info

Publication number
US20060248194A1
US20060248194A1 US11/377,906 US37790606A US2006248194A1 US 20060248194 A1 US20060248194 A1 US 20060248194A1 US 37790606 A US37790606 A US 37790606A US 2006248194 A1 US2006248194 A1 US 2006248194A1
Authority
US
United States
Prior art keywords
proxy
network
message
client
adapted
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US11/377,906
Inventor
Kand Ly
Joshua Tseng
Steve McCanne
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Riverbed Technology Inc
Original Assignee
Riverbed Technology Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to US66336605P priority Critical
Application filed by Riverbed Technology Inc filed Critical Riverbed Technology Inc
Priority to US11/377,906 priority patent/US20060248194A1/en
Assigned to RIVERBED TECHNOLOGY, INC. reassignment RIVERBED TECHNOLOGY, INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: LY, KAND, MCCANNE, STEVEN, TSENG, JOSHUA
Publication of US20060248194A1 publication Critical patent/US20060248194A1/en
Assigned to MORGAN STANLEY & CO. LLC reassignment MORGAN STANLEY & CO. LLC SECURITY AGREEMENT Assignors: OPNET TECHNOLOGIES, INC., RIVERBED TECHNOLOGY, INC.
Priority claimed from US13/867,499 external-priority patent/US9332091B2/en
Assigned to RIVERBED TECHNOLOGY, INC. reassignment RIVERBED TECHNOLOGY, INC. RELEASE OF PATENT SECURITY INTEREST Assignors: MORGAN STANLEY & CO. LLC, AS COLLATERAL AGENT
Application status is Abandoned legal-status Critical

Links

Images

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00Network-specific arrangements or communication protocols supporting networked applications
    • H04L67/14Network-specific arrangements or communication protocols supporting networked applications for session management
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00Network-specific arrangements or communication protocols supporting networked applications
    • H04L67/28Network-specific arrangements or communication protocols supporting networked applications for the provision of proxy services, e.g. intermediate processing or storage in the network
    • H04L67/2814Network-specific arrangements or communication protocols supporting networked applications for the provision of proxy services, e.g. intermediate processing or storage in the network for data redirection
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00Network-specific arrangements or communication protocols supporting networked applications
    • H04L67/28Network-specific arrangements or communication protocols supporting networked applications for the provision of proxy services, e.g. intermediate processing or storage in the network
    • H04L67/2866Architectural aspects
    • H04L67/2876Pairs of interprocessing entities at each side of the network, e.g. split proxies

Abstract

Two or more network traffic processors connected with the same LAN and WAN are identified as neighbors. Neighboring network traffic processors cooperate to overcome asymmetric routing, thereby ensuring that related sequences of network traffic are processed by the same network proxy. A network proxy can be included in a network traffic processor or as a standalone unit. A network traffic processor that intercepts a new connection initiation by a client assigns a network proxy to handle all messages associated with that connection. The network traffic processor conveys connection information to neighboring network traffic processors. The neighboring network traffic processors use the connection information to redirect network traffic associated with the connection to the assigned network proxy, thereby overcoming the effects of asymmetric routing. The assigned network proxy handles redirected network traffic in much the same way that it would handle network traffic received directly.

Description

    CROSS-REFERENCES TO RELATED APPLICATIONS
  • This application claims priority to U.S. Provisional Patent Application No. 60/663,366, filed Mar. 18, 2005 of which is incorporated by reference herein for all purposes. This application is related to U.S. patent application Ser. No. 10/285,315, filed 30 Oct. 2002, entitled “Transaction Accelerator for Client-Server Communication Systems,” hereafter referred to as “McCanne I”; and U.S. patent application Ser. No. 10/640,562, filed 12 Aug. 2003, entitled “Cooperative Proxy Auto-Discovery and Connection Interception,” hereafter referred to as “McCanne IV,” each of which are incorporated by reference herein for all purposes.
  • BACKGROUND OF THE INVENTION
  • The present invention relates to field of data networks and specifically to systems and methods of improving network performance. Network proxies and other types of network devices can be used to cache or store network data, accelerate network traffic, or otherwise control or affect network traffic between clients and servers.
  • As used herein, “client” generally refers to a computer, computing device, peripheral, electronics, or the like, that makes a request for data or an action, while “server” generally refers to a computer, computing device, peripheral, electronics, or the like, that operates in response to requests for data or action made by one or more clients. A computer or other device may be considered a client, a server, or both depending upon the context of its behavior.
  • As used herein, a request can be for operation of the computer, computing device, peripheral, electronics, or the like, and/or for an application being executed or controlled by the client. One example is a computer running a word processing program that needs a document stored externally to the computer and uses a network file system client to make a request over a network to a file server. Another example is a request for an action directed at a server that itself performs the action, such as a print server, a processing server, a database server, a control server, and equipment interface server, an I/O (input/output) server, etc.
  • A request is often satisfied by a response message supplying the data requested or performing the action requested, or a response message indicating an inability to service the request, such as an error message or an alert to a monitoring system of a failed or improper request. A server might also block a request, forward a request, transform a request, or the like, and then respond to the request or not respond to the request. Generally, a request-response cycle can be referred to as a “transaction” and for a given transaction, some object (physical, logical and/or virtual) can be said to be the “client” for that transaction and some other object (physical, logical and/or virtual) can be said to be the “server” for that transaction.
  • A client issues request messages to a server, which typically delivers a response message to each request message back to the client. As described in McCanne I and McCanne IV, a network proxy communicating with one or more peer network proxies can provide transaction acceleration, traffic reduction, and other functions over a wide area network interposed between two local area networks (LANs). Typically, in such a configuration, a client's request is intercepted by a client-side network proxy, which is connected with the client via a client LAN, and delivered via the WAN to a server-side network proxy. The server-side network proxy delivers the client request message to the server via a server LAN. The request message may be transformed or processed by the two proxies so that the request message (and possibly future request messages) are more effectively transported across the intervening network than would be true without the use of the cooperating network proxies. A message generally can be structured in any format or data structure suitable for conveying information over a communications network, including a single network packet or multiple network packets.
  • In these proxy-based systems, packets sent from the client are received at the client-side proxy; packets from the client-side proxy are received at the server-side proxy; and packets from the server-side proxy are received at the server. In many networks, these arrangements from client to server are sufficient to ensure the reverse direction of communication from server to client as well, viz. that packets from the server are received at the server-side proxy, packets from the server-side proxy are received at the client-side proxy, and packets from the client-side proxy are received at the client.
  • However, in some network environments this reverse direction of communication is more problematic. In particular, a LAN including a client or server can have multiple redundant connections with the WAN. As a result, asymmetric routing can produce situations in which a response packet from server to client may traverse a different path than the path used by a request packet from client to server. Where the proxies can rearrange the communication between client and server without the knowledge or participation of the client or server, reverse traffic that bypasses the proxies and their hidden cooperative arrangements can cause performance degradation or a total failure of the proxied connection between client and server. This problem with network proxies and asymmetric routing is mentioned in “Transparent Proxy Signalling,” Knutsson, Bjorn and Peterson, Larry, Journal of Communications Networks, March 2001; however, no solution to this problem is proposed.
  • It is therefore desirable for a system and method to override the effects described here. It is further desirable for the system and method to redirect related sequences of network traffic through the appropriate WAN or other network connection. It is additionally desirable for the system and method to remain transparent to clients and servers while redirecting network traffic through the appropriate WAN or other network connection.
  • BRIEF SUMMARY OF THE INVENTION
  • In an embodiment of the invention, two or more network proxies connected with the same LAN and WAN are identified as neighbors, for example by including explicit configuration of network proxies or by an inference of a neighbor relationship from other information available. Network proxies that are neighbors cooperate to overcome the effects of asymmetric routing and other effects by forwarding packets to each other as necessary, such as to ensure that related sequences of network traffic are processed by the same network proxies.
  • In an embodiment, the proxy in a neighbor group that intercepts a new connection initiation by a client, for example by receiving a SYN packet, is considered the “owning proxy” of that connection. Upon receiving a new connection initiation by a client, the owning proxy first conveys to all of its neighboring proxies identifying information about the new connection, then opens its inner connection across the WAN to a counterpart network proxy to further communicate the new connection initiation of the client. In some cases, the information is not conveyed to all neighboring proxies, but to some of them. In such cases, it might help to simply consider that the uninformed neighboring proxies are not in fact neighbors even though they might qualify to be neighbors.
  • In an embodiment, the other proxies in the neighbor group use the identifying information they have received from the owning proxy to handle packets that might otherwise bypass the owning proxy due to asymmetric routing or other network behaviors. A neighbor proxy that receives a packet matching the identifying information might alter the addressing information of the packet so that it is received by the owning proxy. The owning proxy then can be expected to handle the packet in much the same way that it would handle a packet that it had received directly.
  • In an embodiment, a neighbor relationship can be explicitly ended by the owning proxy or the neighbor proxy. When a neighbor relationship is ended, the neighbor proxies discard the identifying information. In another embodiment, a neighbor proxy can use the identifying information to query the owning proxy for the status of the corresponding connection. The neighbor proxy discards that information if the owning proxy indicates that the connection has closed, or if the owning proxy does not recognize the connection, or if the owning proxy fails to respond.
  • BRIEF DESCRIPTION OF THE DRAWINGS
  • The invention will be described with reference to the drawings, in which:
  • FIG. 1 illustrates an example network and potential problems caused by asymmetric routing.
  • FIG. 2 illustrates example networks and improved network traffic flow according to embodiments of the invention.
  • FIG. 3 illustrates an example of the information maintained by a neighboring network connection according to an embodiment of the invention.
  • FIG. 4 illustrates a method of initiating a new connection according to an embodiment of the invention.
  • FIG. 5 illustrates a method of processing network traffic associated with a connection according to an embodiment of the invention.
  • In the drawings, the use of identical reference numbers indicates similar components.
  • DETAILED DESCRIPTION OF THE INVENTION
  • FIG. 1 illustrates an example network 100 and potential problems caused by asymmetric routing. FIG. 1 shows communication between client 110 and server 150 across a wide-area network (WAN) 130, where the communication is mediated by two proxies, a client-side proxy 120 and a server-side proxy 140. In this example network configuration, a message 115 sent by client 110 and addressed to server 150 is intercepted by client-side proxy 120. Client-side proxy 120 sends message 135 to server-side proxy 140.
  • In some applications, message 135 is identical to message 115. In other applications, for example if client-side proxy 120 includes network acceleration or caching functions, client-side proxy 120 transforms message 115 into an equivalent message 135 that may differ from message 115 in many ways, including size, encoding, framing, addressing, or other aspects. The server-side proxy 140 receives message 135 and transforms it into message 145, which is identical to, or an acceptable substitute for, original message 115. As network 100 is configured, the two proxies 120 and 140 are invisible in their effect: client 110 and server 150 send and receive messages that are identical to, or an acceptable substitute for, what would occur if message 115 were simply sent directly to server 150 from client 110.
  • A similar process applies to messages sent in the reverse direction: message 155 is addressed to client 110 but is intercepted by server-side proxy 140. Server-side proxy 140 sends message 165 to client-side proxy 120. In some applications, message 165 is a transformation of message 155. Message 165 may differ from message 155 in many ways, including size, encoding, framing, addressing, or other aspects. The transformation that produces message 165 from message 155 may be entirely different from the transformation that produced message 135 from message 115. When received by client-side proxy 120, message 165 is transformed into message 175, which is identical to, or an acceptable substitute for, original message 155. Some improvements that such interceptions can provide are shown in McCanne I.
  • In some applications, client-side proxy 120 and server-side proxy 140 form an association with the first passage of messages from client 110 to server 150 via client-side proxy 120 and server-side proxy 140. Information about that association is used to arrange a similar transformation for messages sent in the reverse direction.
  • Asymmetrical routing occurs when an initial message and a subsequent message between the client 100 and the server 150 pass through one or more different network proxies or other LAN to WAN connections. This can occur if there are redundant links between WAN 130 and server 150 or client 110. One or more redundant links are commonly used for load balancing and improved reliability. As shown in FIG. 1, server 150 is connected with WAN 130 via server-side proxy 140 and an additional server-side proxy 141.
  • In the example shown, if conventional network routing schemes are employed, there is no guarantee that messages from server 150 to client 110 will traverse the identical link that was traversed by messages from client 110 to server 150, resulting in so-called asymmetric routing. For example, an initial communication between client 110 and server 150, using messages 115, 135, and 145, passes through server-side proxy 140 to reach server 150, but the response might not.
  • For example, a return communication of message 156 may be intercepted by a different server-side proxy 141. Server-side proxy 141 does not know about client-side proxy 120 or the association between client-side proxy 120 and server-side proxy 140. As a result, the server-side proxy 141 treats message 156 as it would any other message that it received without additional information, e.g., passing it through unaltered as message 166. Message 166 then crosses the WAN 130 on its way to client 110. In some arrangements, message 166 a is received directly by client 110, since it is addressed to client 110; in other arrangements, client-side proxy 120 intercepts all traffic to client 110, but will pass message 166 b through unaltered to client 110 as message 176. In either case, the message 156 originally sent from server 150 to client 110 does not benefit from the association of client-side proxy 120 and server-side proxy 140.
  • Such “one-sided” or “half-way” communication means that only one direction of traffic can benefit from the transformations performed by proxies 120, 140, and 141. In some cases, such communication patterns may violate rules for communication between client 110 and 150, leading to communication breakdown. A similar problem occurs when there is no second server-side proxy 141 or when no server-side proxy 140, 141 receives message 156, so that it is simply sent unchanged from server 150 to client 110.
  • FIG. 2 illustrates example networks having improved network traffic flow according to embodiments of the invention. FIG. 2A illustrates a network 200 similar to network 100 described above. In an embodiment of the invention, server-side proxies 240 and 241 of network 200 have been configured as neighbors, so each can communicate with the other and/or has some awareness of the other.
  • A message 215 sent by client 210 and addressed to server 250 is intercepted by client-side proxy 220. The client-side proxy 220 sends message 235 to a server-side proxy 240. Message 235 may be identical to message 215 or a transformation of message 215 that differs in ways including size, encoding, framing, addressing, and/or other aspects.
  • When message 235 is received by server-side proxy 240, an additional step takes place if message 235 is the establishment of a new client/server connection: in such a case, server-side proxy 240 provides new-connection information 248 derived from message 235 to neighbor server-side proxy 241. Neighbor server-side proxy 241 stores that new-connection information 248 and associates it with owning server-side proxy 240.
  • Server-side proxy 240 also transforms message 235 into message 245, which is identical to, or an acceptable substitute for, original message 215. Thus, the two proxies 220 and 240 are invisible in their effect: client 210 and server 250 send and receive messages that are identical to, or an acceptable substitute for, what would occur if message 215 were simply sent directly to server 250. For example, network traffic communicated from server-side proxy 240 to server 250 might have the source address of client 210.
  • For communications between the server 250 and the client 210, neighbor server-side proxy 241 may receive message 246 addressed to client 210 from server 250. Upon receiving communications, such as message 246 from the server 250, neighbor server-side proxy 241 uses its stored new-connection information 248 to determine that message 246 belongs to a connection made through server-side proxy 240. Of course, server-side proxy 240 can receive the message and handle it directly. Such message flows are not shown in FIG. 2A, but might be expected to proceed as shown in FIG. 1.
  • In response to this determination, server-side proxy 241 forwards message 247 to server-side proxy 240, in effect “forwarding” the connection to its handling proxy. Server-side proxy 240 then processes message 247. Using information about its association with client-side proxy 220, server-side proxy 240 transforms message 247 into message 244, which is in turn sent across WAN 230. Client-side proxy 220 then transforms message 244 into message 249, where message 249 is identical to, or an acceptable substitute for, original message 246.
  • Messages can be forwarded between neighboring network proxies in a number of different ways. In an embodiment, a forwarding server-side proxy changes the destination address of a message to the address of another neighboring server-side proxy. In one implementation of this embodiment, the forwarding proxy does not change the source address of the forwarded message to match its own address and instead retains the source address of the message, for example the server 250. The proxy receiving the forwarded message maintains a connection state internally corresponding to a connection between itself and the original source of the message. Thus, to the proxy receiving the forwarded message from a neighboring proxy, the forwarded message appears to have been received from the original source of the message, rather than from the neighboring proxy.
  • In another embodiment, a message is forwarded from proxy 241 to a neighboring proxy by encapsulating the entire message in another message, for example in a generic routing encapsulation (“GRE”) tunnel established between neighboring proxies. In still another embodiment, a message is forwarded from a forwarding proxy to a neighboring proxy by extracting payload and destination information from original message and sending the payload in a suitable data structure across a TCP, SCTP, or similar connection between the proxies.
  • In general, messages can be forwarded between neighboring network proxies at the level of detection and forwarding of one or more network packets comprising each message, at the higher-level of semantic request and response messages, or at any intermediate level of processing.
  • FIG. 2B illustrates an example network 255 according to an embodiment of the invention. Network 255 is similar to network 200, except that there are two client-side network proxies. In this example, client-side proxies 290 and 291 of network 255 have been configured as neighbors, so each can communicate with the other and/or has some awareness of the other.
  • A message 265 sent by client 260 and addressed to server 275 is intercepted by client-side proxy 290. Client-side proxy 290 sends a message 285 to server-side proxy 270. Message 285 may be identical to message 265 or a transformation of message 265 that differs in ways including size, encoding, framing, addressing, and/or other aspects.
  • When message 265 is received by client-side proxy 290, an additional step takes place if message 265 is the establishment of a new client/server connection. In such a case, client-side proxy 290 provides new-connection information 268 derived from message 265 to neighboring client-side proxy 291. Neighbor client-side proxy 291 stores that new-connection information 268 and associates it with owning client-side proxy 290.
  • Server-side proxy 270 receives message 285 and transforms it into message 287, which is identical to, or an acceptable substitute for original message 265. Thus the two proxies 290 and 270 are invisible in their effect: client 260 and server 275 send and receive messages that are identical to, or an acceptable substitute for what would occur if message 265 were simply sent directly to server 275. For example, network traffic communicated from server-side proxy 270 to server 275 might have the source address of client 260.
  • For communications between the server 275 and the client 260, the neighbor client-side proxy 291 may receive messages from the server 275. For example, server 275 can send message 277 directed to client 260 and server-side proxy 270 can intercept message 277 and can transform it into message 288, which can be identical to message 277 or a transformation of message 277 that differs in ways including size, encoding, framing, addressing, and/or other aspects. For example, message 288 can be a compressed version of message 277.
  • Due to the routing characteristics of wide area network 280, message 288 might be received by either client-side proxy 290 or 291. If message 288 is received by client-side proxy 290, which previously established and therefore “owns” the connection between client 260 and server 275, client-side proxy 290 uses information about its association with server-side proxy 270 and other previously stored information to transform message 288 into message 295, which is in turn sent to client 260. Message 295 is identical to, or an acceptable substitute for, original server message 277.
  • Alternatively, if message 288 is received by client-side proxy 291, client-side proxy 291 uses stored new-connection information 268 to determine that message 288 belongs to a connection made through client-side proxy 290. In response to this determination, client-side proxy 291 forwards message 288 to client-side proxy 290 via message 297. Client-side proxy 290 then transforms message 297 into message 295, which is in turn sent to client 260. Message 295 is identical to, or an acceptable substitute for, original server message 277. Various messages, such as forwarding messages, can have a packet-to-packet correspondence with the messages they are transformed from, or not.
  • As with other embodiments, messages can be forwarded between neighboring network proxies in a number of different ways. In an embodiment, a forwarding client-side proxy changes the destination address of a message to the address of another neighboring client-side proxy. In one implementation of this embodiment, the forwarding proxy does not change the source address of the forwarded message to match its own address and instead retains the source address of the message, for example the server 275. The proxy receiving the forwarded message maintains a connection state internally corresponding to a connection between itself and the original source of the message. Thus, to the proxy receiving the forwarded message from a neighboring proxy, the forwarded message appears to have been received from the original source of the message, rather than from the neighboring proxy.
  • In another embodiment, a message is forwarded from proxy 291 to neighboring proxy by encapsulating the entire message in another message, for example in a GRE tunnel established between neighboring proxies. In still another embodiment, a message is forwarded from a forwarding proxy to a neighboring proxy by extracting payload and destination information from original message and sending the payload in a suitable data structure across a TCP, SCTP, or similar connection between the proxies.
  • As discussed above, messages in general can be forwarded between neighboring network proxies at the level of detection and forwarding of one or more network packets comprising each message, at the higher-level of semantic request and response messages, or at any intermediate level of processing.
  • Although FIGS. 2A-2B show the neighbor configuration, new-connection information, and forwarding occurring at either the server-side proxy or client-side proxy, similar techniques may also be applied with both client-side and server-side proxies. Thus it is possible for a client-server exchange of messages to cause new-connection information to be sent to client-side neighbor proxies, then cause new-connection information to be sent to server-side neighbor proxies, then for a message to be forwarded among server-side proxies, and then for a message to be forwarded among client-side proxies. The number of neighbor proxies and the details of the new-connection information may be different on the client-side and on the server-side. In addition, these techniques can be used whether a connection is initiated at the client or the server, as appropriate.
  • In additional embodiments, proxies may be nested. For example, WAN 230 may actually be implemented as an actual WAN bracketed by a different set of client-side proxies and server-side proxies. For such a nested collection of proxies, one pairing of client-side and server-side proxies might have a non-zero number of neighbor proxies on zero, one, or both sides of the WAN; and separately, the other pairing of client-side and server-side proxies might have a non-zero number of neighbor proxies on zero, one, or both sides of the WAN. Such nestings of proxies may extend to arbitrary depth, not only the two levels described here.
  • FIG. 3 illustrates an example 300 of a data structure for conveying the information maintained by a neighboring network connection according to an embodiment of the invention. FIG. 3 shows a portion of the neighbor information maintained by a proxy, based on new-connection messages received. Entries 301 a and 301 b each comprise a target element 310 and an owner element 320. The meaning of each entry is that for any traffic received at this device addressed to the target, that traffic should be forwarded to the corresponding owner. Thus entry 301 a allows a neighbor receiving traffic destined for 10.3.1.10:1921 to instead forward it to the owning proxy at 10.4.0.1:7810. Entry 301 b means that traffic destined for 10.3.5.44:2044 should also be forwarded to the same owning proxy. (Examples herein use RFC 1918 private addresses to avoid any inadvertent reference to an actual network; public addresses can, of course, appear in the data structure.)
  • FIG. 3 is intended only to show the nature of the information stored and its relationship; the actual data structure is likely to include other mechanisms to allowing rapid search, cheap insertion/deletion, accommodating very large collections of information, and reclaiming old or unused entries. In addition, some embodiments will use additional information to distinguish entries, such as source address, source port, protocol number, DSCP code point, or other information readily available from received traffic. Finally, some embodiments will use forms of pattern-matching or partial specification to allow compact representations of large classes of traffic. All such likely adaptations are straightforward for one skilled in the arts. The “neighbor table” partially shown in FIG. 3 can be stored in local memory of a proxy device, memory of a computer executing a software proxy, etc.
  • FIG. 4 illustrates a method 400 of initiating a new connection according to an embodiment of the invention. This method can be performed by one or more components in a network and/or embodied in computer-readable instructions to perform the method. In step 410, a proxy receives a message. In step 420, the proxy determines whether this connection can be optimized. Some connections may not be optimizable because of configuration rules, or there may be no counterpart proxy available in a suitable network location for the client and server. If the connection is not optimizable, in step 440 the proxy passes through the connection without processing it. In other embodiments, method 400 includes steps of processing the messages at the higher-level of semantic request and response messages, or at any intermediate level of processing, rather than at the level of detection and forwarding of one or more network packets comprising each message.
  • If the connection is optimizable, in step 430 the proxy determines if it has neighbors. If so, in step 450 the proxy, referred to here as the “owner proxy,” supplies new-connection information to each of its neighbors. In an embodiment, the new-connection information can be communicated with neighboring proxies using unicast, multicast, or broadcast techniques. Some proxies that would otherwise qualify as neighbors can be treated as non-neighbors, where appropriate.
  • Regardless of whether it has neighbors or not, in step 460 the owner proxy begins applying optimizations or transformations to connection traffic, in cooperation with its counterpart proxy.
  • FIG. 5 illustrates a method of processing network traffic associated with a connection according to an embodiment of the invention that begins with a proxy receiving a message. In step 510, the proxy receives the message. In step 520, the proxy determines whether the message's destination matches one in its neighbor table, such as that diagrammed in FIG. 3. If the message's destination does not match any entry in the neighbor table, the process continues with step 530 wherein the proxy processes the message normally. This can include forwarding the message to its destination and optionally transforming the message for purposes of caching or network acceleration or other operation.
  • Conversely, if in step 520 it is determined that the message does match an entry in the neighbor table, the proxy can rewrite (step 540) and forward (step 550) the message or an equivalent thereof to the appropriate neighbor network proxy for processing. Forwarding can be accomplished using a variety of different techniques, including the address swapping, tunneling, and payload extraction techniques discussed above. As described previously, embodiments of method 500 can include processing the messages comprising one or more packets at the higher-level of semantic request and response messages, at any intermediate level of processing, or at the level of detection and forwarding of the one or more network packets comprising each message. A message can be part of a packet, comprise one packet per message, or comprise a plurality of packets, depending on context.
  • In a further embodiment, network proxies can be dynamically added. In one implementation, newly added proxies receive and process all network traffic normally, as if their neighbor tables were empty. As a result, some types of network transactions will be disrupted due to the effects of asymmetric routing and other network effects, such as those described previously. Clients and servers will recover from the disrupted network transactions by initiating a new network connection. The new network connection will be intercepted by the network proxies and result in new connection information being forwarded to a newly added proxy, thereby updating its neighbor table.
  • FIG. 6 illustrates an additional network 600 according to an embodiment of the invention. Network 600 is shown including a set of server-side proxies 605, 610, and 615. Other network elements might exist that are not shown. As with the other embodiments, each of the set of server-side proxies can be associated with one or more client-side proxies, which are omitted from FIG. 6 for clarity. The association between client-side and server-side proxies enables transformations that improve network performance and perform possibly other roles. In this network configuration 600, server-side proxies do not have to be in-line with the connections with the wide-area network.
  • Network 600 includes a set of routers 620. Each of the set of routers 620 has a connection with one or more wide-area networks. A set of interceptor modules 625 are connected with the set of routers 620. As explained in detail below, the set of interceptor modules 625 are adapted to intercept and, if necessary, redirect network traffic to preserve routing symmetry. In an embodiment, each of the set of routers 620 is associated with one of the set of interceptor modules 625. In alternate embodiments, routers and interceptor modules may be associated in different ratios.
  • The set of interceptor modules are connected with each other and the set of server-side proxies 605, 610, and 615 via a local network 630 that includes one or more network switches and other networking devices, such as network switches 631, 633, and 635. A set 640 of one or more servers, each labeled “S” in FIG. 6, is also connected with local network 630. The set of servers 640 provide applications, information, and services to one or more clients. For clarity, clients are omitted from FIG. 6, but might be coupled to routers 620.
  • The set of interceptor modules 625 preserve routing symmetry for network traffic between clients and the set of servers 640. For example, a client sends an initial message 650 to a server. Initial message 650 can be communicated from the client, via a client-side network proxy, and through a wide-area network, not shown, to reach network 600. Message 650 may be directed at a specific one of the set of servers 640 or in general to any of the set of servers 640 or a subset thereof.
  • Upon receipt of initial message 650 via router 620(a) of the set of routers 620, message 650 is passed to associated interceptor module 625(a). If routing symmetry needs to be preserved for this and possibly subsequent communications with this client, interceptor module 625(a) selects an appropriate server-side proxy to associate with the client's client-side proxy. Embodiments of interceptor module 625(a) can select a server-side proxy in any number of ways to achieve load-balancing or other goals. Example load-balancing schemes can include round-robin, load-based, sticky, mapping using hashes of an IP address or other message property, or any other load-balancing scheme used for manipulating network traffic that is known in the art and suitable for such operations.
  • In accordance with this selection, interceptor module 625(a) sends the initial message 650 to the selected server-side proxy. Additionally, interceptor module 625(a) sends a new-connection information message 665 to the each of other interceptor modules of set 625 and stores a copy of this new-connection information for itself. In an embodiment, the new-connection information message 665 is communicated with the other interceptor modules using a unicast, multicast, or broadcast network protocol on the network 630. It should be understood that similar operations could be done with proxy/interceptor pairs other than 620(a)/625(a).
  • In an embodiment, the new-connection information message 665 includes one or more routing table rules for redirecting network traffic associated with the pertinent client to the selected server-side proxy. In a further embodiment, the routing table rules include one or more rules for redirecting network traffic from the pertinent client to the selected server-side proxy. Additionally, the routing table rules include one or more rules for redirecting network traffic from one or more of the set of servers 640 and directed to that client to the selected server-side proxy.
  • In further embodiments, network traffic associated with a given client is assigned to a unique port of the selected server-side proxy. In an embodiment, an autodiscovery protocol is used so that the client-side proxy and interceptor modules learn which port to connect with on the selected server-side proxy. In another embodiment, a set of rules on the client-side proxy and/or the interceptor modules define the appropriate port to connect with on the server proxy.
  • Once the other interceptor modules of set 625 have received the new-connection information message 665, all network traffic associated with the client will be redirected through the selected server-side proxy. For example, a message 670 from server 640(b) directed to the client will travel through local network 630. Upon reaching one of the set of interceptors 625, the receiving interceptor module will match message 670 with its stored new-connection information for the client. In response, that interceptor module will redirect message 670 to the previously selected server-side proxy. The selected server-side proxy will process and/or transform message 670 and then send the resulting message back through any one of the set of interceptor modules 625 and associated one of the set of routers 620 to the client. In another embodiment, the new-connection information is received by the set of routers 620, which processes network traffic in a similar manner.
  • Similarly, a subsequent message 680 from the client to one of the set of servers 640 will be received by one of the set of interceptors 625, such as interceptor 625(c) in this example. Interceptor module 625(c) will match message 680 with its stored new-connection information for the client. In response, the interceptor module 625(c) will redirect message 680 to the previously selected server-side proxy. The selected server-side proxy will process and/or transform message 680 and then send the resulting message back through local network 630 to one of the set of servers 640.
  • In an alternate embodiment, the some or all of the network proxies can be integrated with the interceptor modules, such that each combined unit includes a network proxy for processing and transforming associated network traffic, and an interceptor module for monitoring network traffic, creating new-connection information, and using new-connection information to redirect messages as needed to other standalone network proxies or combined interceptor module and network proxy units. In this embodiment, standalone interceptor modules can also be employed to cover additional connections with a wide-area network.
  • In a further embodiment, network proxies can be dynamically removed from the network. Neighbor proxies receive new-connection information and store this information in a neighbor table. Additionally, in this embodiment, neighbor proxies provide an acknowledgment message to the owner proxy. If the owner proxy does not receive an acknowledgment back from one or more of its neighbor proxies, the owner proxy assumes the non-responsive neighbor proxies are disabled and can purge its own neighbor table of entries associated with the non-responsive neighbor proxies.
  • The outlined flow is for an embodiment in which each message is unambiguously handled by either the receiving proxy or a neighbor. In some embodiments, it may be possible for a message to be handled either by the receiving proxy or by one of its neighbors. In such an embodiment, where such a choice should be resolved in favor of the receiving proxy, the message processing flow will include a test after receiving a message and before checking for “neighbor ownership” to determine if the message matches one that can be handled by the receiving proxy. If the message can be handled by the receiving proxy, then processing would involve normal processing and no need for the checking step.
  • Although the invention has been discussed with respect to specific embodiments thereof, these embodiments are merely illustrative, and not restrictive, of the invention. Furthermore, the system architecture discussed above is for the purposes of illustration. The invention can be implemented in numerous different forms including as a stand-alone application or as a module integrated with other applications. Thus, the scope of the invention is to be determined solely by the claims.

Claims (29)

1. A system comprising:
a first unit connected between a local network and a wide-area network, wherein the first unit is adapted to receive at least an initial message from a client, and wherein the first unit includes logic adapted to select a network proxy for processing a subsequent message associated with the initial message and to generate connection information identifying and redirecting the initial message and subsequent messages associated with the initial message to the selected network proxy; and
a second unit connected between the local network and the wide-area network, wherein the second unit is adapted to receive a message;
wherein the first unit includes logic adapted to communicate the connection information with the second unit; and
wherein the second unit includes logic adapted to determine if a received message is associated with the initial message using the connection information and to redirect the received message to the selected network proxy for processing in response to the determination that the received message is associated with the initial message.
2. The system of claim 1, wherein the first unit and the second unit are connected with the client via the local network.
3. The system of claim 1, wherein the first unit and the second unit are connected with the client via the wide-area network.
4. The system of claim 1, wherein the first unit includes the selected network proxy.
5. The system of claim 1, wherein the selected network proxy is connected with the first unit via the local network.
6. The system of claim 1, wherein the second unit is adapted to redirect the received message by modifying a destination address of the received message.
7. The system of claim 1, wherein the second unit is adapted to redirect the received message using a tunneling protocol to encapsulate at least a portion of the received message.
8. The system of claim 1, wherein the first unit is adapted to store the connection information and wherein the first unit includes logic adapted to determine if a subsequently received message is associated with the initial message using the connection information and to redirect the received message to the selected network proxy for processing in response to the determination that the received message is associated with the initial message.
9. The system of claim 1, wherein the selected network proxy is adapted to form an association with a corresponding network proxy, wherein the association is adapted to facilitate communication of messages over the wide-area network.
10. The system of claim 9, wherein the selected network proxy is adapted to process the received message to produce a transformed message, wherein the transformed message is equivalent to a message previously received by the corresponding network proxy.
11. The system of claim 9, wherein the selected network proxy is adapted to process the received message to produce a transformed message, wherein the transformed message is optimized for communication over the wide-area network.
12. A device for managing network traffic, the device comprising:
a first interface adapted to receive network traffic that has passed through a local network;
a second interface adapted to receive network traffic that has passed through a wide-area network;
logic adapted to receive connection information from an additional device, wherein the connection information includes information identifying network traffic associated with an initial message of a first client and information specifying a network proxy;
logic adapted to utilize the connection information to identify network traffic associated with the initial message; and
logic adapted to utilize the connection information to redirect identified network traffic to the network proxy specified by the connection information.
13. The device of claim 12, further comprising:
logic adapted to identify an initial message from a second client in network traffic received via the first or second interfaces;
logic adapted to select a network proxy for processing a subsequent message associated with the initial message of the second client;
logic adapted to generate connection information for network traffic associated with the initial message of the second client, wherein the connection information includes information identifying network traffic associated with the initial message of the second client and information specifying the selected network proxy; and
logic adapted to communicate the connection information with at least one additional device.
14. The device of claim 13, further comprising:
the selected network proxy;
logic adapted to receive network traffic redirected by at least one additional device to the selected network proxy; and
logic adapted to provide the network traffic redirected by at least one additional device to the selected network proxy.
15. The device of claim 14, wherein the selected network proxy is adapted to form an association with a second network proxy for network traffic associated with the initial message of the second client, wherein the association is adapted to facilitate communication of the network traffic associated with the initial message of the second client over a wide-area network.
16. The device of claim 15, wherein the selected network proxy is adapted to transform network traffic associated with the initial message of the second client, wherein the transformed network traffic is equivalent to network traffic previously received by the second network proxy.
17. The device of claim 13, wherein the device is adapted to receive the initial message from the second client via the first interface.
18. The device of claim 13, wherein the device is adapted to receive the initial message from the second client via the second interface.
19. The device of claim 12, wherein the logic adapted to utilize the connection information to redirect identified network traffic to the network proxy specified by the connection information includes:
logic adapted to modify a destination address of the identified network traffic to the an address of the network proxy provided by the connection information.
20. The device of claim 12, wherein the logic adapted to utilize the connection information to redirect identified network traffic to the network proxy specified by the connection information includes:
logic adapted to utilize a tunneling protocol to communicate the identified network traffic with the network proxy specified by the connection information.
21. In a network usable by clients and servers for conveying messages therebetween comprising transactions wherein a transaction comprises one or more messages from a client forming a client request to a server and one or more messages from the server forming a server response to the client, wherein at least one message from the client might be conveyed from the client to the server via an owning proxy, a system for ensuring that the owning proxy has access to all necessary parts of the transaction, the owning proxy being a proxy that is programmed to expect such access, the system comprising:
logic in the owning proxy for maintaining connection status;
logic in the owning proxy for conveying connection status information to neighboring proxies, wherein connection status information indicates at least one transaction owned by the owning proxy and neighboring proxies are proxies that can, or might be expected to, receive messages as part of a transaction owned by the owning proxy but not directed to the owning proxy; and
at least one neighboring proxy with logic for tracking transaction ownership and logic for transferring messages to an owning proxy when indicated by tracked transaction ownership information.
22. The system of claim 21, wherein the owning proxy is a client-side proxy connected with at least one client via a local area portion of the network.
23. The system of claim 21, wherein the owning proxy is a server-side proxy connected with at least one server via a local area portion of the network.
24. The system of claim 21, wherein the logic of the neighboring proxy for transferring messages to an owning proxy is adapted to modify a destination address of a message received by the neighboring proxy.
25. The system of claim 21, wherein the logic of the neighboring proxy for transferring messages to an owning proxy is adapted to encapsulate at least a portion of a message received by the neighboring proxy using a tunneling protocol.
26. The system of claim 21, wherein the logic for tracking transaction ownership includes logic adapted to store the connection status information and logic adapted to determine if a message received by the neighboring proxy is associated with a transaction indicated by the connection status information.
27. The system of claim 21, further comprising:
at least one additional proxy adapted to form an association with the owning proxy, wherein the owning proxy and the additional proxy each include logic adapted to facilitate communication of messages between a client and a server via the owning proxy and the additional proxy over at least a portion of the network.
28. The system of claim 27, wherein the owning proxy is adapted to process messages to produce transformed messages, wherein the transformed messages are equivalent to messages previously received by the owing proxy from the client.
29. The system of claim 27, wherein the owning proxy is adapted to process messages to produce transformed messages, wherein the transformed messages are equivalent to messages previously received by the owing proxy from the server.
US11/377,906 2005-03-18 2006-03-15 Connection forwarding Abandoned US20060248194A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US66336605P true 2005-03-18 2005-03-18
US11/377,906 US20060248194A1 (en) 2005-03-18 2006-03-15 Connection forwarding

Applications Claiming Priority (10)

Application Number Priority Date Filing Date Title
US11/377,906 US20060248194A1 (en) 2005-03-18 2006-03-15 Connection forwarding
EP06738927.0A EP1861793A4 (en) 2005-03-18 2006-03-16 Connection forwarding
PCT/US2006/009945 WO2006102196A2 (en) 2005-03-18 2006-03-16 Connection forwarding
JP2008502134A JP4902635B2 (en) 2005-03-18 2006-03-16 Connection transfer
AU2006227302A AU2006227302B2 (en) 2005-03-18 2006-03-16 Connection forwarding
IL18595407A IL185954D0 (en) 2005-03-18 2007-09-16 Connection forwarding
US12/331,257 US8140690B2 (en) 2005-03-18 2008-12-09 Connection forwarding
US13/410,032 US8386637B2 (en) 2005-03-18 2012-03-01 Connection forwarding
US13/755,398 US20130145036A1 (en) 2005-03-18 2013-01-31 Connection forwarding
US13/867,499 US9332091B2 (en) 2006-03-08 2013-04-22 Address manipulation to provide for the use of network tools even when transaction acceleration is in use over a network

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US12/331,257 Division US8140690B2 (en) 2005-03-18 2008-12-09 Connection forwarding

Publications (1)

Publication Number Publication Date
US20060248194A1 true US20060248194A1 (en) 2006-11-02

Family

ID=37024465

Family Applications (4)

Application Number Title Priority Date Filing Date
US11/377,906 Abandoned US20060248194A1 (en) 2005-03-18 2006-03-15 Connection forwarding
US12/331,257 Active 2026-06-05 US8140690B2 (en) 2005-03-18 2008-12-09 Connection forwarding
US13/410,032 Active US8386637B2 (en) 2005-03-18 2012-03-01 Connection forwarding
US13/755,398 Abandoned US20130145036A1 (en) 2005-03-18 2013-01-31 Connection forwarding

Family Applications After (3)

Application Number Title Priority Date Filing Date
US12/331,257 Active 2026-06-05 US8140690B2 (en) 2005-03-18 2008-12-09 Connection forwarding
US13/410,032 Active US8386637B2 (en) 2005-03-18 2012-03-01 Connection forwarding
US13/755,398 Abandoned US20130145036A1 (en) 2005-03-18 2013-01-31 Connection forwarding

Country Status (6)

Country Link
US (4) US20060248194A1 (en)
EP (1) EP1861793A4 (en)
JP (1) JP4902635B2 (en)
AU (1) AU2006227302B2 (en)
IL (1) IL185954D0 (en)
WO (1) WO2006102196A2 (en)

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070106761A1 (en) * 2004-05-04 2007-05-10 Beoughter Ken J Service-oriented architecture for process control systems
US20070283023A1 (en) * 2006-05-30 2007-12-06 Riverbed Technology, Inc. Selecting proxies from among autodiscovered proxies
US20070283024A1 (en) * 2006-03-08 2007-12-06 Riverbed Technology, Inc. Address manipulation for network transparency and troubleshooting
US20080005274A1 (en) * 2006-05-26 2008-01-03 Riverbed Technology, Inc. Throttling of predictive acks in an accelerated network communication system
US20080205445A1 (en) * 2007-02-28 2008-08-28 Cisco Technology, Inc. Optimizing TCP traffic via an SCTP association
US20080298366A1 (en) * 2007-05-31 2008-12-04 Microsoft Corporation Agnostic Network Architecture
US20090019108A1 (en) * 2007-07-11 2009-01-15 International Business Machines Corporation System and method for application server/operating system network/configuration management
US20090245163A1 (en) * 2008-03-25 2009-10-01 Nec Infrontia Corporation Access point device for wireless lan and method of securing communication path
US20090328054A1 (en) * 2008-06-26 2009-12-31 Microsoft Corporation Adapting message delivery assignments with hashing and mapping techniques
US20110231655A1 (en) * 2010-03-19 2011-09-22 F5 Networks, Inc. Proxy ssl handoff via mid-stream renegotiation
CN102291467A (en) * 2011-09-15 2011-12-21 电子科技大学 An adaptation communications platform private cloud environments and communication methods
US8364815B2 (en) 2005-03-18 2013-01-29 Riverbed Technology, Inc. Reliability and availability of distributed servers
US8782393B1 (en) 2006-03-23 2014-07-15 F5 Networks, Inc. Accessing SSL connection data by a third-party
US20140201308A1 (en) * 2013-01-16 2014-07-17 Cisco Technology, Inc. Method for optimizing wan traffic
US9294408B1 (en) * 2012-07-02 2016-03-22 Amazon Technologies, Inc. One-to-many stateless load balancing
US9300748B2 (en) 2013-01-16 2016-03-29 Cisco Technology, Inc. Method for optimizing WAN traffic with efficient indexing scheme
US9306997B2 (en) 2013-01-16 2016-04-05 Cisco Technology, Inc. Method for optimizing WAN traffic with deduplicated storage
US20160127241A1 (en) * 2014-10-31 2016-05-05 Samsung Sds Co., Ltd. Apparatus and method for flow control
US9578126B1 (en) * 2011-04-30 2017-02-21 F5 Networks, Inc. System and method for automatically discovering wide area network optimized routes and devices
US9667543B2 (en) 2014-08-08 2017-05-30 Microsoft Technology Licensing, Llc Routing requests with varied protocols to the same endpoint within a cluster
US9973387B1 (en) * 2007-08-06 2018-05-15 Symantec Corporation System and method of traffic inspection and stateful connection forwarding among geographically dispersed network alliances organized as clusters
US10097616B2 (en) 2012-04-27 2018-10-09 F5 Networks, Inc. Methods for optimizing service of content requests and devices thereof
US10187317B1 (en) 2013-11-15 2019-01-22 F5 Networks, Inc. Methods for traffic rate control and devices thereof
US10230566B1 (en) 2012-02-17 2019-03-12 F5 Networks, Inc. Methods for dynamically constructing a service principal name and devices thereof

Families Citing this family (39)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7428752B2 (en) * 2001-06-01 2008-09-23 Applications In Internet Time, Llc Secure data accessing system and method
US20060248194A1 (en) * 2005-03-18 2006-11-02 Riverbed Technology, Inc. Connection forwarding
US7653075B2 (en) 2005-05-23 2010-01-26 Juniper Networks, Inc. Processing communication flows in asymmetrically routed networks
US9571559B2 (en) 2009-01-28 2017-02-14 Headwater Partners I Llc Enhanced curfew and protection associated with a device group
US9955332B2 (en) 2009-01-28 2018-04-24 Headwater Research Llc Method for child wireless device activation to subscriber account of a master wireless device
US9565707B2 (en) 2009-01-28 2017-02-07 Headwater Partners I Llc Wireless end-user device with wireless data attribution to multiple personas
US9578182B2 (en) 2009-01-28 2017-02-21 Headwater Partners I Llc Mobile device and service management
US9647918B2 (en) 2009-01-28 2017-05-09 Headwater Research Llc Mobile device and method attributing media services network usage to requesting application
US9557889B2 (en) 2009-01-28 2017-01-31 Headwater Partners I Llc Service plan design, user interfaces, application programming interfaces, and device management
US9270559B2 (en) 2009-01-28 2016-02-23 Headwater Partners I Llc Service policy implementation for an end-user device having a control application or a proxy agent for routing an application traffic flow
US10057775B2 (en) 2009-01-28 2018-08-21 Headwater Research Llc Virtualized policy and charging system
US9980146B2 (en) 2009-01-28 2018-05-22 Headwater Research Llc Communications device with secure data path processing agents
US9858559B2 (en) 2009-01-28 2018-01-02 Headwater Research Llc Network service plan design
US9954975B2 (en) 2009-01-28 2018-04-24 Headwater Research Llc Enhanced curfew and protection associated with a device group
US10237757B2 (en) 2009-01-28 2019-03-19 Headwater Research Llc System and method for wireless network offloading
US8275830B2 (en) 2009-01-28 2012-09-25 Headwater Partners I Llc Device assisted CDR creation, aggregation, mediation and billing
US10064055B2 (en) 2009-01-28 2018-08-28 Headwater Research Llc Security, fraud detection, and fraud mitigation in device-assisted services systems
US8402111B2 (en) 2009-01-28 2013-03-19 Headwater Partners I, Llc Device assisted services install
US8346225B2 (en) 2009-01-28 2013-01-01 Headwater Partners I, Llc Quality of service for device assisted services
US9572019B2 (en) 2009-01-28 2017-02-14 Headwater Partners LLC Service selection set published to device agent with on-device service selection
US8340634B2 (en) 2009-01-28 2012-12-25 Headwater Partners I, Llc Enhanced roaming services and converged carrier networks with device assisted services and a proxy
US8832777B2 (en) 2009-03-02 2014-09-09 Headwater Partners I Llc Adapting network policies based on device service processor configuration
US9392462B2 (en) 2009-01-28 2016-07-12 Headwater Partners I Llc Mobile end-user device with agent limiting wireless data communication for specified background applications based on a stored policy
US8839388B2 (en) 2009-01-28 2014-09-16 Headwater Partners I Llc Automated device provisioning and activation
US9706061B2 (en) 2009-01-28 2017-07-11 Headwater Partners I Llc Service design center for device assisted services
US8635335B2 (en) 2009-01-28 2014-01-21 Headwater Partners I Llc System and method for wireless network offloading
US10200541B2 (en) 2009-01-28 2019-02-05 Headwater Research Llc Wireless end-user device with divided user space/kernel space traffic policy system
US8589541B2 (en) 2009-01-28 2013-11-19 Headwater Partners I Llc Device-assisted services for protecting network capacity
US8406748B2 (en) 2009-01-28 2013-03-26 Headwater Partners I Llc Adaptive ambient services
US8626115B2 (en) 2009-01-28 2014-01-07 Headwater Partners I Llc Wireless network service interfaces
US8548428B2 (en) 2009-01-28 2013-10-01 Headwater Partners I Llc Device group partitions and settlement platform
US9015233B2 (en) 2012-06-29 2015-04-21 At&T Intellectual Property I, L.P. System and method for segregating layer seven control and data traffic
JP6049876B2 (en) * 2012-07-10 2016-12-21 エンパイア テクノロジー ディベロップメント エルエルシー Push management scheme
WO2014159862A1 (en) 2013-03-14 2014-10-02 Headwater Partners I Llc Automated credential porting for mobile devices
JP6160151B2 (en) * 2013-03-21 2017-07-12 富士通株式会社 Repeater, and routing control method
US20150237155A1 (en) * 2014-02-19 2015-08-20 Level 3 Communications, Llc Proxy server failover and load clustering
JP6395405B2 (en) * 2014-03-18 2018-09-26 キヤノン株式会社 The information processing apparatus, information processing method, and program
WO2016144215A1 (en) * 2015-03-09 2016-09-15 Telefonaktiebolaget Lm Ericsson (Publ) Enabling transmission encryption
US10158735B2 (en) * 2015-08-07 2018-12-18 Sonicwall Inc. Read-ahead on signed connections with unsigning, inline, transparent proxies

Citations (44)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5371852A (en) * 1992-10-14 1994-12-06 International Business Machines Corporation Method and apparatus for making a cluster of computers appear as a single host on a network
US6389462B1 (en) * 1998-12-16 2002-05-14 Lucent Technologies Inc. Method and apparatus for transparently directing requests for web objects to proxy caches
US20020062388A1 (en) * 2000-09-12 2002-05-23 Ogier Richard G. System and method for disseminating topology and link-state information to routing nodes in a mobile ad hoc network
US6415329B1 (en) * 1998-03-06 2002-07-02 Massachusetts Institute Of Technology Method and apparatus for improving efficiency of TCP/IP protocol over high delay-bandwidth network
US20030026258A1 (en) * 2001-06-14 2003-02-06 Yukihiro Takatani Communication system
US20030043802A1 (en) * 2001-08-31 2003-03-06 Takeki Yazaki Packet transferring method and apparatus that employs the same
US6643287B1 (en) * 1999-11-24 2003-11-04 Pluris, Inc. Apparatus and method for forwarding encapsulated data packets on a network having multiple links between nodes
US20030225912A1 (en) * 2002-05-30 2003-12-04 Hitachi, Ltd. Address translation equipment, terminal equipment and mobile communication method
US6701374B2 (en) * 1999-07-29 2004-03-02 Sun Microsystems, Inc. Method and apparatus for dynamic proxy insertion in network traffic flow
US6728748B1 (en) * 1998-12-01 2004-04-27 Network Appliance, Inc. Method and apparatus for policy based class of service and adaptive service level management within the context of an internet and intranet
US6751221B1 (en) * 1996-10-04 2004-06-15 Kabushiki Kaisha Toshiba Data transmitting node and network inter-connection node suitable for home network environment
US20040133688A1 (en) * 2002-12-20 2004-07-08 Fujitsu Limited Server system using local address
US6820132B1 (en) * 1998-02-02 2004-11-16 Loral Cyberstar, Inc. Internet communication system and method with asymmetric terrestrial and satellite links
US20040243703A1 (en) * 2003-04-14 2004-12-02 Nbt Technology, Inc. Cooperative proxy auto-discovery and connection interception
US20040264481A1 (en) * 2003-06-30 2004-12-30 Darling Christopher L. Network load balancing with traffic routing
US20050021762A1 (en) * 2000-03-29 2005-01-27 Microsoft Corporation Method of operation of an intelligent transpartent gateway during an FTP session
US20050030975A1 (en) * 2003-08-07 2005-02-10 Bellsouth Intellectual Property Corporation Methods and systems for providing network access service utilizing multiple asymmetric DSL modems per service point
US20050038865A1 (en) * 2001-05-28 2005-02-17 Mitsuhiro Noda Gateway apparatus with LAC function
US20050060426A1 (en) * 2003-07-29 2005-03-17 Samuels Allen R. Early generation of acknowledgements for flow control
US6871235B1 (en) * 1999-12-10 2005-03-22 Nortel Networks Limited Fast path forwarding of link state advertisements using reverse path forwarding
US20050076099A1 (en) * 2003-10-03 2005-04-07 Nortel Networks Limited Method and apparatus for live streaming media replication in a communication network
US6880089B1 (en) * 2000-03-31 2005-04-12 Avaya Technology Corp. Firewall clustering for multiple network servers
US20050100035A1 (en) * 2003-11-11 2005-05-12 Avici Systems, Inc. Adaptive source routing and packet processing
US20050128975A1 (en) * 2003-12-15 2005-06-16 Matsushita Electric Industrial Co. Home agent apparatus, mobile router communication system, and communication method
US20050135360A1 (en) * 2003-12-19 2005-06-23 Changmin Shin Method of providing routing protocol in sensor network
US20050152318A1 (en) * 2004-01-13 2005-07-14 General Motors Corporation. Efficient lightweight information dissemination algorithm for mobile wireless Ad Hoc networks
US20050198351A1 (en) * 2004-02-20 2005-09-08 Microsoft Corporation Content-based routing
US7047315B1 (en) * 2002-03-19 2006-05-16 Cisco Technology, Inc. Method providing server affinity and client stickiness in a server load balancing device without TCP termination and without keeping flow states
US20060155864A1 (en) * 2002-10-10 2006-07-13 Canon Kabushiki Kaisha Communication apparatus, control method of communication apparatus, and control program of communication apparatus
US20060212935A1 (en) * 2005-03-18 2006-09-21 Riverbed Technology, Inc. Reliability and availablity of distributed servers
US7124169B2 (en) * 2003-06-18 2006-10-17 Hitachi, Ltd. Network system and its switches
US20060268944A1 (en) * 2003-07-31 2006-11-30 Yongliang Xu Method for migration between a permanent connection and a switched connection in a transmission network
US20060274718A1 (en) * 2003-08-01 2006-12-07 Stefan Butenweg Inter-domain multipath routing method
US7227872B1 (en) * 2002-06-28 2007-06-05 Cisco Technology, Inc. Mechanisms for providing stateful NAT support in redundant and asymetric routing environments
US7289505B2 (en) * 2002-06-04 2007-10-30 Lucent Technologies Inc. Efficient reverse path forwarding check mechanism
US7480711B2 (en) * 2001-02-28 2009-01-20 Packeteer, Inc. System and method for efficiently forwarding client requests in a TCP/IP computing environment
US7735139B1 (en) * 2006-05-17 2010-06-08 Trend Micro Incorporated In-line scanning of network data in an asymmetric routing environment
US7739398B1 (en) * 2000-11-21 2010-06-15 Avaya Inc. Dynamic load balancer
US7769834B2 (en) * 2006-05-30 2010-08-03 Riverbed Technology, Inc. System for selecting a proxy pair based on configurations of autodiscovered proxies on a network
US7839769B2 (en) * 2007-09-28 2010-11-23 Siemens Enterprise Communications Gmbh & Co. Kg Method for the organization of network nodes in a packet-switched network
US7983207B2 (en) * 2009-04-14 2011-07-19 National Chiao Tung University Routing method and routing path recovery mechanism in wireless sensor network environment
US8032641B2 (en) * 2009-04-30 2011-10-04 Blue Coat Systems, Inc. Assymmetric traffic flow detection
US8130747B2 (en) * 2007-08-06 2012-03-06 Blue Coat Systems, Inc. System and method of traffic inspection and stateful connection forwarding among geographically dispersed network appliances organized as clusters
US8140690B2 (en) * 2005-03-18 2012-03-20 Riverbed Technology, Inc. Connection forwarding

Family Cites Families (131)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4641274A (en) 1982-12-03 1987-02-03 International Business Machines Corporation Method for communicating changes made to text form a text processor to a remote host
US4988998A (en) 1989-09-05 1991-01-29 Storage Technology Corporation Data compression system for successively applying at least two data compression methods to an input data stream
US5414850A (en) 1991-08-23 1995-05-09 Stac Electronics, Inc. System for transparently compressing data files in a computer system
US6076084A (en) 1994-01-03 2000-06-13 Norton-Lambert Corp. File transfer method and apparatus utilizing delimiters
US5737594A (en) 1994-07-05 1998-04-07 Trustus Pty Ltd. Method for matching elements of two groups
US5822746A (en) 1994-07-05 1998-10-13 Trustus Pty Ltd Method for mapping a file specification to a sequence of actions
US5990810A (en) 1995-02-17 1999-11-23 Williams; Ross Neil Method for partitioning a block of data into subblocks and for storing and communcating such subblocks
US5838963A (en) 1995-10-25 1998-11-17 Microsoft Corporation Apparatus and method for compressing a data file based on a dictionary file which matches segment lengths
US5771355A (en) 1995-12-21 1998-06-23 Intel Corporation Transmitting electronic mail by either reference or value at file-replication points to minimize costs
US5903723A (en) 1995-12-21 1999-05-11 Intel Corporation Method and apparatus for transmitting electronic mail attachments with attachment references
US5867661A (en) 1996-02-15 1999-02-02 International Business Machines Corporation Method and apparatus of using virtual sockets for reducing data transmitted over a wireless communication link between a client web browser and a host web server using a standard TCP protocol
US5754774A (en) 1996-02-15 1998-05-19 International Business Machine Corp. Client/server communication system
US5758087A (en) 1996-06-14 1998-05-26 International Business Machines Corporation Apparatus and method for predicted response generation
US6347342B1 (en) 1996-07-15 2002-02-12 Next Software, Inc. Method and apparatus for dynamically brokering object messages among object models
AU724356B2 (en) 1996-10-08 2000-09-21 Tiernan Communications, Inc. Apparatus and method for multi-service transport multiplexing
US5941988A (en) 1997-01-27 1999-08-24 International Business Machines Corporation Session and transport layer proxies via TCP glue
US6138162A (en) 1997-02-11 2000-10-24 Pointcast, Inc. Method and apparatus for configuring a client to redirect requests to a caching proxy server based on a category ID with the request
AT311692T (en) 1997-03-07 2005-12-15 Intelligent Compression Techno Network data coding
US5999949A (en) 1997-03-14 1999-12-07 Crandall; Gary E. Text file compression system utilizing word terminators
US5931913A (en) 1997-05-07 1999-08-03 International Business Machines Corporation Methods, system and computer program products for establishing a session between a host and a terminal using a reduced protocol
US6233253B1 (en) 1997-05-23 2001-05-15 Thomson Licensing S.A. System for digital data format conversion and bit stream generation
US5926834A (en) 1997-05-29 1999-07-20 International Business Machines Corporation Virtual data storage system with an overrun-resistant cache using an adaptive throttle based upon the amount of cache free space
US5977890A (en) 1997-06-12 1999-11-02 International Business Machines Corporation Method and apparatus for data compression utilizing efficient pattern discovery
US6009462A (en) 1997-06-16 1999-12-28 Digital Equipment Corporation Replacing large bit component of electronic mail (e-mail) message with hot-link in distributed computer system
US6006268A (en) 1997-07-31 1999-12-21 Cisco Technology, Inc. Method and apparatus for reducing overhead on a proxied connection
US6473406B1 (en) 1997-07-31 2002-10-29 Cisco Technology, Inc. Method and apparatus for transparently proxying a connection
US6085193A (en) 1997-09-29 2000-07-04 International Business Machines Corporation Method and system for dynamically prefetching information via a server hierarchy
JPH11110324A (en) 1997-10-07 1999-04-23 Hitachi Ltd Substitutive server selector and substitutive server
US6173318B1 (en) 1997-12-16 2001-01-09 Intel Corporation Method and apparatus for pre-fetching data for an application using a winsock client layered service provider and a transparent proxy
US6151708A (en) 1997-12-19 2000-11-21 Microsoft Corporation Determining program update availability via set intersection over a sub-optical pathway
US6822955B1 (en) 1998-01-22 2004-11-23 Nortel Networks Limited Proxy server for TCP/IP network address portability
US6959318B1 (en) 1998-03-06 2005-10-25 Intel Corporation Method of proxy-assisted predictive pre-fetching with transcoding
US6389460B1 (en) 1998-05-13 2002-05-14 Compaq Computer Corporation Method and apparatus for efficient storage and retrieval of objects in and from an object storage device
US6578073B1 (en) 1998-05-13 2003-06-10 Hewlett-Packard Development Company, L.P. Accelerated content delivery over a network using reduced size objects
US6311216B1 (en) 1998-05-29 2001-10-30 Microsoft Corporation Method, computer program product, and system for client-side deterministic routing and URL lookup into a distributed cache of URLS
US6606413B1 (en) 1998-06-01 2003-08-12 Trestle Acquisition Corp. Compression packaged image transmission for telemicroscopy
US6330561B1 (en) 1998-06-26 2001-12-11 At&T Corp. Method and apparatus for improving end to end performance of a data network
US6574618B2 (en) 1998-07-22 2003-06-03 Appstream, Inc. Method and system for executing network streamed application
NL1009763C2 (en) 1998-07-29 2000-02-01 Koninkl Kpn Nv A method and system for transmitting a series of data elements to the exclusion of certain particular data elements.
US6212565B1 (en) 1998-08-26 2001-04-03 Sun Microsystems, Inc. Apparatus and method for improving performance of proxy server arrays that use persistent connections
US6563517B1 (en) 1998-10-02 2003-05-13 International Business Machines Corp. Automatic data quality adjustment to reduce response time in browsing
US6219642B1 (en) 1998-10-05 2001-04-17 Legerity, Inc. Quantization using frequency and mean compensated frequency input data for robust speech recognition
US6397253B1 (en) 1998-10-06 2002-05-28 Bull Hn Information Systems Inc. Method and system for providing high performance Web browser and server communications
US6163811A (en) 1998-10-21 2000-12-19 Wildseed, Limited Token based source file compression/decompression and its application
US6279041B1 (en) 1998-11-13 2001-08-21 International Business Machines Corporation Methods, systems and computer program products for differencing data communications using a message queue
US6487538B1 (en) 1998-11-16 2002-11-26 Sun Microsystems, Inc. Method and apparatus for local advertising
US7225264B2 (en) 1998-11-16 2007-05-29 Softricity, Inc. Systems and methods for delivering content over a computer network
US6178461B1 (en) 1998-12-08 2001-01-23 Lucent Technologies Inc. Cache-based compaction technique for internet browsing using similar objects in client cache as reference objects
DE69927238T2 (en) 1999-02-26 2006-07-13 Lucent Technologies Inc. Mobile IP with support for Quality of Service
EP1035708B1 (en) 1999-03-05 2007-01-17 International Business Machines Corporation Method and system for optimally selecting a web firewall in a TCP/IP network
JP4299911B2 (en) 1999-03-24 2009-07-22 株式会社東芝 Information transfer system
JP2000293424A (en) 1999-04-09 2000-10-20 Hitachi Ltd Network cache device and cache controlling method
US6430539B1 (en) 1999-05-06 2002-08-06 Hnc Software Predictive modeling of consumer financial behavior
GB9911989D0 (en) 1999-05-25 1999-07-21 Pace Micro Tech Plc Data transport strems processing
US6415323B1 (en) 1999-09-03 2002-07-02 Fastforward Networks Proximity-based redirection system for robust and scalable service-node location in an internetwork
GB2354609B (en) 1999-09-25 2003-07-16 Ibm Method and system for predicting transactions
US6721780B1 (en) 1999-11-09 2004-04-13 Fireclick, Inc. Predictive pre-download of network objects
US7047485B1 (en) 1999-11-10 2006-05-16 International Business Machines Corporation Intelligent pre-caching on a network
US6449658B1 (en) 1999-11-18 2002-09-10 Quikcat.Com, Inc. Method and apparatus for accelerating data through communication networks
US7016973B1 (en) 1999-11-19 2006-03-21 At&T Corp. Apparatus and methods for providing translucent proxies in a communications network
US6415368B1 (en) 1999-12-22 2002-07-02 Xerox Corporation System and method for caching
US6742043B1 (en) 2000-01-14 2004-05-25 Webtv Networks, Inc. Reformatting with modular proxy server
US6553141B1 (en) 2000-01-21 2003-04-22 Stentor, Inc. Methods and apparatus for compression of transform data
US6820133B1 (en) 2000-02-07 2004-11-16 Netli, Inc. System and method for high-performance delivery of web content using high-performance communications protocol between the first and second specialized intermediate nodes to optimize a measure of communications performance between the source and the destination
US6704730B2 (en) 2000-02-18 2004-03-09 Avamar Technologies, Inc. Hash file system and method for use in a commonality factoring system
US8291007B2 (en) 2000-02-22 2012-10-16 Flash Networks Ltd System and method to accelerate client/server interactions using predictive requests
WO2001065831A2 (en) 2000-03-03 2001-09-07 Thomson Licensing S.A. Demultiplexing device and process for at least two transport streams
WO2001069439A1 (en) 2000-03-17 2001-09-20 Filesx Ltd. Accelerating responses to requests made by users to an internet
US7123613B1 (en) 2000-04-07 2006-10-17 Sun Microsystems, Inc. Apparatus and method for providing a transparent proxy server
US6622168B1 (en) 2000-04-10 2003-09-16 Chutney Technologies, Inc. Dynamic page generation acceleration using component-level caching
US20030009583A1 (en) 2001-05-02 2003-01-09 Mtel Limited Protocol for accelerating messages in a wireless communications environment
US6718404B2 (en) 2000-06-02 2004-04-06 Hewlett-Packard Development Company, L.P. Data migration using parallel, distributed table driven I/O mapping
US20010051927A1 (en) 2000-06-08 2001-12-13 Blinkspeed, Inc. Increasing web page browsing efficiency by periodically physically distributing memory media on which web page data are cached
US7058699B1 (en) 2000-06-16 2006-06-06 Yahoo! Inc. System and methods for implementing code translations that enable persistent client-server communication via a proxy
US6856651B2 (en) 2000-07-25 2005-02-15 Peribit Networks, Inc. System and method for incremental and continuous data compression
IL153955D0 (en) 2000-07-25 2003-07-31 Peribit Networks Inc Network architecture and methods for transparent on-line cross-sessional encoding and transport of network communications data
US7047281B1 (en) 2000-08-08 2006-05-16 Fineground Networks Method and system for accelerating the delivery of content in a networked environment
GB2366163A (en) 2000-08-14 2002-02-27 Global Knowledge Network Ltd Inter-network connection through intermediary server
WO2002015519A2 (en) 2000-08-17 2002-02-21 Mobileum, Inc. Method and system for wireless voice channel/data channel integration
GB2366406A (en) * 2000-09-01 2002-03-06 Ncr Int Inc Downloading and uploading data in information networks
CN1229745C (en) 2000-10-24 2005-11-30 皇家菲利浦电子有限公司 Method and device for prefetching a referenced resource
US6970939B2 (en) 2000-10-26 2005-11-29 Intel Corporation Method and apparatus for large payload distribution in a network
US20020107971A1 (en) 2000-11-07 2002-08-08 Bailey Brian W. Network transport accelerator
US6883035B2 (en) 2000-11-16 2005-04-19 Telefonaktiebolaget Lm Ericsson (Publ) System and method for communicating with temporary compression tables
US7113935B2 (en) 2000-12-06 2006-09-26 Epicrealm Operating Inc. Method and system for adaptive prefetching
US6940835B2 (en) 2000-12-28 2005-09-06 Nortel Networks Limited Application-level mobility support in communications network
US20020138437A1 (en) 2001-01-08 2002-09-26 Lewin Daniel M. Extending an internet content delivery network into an enterprise environment by locating ICDN content servers topologically near an enterprise firewall
US20020092026A1 (en) 2001-01-09 2002-07-11 International Business Machines Corporation Method and apparatus for broadcast delivery of content to a client-side cache based on user preferences
WO2002056478A1 (en) 2001-01-11 2002-07-18 Koninklijke Philips Electronics N.V. Data compression method with identifier of regressive string reference
US7149817B2 (en) 2001-02-15 2006-12-12 Neteffect, Inc. Infiniband TM work queue to TCP/IP translation
US7310687B2 (en) 2001-03-23 2007-12-18 Cisco Technology, Inc. Methods and systems for managing class-based condensation
US6996841B2 (en) 2001-04-19 2006-02-07 Microsoft Corporation Negotiating secure connections through a proxy server
US6839761B2 (en) * 2001-04-19 2005-01-04 Microsoft Corporation Methods and systems for authentication through multiple proxy servers that require different authentication data
US20020161904A1 (en) 2001-04-30 2002-10-31 Xerox Corporation External access to protected device on private network
US7058763B2 (en) 2001-05-04 2006-06-06 Lucent Technologies Inc. File system for caching web proxies
JP3798263B2 (en) 2001-06-01 2006-07-19 三菱電機株式会社 E-mail server and e-mail cache methods and e-mail cache program
US7159014B2 (en) 2001-06-04 2007-01-02 Fineground Networks Method and system for efficient and automated version management of embedded objects in web documents
US6947444B2 (en) 2001-06-06 2005-09-20 Ipr Licensing, Inc. Method and apparatus for improving utilization efficiency of wireless links for web-based applications
US6981029B1 (en) 2001-07-17 2005-12-27 Cisco Technology, Inc. System and method for processing a request for information in a network
AU2002323364A1 (en) 2001-08-24 2003-03-10 Peribit Networks, Inc. Dynamic multi-point meshed overlay network
US20030055826A1 (en) 2001-09-14 2003-03-20 Kevin Graham System and method for connecting to and controlling to disparate databases
US7209977B2 (en) 2001-10-01 2007-04-24 International Business Machines Corporation Method and apparatus for content-aware web switching
JP3785343B2 (en) * 2001-10-02 2006-06-14 日本電信電話株式会社 Data communication method in a client-server system and the client server system
US20030105837A1 (en) 2001-11-30 2003-06-05 Yury Kamen Interception for optimal caching of distributed applications
US7370120B2 (en) 2001-12-07 2008-05-06 Propel Software Corporation Method and system for reducing network latency in data communication
JP3826782B2 (en) 2001-12-12 2006-09-27 ソニー株式会社 Data transmission system, information processing apparatus and method, recording medium, and program
US7506058B2 (en) 2001-12-28 2009-03-17 International Business Machines Corporation Method for transmitting information across firewalls
US7010762B2 (en) 2002-02-27 2006-03-07 At&T Corp. Pre-loading content to caches for information appliances
EP1488333B1 (en) 2002-03-01 2010-10-06 Enterasys Networks, Inc. Location aware data network
US20030212739A1 (en) 2002-05-09 2003-11-13 Antoine Boucher Store and forward architecture
US7685287B2 (en) 2002-05-30 2010-03-23 Microsoft Corporation Method and system for layering an infinite request/reply data stream on finite, unidirectional, time-limited transports
JP3952860B2 (en) 2002-05-30 2007-08-01 株式会社日立製作所 Protocol converter
US6678828B1 (en) 2002-07-22 2004-01-13 Vormetric, Inc. Secure network file access control system
US7161947B1 (en) 2002-07-30 2007-01-09 Cisco Technology, Inc. Methods and apparatus for intercepting control and data connections
US7953820B2 (en) 2002-09-11 2011-05-31 Hughes Network Systems, Llc Method and system for providing enhanced performance of web browsing
US6667700B1 (en) 2002-10-30 2003-12-23 Nbt Technology, Inc. Content-based segmentation scheme for data compression in storage and transmission including hierarchical segment representation
US7120666B2 (en) 2002-10-30 2006-10-10 Riverbed Technology, Inc. Transaction accelerator for client-server communication systems
US8078759B2 (en) 2002-11-06 2011-12-13 Tellique Kommunikationstechnik Gmbh Method for prefetching of structured data between a client device and a server device
US7219154B2 (en) 2002-12-31 2007-05-15 International Business Machines Corporation Method and system for consolidated sign-off in a heterogeneous federated environment
JP2004254039A (en) 2003-02-19 2004-09-09 Ntt Docomo Inc Mail communication relay system, mail communication relay apparatus, mail communication relay method, and mail communication relay program
US20050234643A1 (en) 2003-11-21 2005-10-20 Charles Abraham Method and apparatus for managing network elements in a satellite navigation data distribution system
US8069225B2 (en) 2003-04-14 2011-11-29 Riverbed Technology, Inc. Transparent client-server transaction accelerator
US7606929B2 (en) * 2003-06-30 2009-10-20 Microsoft Corporation Network load balancing with connection manipulation
US7650416B2 (en) 2003-08-12 2010-01-19 Riverbed Technology Content delivery for client-server protocols with user affinities using connection end-point proxies
US7600230B2 (en) 2004-07-06 2009-10-06 Oracle International Corporation System and method for managing security meta-data in a reverse proxy
US7853699B2 (en) 2005-03-15 2010-12-14 Riverbed Technology, Inc. Rules-based transaction prefetching using connection end-point proxies
US7827237B2 (en) 2007-03-12 2010-11-02 Citrix Systems, Inc. Systems and methods for identifying long matches of data in a compression history
US7865585B2 (en) 2007-03-12 2011-01-04 Citrix Systems, Inc. Systems and methods for providing dynamic ad hoc proxy-cache hierarchies
US7460038B2 (en) 2007-03-12 2008-12-02 Citrix Systems, Inc. Systems and methods of clustered sharing of compression histories
US7619545B2 (en) 2007-03-12 2009-11-17 Citrix Systems, Inc. Systems and methods of using application and protocol specific parsing for compression
US7809818B2 (en) 2007-03-12 2010-10-05 Citrix Systems, Inc. Systems and method of using HTTP head command for prefetching

Patent Citations (47)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5371852A (en) * 1992-10-14 1994-12-06 International Business Machines Corporation Method and apparatus for making a cluster of computers appear as a single host on a network
US6751221B1 (en) * 1996-10-04 2004-06-15 Kabushiki Kaisha Toshiba Data transmitting node and network inter-connection node suitable for home network environment
US6820132B1 (en) * 1998-02-02 2004-11-16 Loral Cyberstar, Inc. Internet communication system and method with asymmetric terrestrial and satellite links
US6415329B1 (en) * 1998-03-06 2002-07-02 Massachusetts Institute Of Technology Method and apparatus for improving efficiency of TCP/IP protocol over high delay-bandwidth network
US6728748B1 (en) * 1998-12-01 2004-04-27 Network Appliance, Inc. Method and apparatus for policy based class of service and adaptive service level management within the context of an internet and intranet
US20040162901A1 (en) * 1998-12-01 2004-08-19 Krishna Mangipudi Method and apparatus for policy based class service and adaptive service level management within the context of an internet and intranet
US6389462B1 (en) * 1998-12-16 2002-05-14 Lucent Technologies Inc. Method and apparatus for transparently directing requests for web objects to proxy caches
US6701374B2 (en) * 1999-07-29 2004-03-02 Sun Microsystems, Inc. Method and apparatus for dynamic proxy insertion in network traffic flow
US6643287B1 (en) * 1999-11-24 2003-11-04 Pluris, Inc. Apparatus and method for forwarding encapsulated data packets on a network having multiple links between nodes
US6871235B1 (en) * 1999-12-10 2005-03-22 Nortel Networks Limited Fast path forwarding of link state advertisements using reverse path forwarding
US20050021762A1 (en) * 2000-03-29 2005-01-27 Microsoft Corporation Method of operation of an intelligent transpartent gateway during an FTP session
US6880089B1 (en) * 2000-03-31 2005-04-12 Avaya Technology Corp. Firewall clustering for multiple network servers
US20020062388A1 (en) * 2000-09-12 2002-05-23 Ogier Richard G. System and method for disseminating topology and link-state information to routing nodes in a mobile ad hoc network
US7739398B1 (en) * 2000-11-21 2010-06-15 Avaya Inc. Dynamic load balancer
US7480711B2 (en) * 2001-02-28 2009-01-20 Packeteer, Inc. System and method for efficiently forwarding client requests in a TCP/IP computing environment
US20050038865A1 (en) * 2001-05-28 2005-02-17 Mitsuhiro Noda Gateway apparatus with LAC function
US20030026258A1 (en) * 2001-06-14 2003-02-06 Yukihiro Takatani Communication system
US7376085B2 (en) * 2001-08-31 2008-05-20 Hitachi, Ltd. Packet transferring method and apparatus that employs the same
US20030043802A1 (en) * 2001-08-31 2003-03-06 Takeki Yazaki Packet transferring method and apparatus that employs the same
US7047315B1 (en) * 2002-03-19 2006-05-16 Cisco Technology, Inc. Method providing server affinity and client stickiness in a server load balancing device without TCP termination and without keeping flow states
US20030225912A1 (en) * 2002-05-30 2003-12-04 Hitachi, Ltd. Address translation equipment, terminal equipment and mobile communication method
US7289505B2 (en) * 2002-06-04 2007-10-30 Lucent Technologies Inc. Efficient reverse path forwarding check mechanism
US7280557B1 (en) * 2002-06-28 2007-10-09 Cisco Technology, Inc. Mechanisms for providing stateful NAT support in redundant and asymetric routing environments
US7227872B1 (en) * 2002-06-28 2007-06-05 Cisco Technology, Inc. Mechanisms for providing stateful NAT support in redundant and asymetric routing environments
US20060155864A1 (en) * 2002-10-10 2006-07-13 Canon Kabushiki Kaisha Communication apparatus, control method of communication apparatus, and control program of communication apparatus
US20040133688A1 (en) * 2002-12-20 2004-07-08 Fujitsu Limited Server system using local address
US20040243703A1 (en) * 2003-04-14 2004-12-02 Nbt Technology, Inc. Cooperative proxy auto-discovery and connection interception
US7124169B2 (en) * 2003-06-18 2006-10-17 Hitachi, Ltd. Network system and its switches
US20040264481A1 (en) * 2003-06-30 2004-12-30 Darling Christopher L. Network load balancing with traffic routing
US20050060426A1 (en) * 2003-07-29 2005-03-17 Samuels Allen R. Early generation of acknowledgements for flow control
US20060268944A1 (en) * 2003-07-31 2006-11-30 Yongliang Xu Method for migration between a permanent connection and a switched connection in a transmission network
US20060274718A1 (en) * 2003-08-01 2006-12-07 Stefan Butenweg Inter-domain multipath routing method
US20050030975A1 (en) * 2003-08-07 2005-02-10 Bellsouth Intellectual Property Corporation Methods and systems for providing network access service utilizing multiple asymmetric DSL modems per service point
US20050076099A1 (en) * 2003-10-03 2005-04-07 Nortel Networks Limited Method and apparatus for live streaming media replication in a communication network
US20050100035A1 (en) * 2003-11-11 2005-05-12 Avici Systems, Inc. Adaptive source routing and packet processing
US20050128975A1 (en) * 2003-12-15 2005-06-16 Matsushita Electric Industrial Co. Home agent apparatus, mobile router communication system, and communication method
US20050135360A1 (en) * 2003-12-19 2005-06-23 Changmin Shin Method of providing routing protocol in sensor network
US20050152318A1 (en) * 2004-01-13 2005-07-14 General Motors Corporation. Efficient lightweight information dissemination algorithm for mobile wireless Ad Hoc networks
US20050198351A1 (en) * 2004-02-20 2005-09-08 Microsoft Corporation Content-based routing
US20060212935A1 (en) * 2005-03-18 2006-09-21 Riverbed Technology, Inc. Reliability and availablity of distributed servers
US8140690B2 (en) * 2005-03-18 2012-03-20 Riverbed Technology, Inc. Connection forwarding
US7735139B1 (en) * 2006-05-17 2010-06-08 Trend Micro Incorporated In-line scanning of network data in an asymmetric routing environment
US7769834B2 (en) * 2006-05-30 2010-08-03 Riverbed Technology, Inc. System for selecting a proxy pair based on configurations of autodiscovered proxies on a network
US8130747B2 (en) * 2007-08-06 2012-03-06 Blue Coat Systems, Inc. System and method of traffic inspection and stateful connection forwarding among geographically dispersed network appliances organized as clusters
US7839769B2 (en) * 2007-09-28 2010-11-23 Siemens Enterprise Communications Gmbh & Co. Kg Method for the organization of network nodes in a packet-switched network
US7983207B2 (en) * 2009-04-14 2011-07-19 National Chiao Tung University Routing method and routing path recovery mechanism in wireless sensor network environment
US8032641B2 (en) * 2009-04-30 2011-10-04 Blue Coat Systems, Inc. Assymmetric traffic flow detection

Cited By (51)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9124666B2 (en) 2002-10-30 2015-09-01 Riverbed Technology, Inc. Reliability and availability of distributed servers
US20070106761A1 (en) * 2004-05-04 2007-05-10 Beoughter Ken J Service-oriented architecture for process control systems
US7984096B2 (en) * 2004-05-04 2011-07-19 Fisher-Rosemount Systems, Inc. Service-oriented architecture for process control systems
US8364815B2 (en) 2005-03-18 2013-01-29 Riverbed Technology, Inc. Reliability and availability of distributed servers
US8447802B2 (en) * 2006-03-08 2013-05-21 Riverbed Technology, Inc. Address manipulation to provide for the use of network tools even when transaction acceleration is in use over a network
US20070283024A1 (en) * 2006-03-08 2007-12-06 Riverbed Technology, Inc. Address manipulation for network transparency and troubleshooting
US9332091B2 (en) 2006-03-08 2016-05-03 Riverbed Technology, Inc. Address manipulation to provide for the use of network tools even when transaction acceleration is in use over a network
US9742806B1 (en) 2006-03-23 2017-08-22 F5 Networks, Inc. Accessing SSL connection data by a third-party
US8782393B1 (en) 2006-03-23 2014-07-15 F5 Networks, Inc. Accessing SSL connection data by a third-party
US20080005274A1 (en) * 2006-05-26 2008-01-03 Riverbed Technology, Inc. Throttling of predictive acks in an accelerated network communication system
US8463843B2 (en) 2006-05-26 2013-06-11 Riverbed Technology, Inc. Throttling of predictive ACKs in an accelerated network communication system
US7769834B2 (en) * 2006-05-30 2010-08-03 Riverbed Technology, Inc. System for selecting a proxy pair based on configurations of autodiscovered proxies on a network
US20100268829A1 (en) * 2006-05-30 2010-10-21 Riverbed Technology, Inc. Selecting proxies from among autodiscovered proxies
US20070283023A1 (en) * 2006-05-30 2007-12-06 Riverbed Technology, Inc. Selecting proxies from among autodiscovered proxies
US8380825B2 (en) * 2006-05-30 2013-02-19 Riverbed Technology, Inc. Selecting proxies from among autodiscovered proxies
US8762569B1 (en) * 2006-05-30 2014-06-24 Riverbed Technology, Inc. System for selecting a proxy pair based on configurations of autodiscovered proxies on a network
US20080205445A1 (en) * 2007-02-28 2008-08-28 Cisco Technology, Inc. Optimizing TCP traffic via an SCTP association
US7680051B2 (en) * 2007-02-28 2010-03-16 Cisco Technology, Inc. Optimizing TCP traffic via an SCTP association
US20080298366A1 (en) * 2007-05-31 2008-12-04 Microsoft Corporation Agnostic Network Architecture
US8180865B2 (en) * 2007-07-11 2012-05-15 International Business Machines Corporation System and method for application server/operating system network/configuration management
US20090019108A1 (en) * 2007-07-11 2009-01-15 International Business Machines Corporation System and method for application server/operating system network/configuration management
US9973387B1 (en) * 2007-08-06 2018-05-15 Symantec Corporation System and method of traffic inspection and stateful connection forwarding among geographically dispersed network alliances organized as clusters
US10009230B1 (en) 2007-08-06 2018-06-26 Symantec Corporation System and method of traffic inspection and stateful connection forwarding among geographically dispersed network appliances organized as clusters
US20090245163A1 (en) * 2008-03-25 2009-10-01 Nec Infrontia Corporation Access point device for wireless lan and method of securing communication path
US8243650B2 (en) * 2008-03-25 2012-08-14 Nec Infrontia Corporation Access point device for wireless LAN and method of securing communication path
US20090328054A1 (en) * 2008-06-26 2009-12-31 Microsoft Corporation Adapting message delivery assignments with hashing and mapping techniques
US8095935B2 (en) * 2008-06-26 2012-01-10 Microsoft Corporation Adapting message delivery assignments with hashing and mapping techniques
US8700892B2 (en) 2010-03-19 2014-04-15 F5 Networks, Inc. Proxy SSL authentication in split SSL for client-side proxy agent resources with content insertion
US9100370B2 (en) 2010-03-19 2015-08-04 F5 Networks, Inc. Strong SSL proxy authentication with forced SSL renegotiation against a target server
US9166955B2 (en) 2010-03-19 2015-10-20 F5 Networks, Inc. Proxy SSL handoff via mid-stream renegotiation
US20110231653A1 (en) * 2010-03-19 2011-09-22 F5 Networks, Inc. Secure distribution of session credentials from client-side to server-side traffic management devices
US9178706B1 (en) 2010-03-19 2015-11-03 F5 Networks, Inc. Proxy SSL authentication in split SSL for client-side proxy agent resources with content insertion
US9210131B2 (en) 2010-03-19 2015-12-08 F5 Networks, Inc. Aggressive rehandshakes on unknown session identifiers for split SSL
US9509663B2 (en) 2010-03-19 2016-11-29 F5 Networks, Inc. Secure distribution of session credentials from client-side to server-side traffic management devices
US20110231655A1 (en) * 2010-03-19 2011-09-22 F5 Networks, Inc. Proxy ssl handoff via mid-stream renegotiation
US9705852B2 (en) 2010-03-19 2017-07-11 F5 Networks, Inc. Proxy SSL authentication in split SSL for client-side proxy agent resources with content insertion
US9667601B2 (en) 2010-03-19 2017-05-30 F5 Networks, Inc. Proxy SSL handoff via mid-stream renegotiation
US9172682B2 (en) 2010-03-19 2015-10-27 F5 Networks, Inc. Local authentication in proxy SSL tunnels using a client-side proxy agent
US9578126B1 (en) * 2011-04-30 2017-02-21 F5 Networks, Inc. System and method for automatically discovering wide area network optimized routes and devices
CN102291467A (en) * 2011-09-15 2011-12-21 电子科技大学 An adaptation communications platform private cloud environments and communication methods
US10230566B1 (en) 2012-02-17 2019-03-12 F5 Networks, Inc. Methods for dynamically constructing a service principal name and devices thereof
US10097616B2 (en) 2012-04-27 2018-10-09 F5 Networks, Inc. Methods for optimizing service of content requests and devices thereof
US9294408B1 (en) * 2012-07-02 2016-03-22 Amazon Technologies, Inc. One-to-many stateless load balancing
US9509736B2 (en) * 2013-01-16 2016-11-29 Cisco Technology, Inc. Method for optimizing WAN traffic
US9306997B2 (en) 2013-01-16 2016-04-05 Cisco Technology, Inc. Method for optimizing WAN traffic with deduplicated storage
US9300748B2 (en) 2013-01-16 2016-03-29 Cisco Technology, Inc. Method for optimizing WAN traffic with efficient indexing scheme
US20140201308A1 (en) * 2013-01-16 2014-07-17 Cisco Technology, Inc. Method for optimizing wan traffic
US10187317B1 (en) 2013-11-15 2019-01-22 F5 Networks, Inc. Methods for traffic rate control and devices thereof
US9667543B2 (en) 2014-08-08 2017-05-30 Microsoft Technology Licensing, Llc Routing requests with varied protocols to the same endpoint within a cluster
US20160127241A1 (en) * 2014-10-31 2016-05-05 Samsung Sds Co., Ltd. Apparatus and method for flow control
US9882813B2 (en) * 2014-10-31 2018-01-30 Samsung Sds Co., Ltd. Apparatus and method for flow control

Also Published As

Publication number Publication date
EP1861793A4 (en) 2013-05-01
EP1861793A2 (en) 2007-12-05
US8140690B2 (en) 2012-03-20
WO2006102196A3 (en) 2008-02-07
IL185954D0 (en) 2008-01-06
JP2008536369A (en) 2008-09-04
WO2006102196A2 (en) 2006-09-28
US20090094371A1 (en) 2009-04-09
US8386637B2 (en) 2013-02-26
US20130145036A1 (en) 2013-06-06
US20120166661A1 (en) 2012-06-28
AU2006227302B2 (en) 2012-06-28
JP4902635B2 (en) 2012-03-21
AU2006227302A1 (en) 2006-09-28

Similar Documents

Publication Publication Date Title
US6775692B1 (en) Proxying and unproxying a connection using a forwarding agent
US9241026B2 (en) Facilitating network communications with control server and devices utilizing virtual network connections
US6650641B1 (en) Network address translation using a forwarding agent
US7577164B2 (en) Network architecture and methods for transparent on-line cross-sessional encoding and transport of network communications data
US7596802B2 (en) Method and system for providing connection handling
US8639837B2 (en) System and method of traffic inspection and classification for purposes of implementing session ND content control
US7826487B1 (en) Coalescing acknowledgement responses to improve network communications
US6735169B1 (en) Cascading multiple services on a forwarding agent
US7480707B2 (en) Network communications management system and method
US7343413B2 (en) Method and system for optimizing a network by independently scaling control segments and data flow
EP1521409B1 (en) System and method for load balancing and fail over
US8059562B2 (en) Listener mechanism in a distributed network system
CN101729354B (en) Accelerating data communication method using tunnels
US6535509B2 (en) Tagging for demultiplexing in a network traffic server
EP2813053B1 (en) Method and apparatus for internet protocol based content router
US9900224B2 (en) System and method for implementing and managing virtual networks
US7493389B2 (en) Methods and apparatus for redirecting network cache traffic
US7424014B2 (en) System and method for local packet transport services within distributed routers
Arce et al. An analysis of the slapper worm
US20110173436A1 (en) Method and apparatus for providing secure streaming data transmission facilities using unreliable protocols
US7694011B2 (en) Techniques for load balancing over a cluster of subscriber-aware application servers
US7143169B1 (en) Methods and apparatus for directing messages to computer systems based on inserted data
JP4583091B2 (en) Network load balancing using the connection operation
EP1405198B1 (en) Scalable, reliable session initiation protocol (sip) signaling routing node
US7672236B1 (en) Method and architecture for a scalable application and security switch using multi-level load balancing

Legal Events

Date Code Title Description
AS Assignment

Owner name: RIVERBED TECHNOLOGY, INC., CALIFORNIA

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:LY, KAND;TSENG, JOSHUA;MCCANNE, STEVEN;REEL/FRAME:017873/0764

Effective date: 20060228

AS Assignment

Owner name: MORGAN STANLEY & CO. LLC, MARYLAND

Free format text: SECURITY AGREEMENT;ASSIGNORS:RIVERBED TECHNOLOGY, INC.;OPNET TECHNOLOGIES, INC.;REEL/FRAME:029646/0060

Effective date: 20121218

AS Assignment

Owner name: RIVERBED TECHNOLOGY, INC., CALIFORNIA

Free format text: RELEASE OF PATENT SECURITY INTEREST;ASSIGNOR:MORGAN STANLEY & CO. LLC, AS COLLATERAL AGENT;REEL/FRAME:032113/0425

Effective date: 20131220