CN108667675A - A kind of communication means, communication equipment and private line of communication are for network method - Google Patents
A kind of communication means, communication equipment and private line of communication are for network method Download PDFInfo
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- CN108667675A CN108667675A CN201810922169.0A CN201810922169A CN108667675A CN 108667675 A CN108667675 A CN 108667675A CN 201810922169 A CN201810922169 A CN 201810922169A CN 108667675 A CN108667675 A CN 108667675A
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/46—Interconnection of networks
- H04L12/4641—Virtual LANs, VLANs, e.g. virtual private networks [VPN]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/06—Management of faults, events, alarms or notifications
- H04L41/0654—Management of faults, events, alarms or notifications using network fault recovery
- H04L41/0663—Performing the actions predefined by failover planning, e.g. switching to standby network elements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/16—Implementing security features at a particular protocol layer
- H04L63/168—Implementing security features at a particular protocol layer above the transport layer
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/14—Session management
- H04L67/141—Setup of application sessions
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/16—Implementation or adaptation of Internet protocol [IP], of transmission control protocol [TCP] or of user datagram protocol [UDP]
- H04L69/161—Implementation details of TCP/IP or UDP/IP stack architecture; Specification of modified or new header fields
- H04L69/162—Implementation details of TCP/IP or UDP/IP stack architecture; Specification of modified or new header fields involving adaptations of sockets based mechanisms
Abstract
The invention discloses a kind of communication means, including：Upstream data, it is extracted through user oriented physical network card, after ICP/IP protocol routing forwarding to Microsoft Loopback Adapter, it is sent in the read list and character device of Microsoft Loopback Adapter, and user area is copied to from core space in character device, the data packet of user area is read by EoI VPN modules with after SSL encapsulation, and the physical network card of network-oriented side is sent to through ICP/IP protocol；Downlink data, physical network card through network-oriented side receives, pass through ICP/IP protocol routing forwarding to EoI VPN modules, the character device of Microsoft Loopback Adapter is written to after being parsed using ssl protocol by EoI VPN modules, in character device core space is copied to from user area, and it is written to read list, the data packet in read list is forwarded to the physical network card of user oriented side through ICP/IP protocol again, to be sent on ustomer premises access equipment.
Description
Technical field
The present invention relates to fields of communication technology, and in particular to the standby net side of a kind of communication means, communication equipment and private line of communication
Method.
Background technology
Group's big customer's special line refers to the existence and the prosperous client for having strategic importance to enterprise.In telecommunications industry, group
Big customer is that stable reliable ARPU can be brought to be worth client to operator, occupies very important position in operator, because
This, big customer's special line is very high to the time requirement of safety and the fault recovery of data transmission.Present group big customer's special line
Face following problem：
1, group big customer special line optical cable is easy to interrupt.Optical cable be both buried under the ground by by frame in the air, it is easy to by
To build, repair the roads and ditching construction damage, technical operation mistake, the plague of rats, vehicle damage, fire, shooting, flood, temperature
It influences, the destruction of power line, lightning stroke influences, and causes interruption of optical cables.
2, to promote safety of big customer's special line to data transmission, the special line of Liang Jia operators is typically opened, one
Family's operator's special line is as primary link, and another operator's special line is as backup link.But this two standby line mode costs
It is too high, and since the pipeline resource of operator limits, the access section optical cable of different operators walks the same pipeline, when pipeline goes out to ask
When topic, primary link will fail simultaneously with backup link, causes backup link not used veritably, falls flat.
3, group big customer can not fast implement two layers of transparent transmission of private line service by the wireless VPDN networks of tradition 4G merely, pacify
Full property ensures that cost is excessively high, cannot achieve it is wired to wireless integrated protection mechanism, and can not whole webmaster.Specially：
(1) traditional 3G/4G VPDN technologies can only ensure three layers of IP safe intercommunication, can not provide two layers of pass-through channel, this
Sample increases safety burden and network burden, enterprise or operator to enterprise will also additionally dispose AAA, IPSECVPN, fire wall
Etc. resources ensure safety.
(2) opening for wireless VPDN needs core net to change data, and the more numerous length of APN/VPDN card application processes is delayed special line
Service fulfillment.
(3) client bid to host only a VPDN card, client oneself purchase commonly can support the settings such as 4G dialing, domain name
Router all may be implemented that VPDN special lines are open-minded, and VPDN circuits are of less demanding to dialup router, this is unfavorable for runing in fact
The follow-up special line value of quotient is promoted, and low-price competition is in addition easy to cause.
(4) customer experience is poor, and terminal device relies only on core without management, client to the perception of private line service quality
Net, maintained from front end people lack maintenance service.
(5) in addition excessive to rely on GGSN to do VPN bridge joints, GGSN burdens can be increased, be unfavorable for core net.
Therefore, existing big customer's special line cannot meet group's big customer's demand, urgently need a kind of safety and
The high special line of stability is for network method.
Invention content
The object of the present invention is to provide a kind of communication means, which is based on Microsoft Loopback Adapter and ssl protocol, directly right
Transmission data are backed up and are encapsulated, and the particular content of transmission data is indifferent to, and realize the transparent transmission of transmission data.
It is a further object of the present invention to provide a kind of communication equipment, the communication equipment can in Microsoft Loopback Adapter and ssl protocol,
Directly transmission data are backed up and encapsulated, are indifferent to the particular content of transmission data, realize the transparent transmission of transmission data.
Another object of the present invention is to provide a kind of private line of communication for network method, and the private line of communication is for network method application communication
Equipment, the virtual network established based on communication equipment and 4G networks, multiple client is placed in a LAN, is realized multiple
Special line communication between client.
For achieving the above object, the present invention provides following technical scheme：
On the one hand, a kind of communication means realizes that the communication unit of the communication means includes at least a Microsoft Loopback Adapter and EoI
VPN modules, the communication means include：
The upstream data of communication unit extracts, extremely by ICP/IP protocol routing forwarding through user oriented physical network card
It after Microsoft Loopback Adapter, is sent in the read list and character device of Microsoft Loopback Adapter, and is answered from core space in character device
Make to user area, the data packet of user area by EoI VPN modules read and SSL encapsulation after, through ICP/IP protocol be sent to towards
The physical network card of network side completes upstream data processing；
The downlink data of communication unit, the physical network card through network-oriented side receive, and pass through ICP/IP protocol routing forwarding
To EoI VPN modules, it is written to the character device of Microsoft Loopback Adapter after being parsed using ssl protocol by EoI VPN modules, is set in character
Core space is copied to from user area for middle, and is written to read list, the data packet in read list is assisted through TCP/IP again
View is forwarded to the physical network card of user oriented side, to be sent on ustomer premises access equipment.
Preferably, the communication means provides two kinds of operating modes of tun and tap,
Under tun patterns, IP data packet of the Microsoft Loopback Adapter read-write without physical frame header, EoI VPN modules are to IP data packets
Carry out SSL encapsulation；
Under tap patterns, Microsoft Loopback Adapter reads and writes the data packet for including physical frame header, and EoI VPN modules are to entire physical frame
Carry out SSL encapsulation.
Communication means is operated in Tap patterns, i.e. referred to as network bridge mode, the object that entire virtual network is connected just as bridge mode
Manage network.This Tap patterns can transmit the data packets such as ethernet frame, IPX, NETBIOS, and application range is wider.
Specifically, the communication means Solaris, Linux, OpenBSD, FreeBSD, NetBSD, Mac OS X or
It is run on Windows 2000/XP/Vista.The communication means has wide range of applications.
Before a communication, the communication unit needs to establish SSL secure connections with client, between two clients of realization
Or the communication between client and the total point of client.Specifically, the EOI VPN modules by the network segment of Microsoft Loopback Adapter, address and
Routing is sent to client, to realize the SSL secure connections of both ends client communication.Safety is established when communication unit with client to connect
After connecing, 4G network transmissions to client can be passed through based on ssl protocol by the SSL packets that communication unit encapsulates.
When being carried out data transmission based on above-mentioned communication means, in order to ensure confidentiality and the safety of data, the communication party
Method is additionally provided with security mechanism, and specifically, the communication means takes the exchange of key keys, encapsulation, ca certifications, rsa cryptographic means to exist
The tunnel of secret is set up on public network.
On the other hand, a kind of communication equipment, the communication equipment have above-mentioned communication means.
On the other hand, above-mentioned communication equipment is connect by a kind of private line of communication for network method with a client communication, communication
The other side of equipment is connect by 4G networks with another client device, to build a transparent transmission two between two clients
The channel of layer Ethernet data, realizes the communication of two clients.
Preferably, when the communication equipment detects the fiber optic cable communications exception of client, client transmissions can be received automatically
Data, and be sent on 4G networks after transmission data is backed up and encapsulated in virtual network, through 4G network transmissions to another
Client.
The private line of communication, by 4G/3G wireless networks, realizes two layers of transparent transmission (bridge function) of Ethernet service for network method,
Have the function of fiber optical transceiver, supports the automatic switchover and manual switching of optical-fibre channel and wireless channel, double-circuit standby each other
Part, optical-fibre channel is preferential, and the 4G/3G networks of three big operators, wireless point-to-point application is supported to need VPDN/APN private line networks
It supports, and the private line of communication is higher for the safety and stability of network method, disclosure satisfy that group big customer to private line of communication
Demand.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to do simply to introduce, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art, can be with root under the premise of not making the creative labor
Other accompanying drawings are obtained according to these attached drawings.
Fig. 1 is the flow chart of communication means provided in this embodiment；
Fig. 2 is schematic diagram of the short-term private line of communication for network method；
Fig. 3 is schematic diagram of the long-term communication special line for network method.
Specific implementation mode
To make the objectives, technical solutions, and advantages of the present invention more comprehensible, with reference to the accompanying drawings and embodiments to this
Invention is described in further detail.It should be appreciated that the specific embodiments described herein are only used to explain the present invention,
Do not limit protection scope of the present invention.
Traditional SSL VPN are realized by the method for port proxy, proxy server according to the type of application protocol (such as
Http, telnet etc.) do corresponding port proxy, establish SSL secure connections between client and proxy server, client with
All data transmissions between application server are forwarded by proxy server.This realization method is loaded down with trivial details, and application range also compares
It is relatively narrow：It is only applicable to the application system communicated with TCP fixed ports, and needs the port acted on behalf of individually to be matched to each
It sets；Need the agreement for using dynamic port that must develop again for each, and parsing application protocol in agency could be real
Modern times reason, such as File Transfer Protocol；Other network communication protocols other than TCP cannot be acted on behalf of；The fire prevention of proxy server front end
Wall will also be adjusted accordingly according to the configuration variation of proxy port.
Therefore, the present embodiment provides a kind of communication means, and abbreviation EoInternet, which is a kind of completely new side
Formula realizes the function of SSL VPN, overcomes some defects of traditional SSL VPN, extends application field, and on fire wall
The a port of TCP or udp protocol need to only be opened.
The core of EoInternet is realized based on Microsoft Loopback Adapter and ssl protocol.Microsoft Loopback Adapter is to use network bottom layer
The drive software that programming technique is realized has more on host an existing network interface card after installation, can as other network interface cards into
Row configuration.Service routine can apply layer open Microsoft Loopback Adapter, if application software (such as IE) to Microsoft Loopback Adapter transmission data,
Then service routine can read the data, if service routine writes suitable data to Microsoft Loopback Adapter, application software can also
Reception obtains.Microsoft Loopback Adapter has corresponding realization under many operating system, this is also that EoInternet can be cross-platform
One critically important reason.
In EoInternet, if user accesses a long-range virtual address and (belongs to the address of Microsoft Loopback Adapter adapted
Series is different from true address), then operating system can be by routing mechanism by data packet (TUN patterns) or data frame (TAP moulds
Formula) it is sent on Microsoft Loopback Adapter, service routine receives the data and carries out after handling accordingly, by SOCKET from outer online hair
It sees off, remote service program from outer online reception data, and is carried out after handling accordingly by SOCKET, is sent to virtual net
Card, then application software can receive, and complete the process of an one-way transmission, vice versa.
More than Linux2.4 versions, operating system supports a tun equipment (Microsoft Loopback Adapter), the driving journey of tun equipment
Include two parts in sequence, a part is char device driver, and a part is trawl performance.Trawl performance is from ICP/IP protocol
The packet structure skb that stack receives is put in the reading queue of tun equipment, and consumer process is by calling character equipment interface read to obtain
Complete IP data packets are obtained, the function of char device driver read functions is to read data from the reading queue of equipment, by core
The skb of state passes to user；Char device driver write functions provide the user in turn is written core the data of User space
User data is written core space and penetrates ICP/IP protocol stack by the interface of phychology, write functions.The tun equipment can be with
The mode of character device is read and write, the Microsoft Loopback Adapter as system, it may have the feature identical with physical network card：It being capable of configuration of IP
Address and routing.Use to Microsoft Loopback Adapter is the key that EoInternet realizes its SSL VPN function.
EOI VPN modules generally require one virtual ip address pond of configuration and a personal static virtual IP address is (quiet
State address and address pool must be in the same subnets), the client that SSL connections are then successfully established for each dynamically distributes
Unappropriated address in one virtual ip address pond.In this way, the client and total point server in physical network just connect into one
Hub-and-spoke configuration LAN in a virtual network, EOI VPN modules become gateway of each client in virtual network.Total point
Server provides the routing management to client Microsoft Loopback Adapter simultaneously.When application service of the client to EOI VPN modules rear end
When any access of device, data packet can all flow through Microsoft Loopback Adapter, EOI VPN modules intercepted data on Microsoft Loopback Adapter by routing
Then these IP packets are encapsulated using ssl protocol, are sent using physical network card by IP packet.Total point server
A virtual local area network is set up on Microsoft Loopback Adapter with client, this virtual LAN carrys out the user of system
Say it is transparent.
Specifically, EoInternet supports two kinds of connection types of tcp and udp, i.e., total point server and client to support tcp
With two kinds of connection types of udp, only the connection type (tcp or udp) used and end need to be pre-defined in server and client side
Slogan, client and server carry out SSL on the basis of this connection and shake hands.Connection procedure include SSL shake hands and it is empty
The network segment on virtual net, address, routing are sent to client by the management information on quasi- network, EoInternet.Successful connection
Afterwards, client and server sets up SSL secure connections, and the data of client and server all flow into Microsoft Loopback Adapter and are SSL's
Processing, then sent from physical network card in the connection of tcp or udp.As shown in Figure 1.
In EoInternet, the processing procedure of data packet is：
Upstream, i.e. user side message IN call the interface of downlink physical network interface card to be passed to core TCP/IP layer by system
It processes, processing routine hard_start_ is sent by being routed to Microsoft Loopback Adapter, the trawl performance of Microsoft Loopback Adapter in TCP/IP
Data packet is added skb tables and completes duplication of the data packet from core space to user area by xmit (), and EoInternet calls virtual
The character processing routine tun_read () of network interface card, reads the data packet in equipment, and ssl protocol is used to the data packet of reading
It after doing encapsulation process, is called by socket systems, is handled through TCP/IP layer, ascending physical signal network interface card is transferred to send.
Downstream, i.e. network side message IN, physical network card received data packet are uploaded to by core TCP/IP
EoInternet, EoInternet are carried out using ssl protocol at unpacking by link_socket_read () received data packet
Reason, treated data packet EoInternet call the character processing routine tun_write () of Microsoft Loopback Adapter that virtual net is written
The character device of card, device driver completes duplication of the data from user area to core space, and writes data into skb chained lists,
Then network interface card netif_rx () is called to receive program, data packet is again introduced into system ICP/IP protocol stack, passes to downlink physical net
On card, it is sent on client-side device.
EoInternet provided in this embodiment is capable of providing two kinds of operating modes of tun and tap.Under tun patterns, from void
What is received on quasi- network interface card is free from physical frame header IP data packets, and SSL processing modules carry out SSL encapsulation to IP packets；In tap patterns
Under, what is received from Microsoft Loopback Adapter is the data packet for including physical frame header, and SSL processing modules carry out SSL envelopes to entire physical frame
Dress.Tap patterns are properly termed as network bridge mode, the physical network that entire virtual network is connected just as bridge mode.This pattern
The data packets such as ethernet frame, IPX, NETBIOS can be transmitted, application range is wider.
Due to EoInternet be realized based on ssl protocol, in application, EoInternet software packages need and
Openssl softwares are installed together, because EoInternet has invoked Openssl function libraries, the client kimonos of EoInternet
The process that SSL links are established at business end is realized by calling Openssl.Data are write by bio_write ()/function
Enter the state machine channel of Openssl, bio_read () reads result from Openssl.EoInternet also calls Openssl's
The data packet of encryption and decryption function processing forward.
To ensure that the safe transmission of data, EoInternet are additionally provided with security mechanism.Specifically, EoInternet takes
The tunnel of secret is set up in the exchange of key keys, encapsulation, ca certifications, rsa cryptographic means on public network, ensures transmission data
Integrality, privacy and validity.
Above-mentioned EoInternet is integrated into an equipment, that is, constitutes communication equipment provided in this embodiment.Profit
Private line of communication can be carried out for net with the communication equipment, and specific method is：
Method one：Short-term private line of communication is for network method
In the case of big customer's special line normal transmission, client branch access device is linked into carrier network domain by optical port
Access net in, data transparency is then transmitted to by the total point of client by operator's transmission network, is realizing set-off private wire circuit just
Often transmission.
When the access sidelight cable of big customer breaks down, at this time if this special line is not protected, business will
It interrupts, while alerting meeting and be reported to network management center, network management center to be notified that repair personnel goes progress failure fixed from access layer network
Position and resume work, and this positioning and resumes work and generally require the long period.
At this point, after client response department is connected to fault ticket, it will can in advance get out a wireless standby network termination equipment belt
To scene, restore client traffic at the first time, repairing optical cable of then making the best use of time immediately switches back into after finally optical cables being waited to restore
Primary circuit.This mode can reduce to big degree the discontented mood of client, can promote client on the contrary and be responded to communication equipment
Good opinion.This is for concrete scheme of net：
As shown in Fig. 2, by above-mentioned communication equipment fault in-situ after the power is turned on, can be automatic and operator room side wireless standby
Build a tunnel EOInternet between net convergence terminal equipment, this tunnel be one can two layers of transparent transmission client with
The too channel of network data, reliability is very high, and the network constructed is felt to be exactly same between allowing client branch-client always to put
It is the same in one LAN.
Method two：Long-term communication special line is for network method
As shown in figure 3, the above-mentioned communication equipment with optical transmit-receive function is disposed in site, and if optical cable breaks down, communication
Equipment can automatically switch to radio channel and be transmitted, by the channels EOInternet that have bridged in advance by data transmission
It is transmitted to business is transparent client onto wireless standby net convergence server, then by MSTP transmission networks and always orders gateway, entire mistake
Journey, client do not perceive service disconnection.
If it is because the non-optical fiber class failure of cable network causes network obstructed, client site personnel can pass through in site
4G is switched on the channels 4G for online toggle switch pressure and carries, and realizes and automatically switches, and promotes perception of the client to network.
Technical scheme of the present invention and advantageous effect is described in detail in above-described specific implementation mode, Ying Li
Solution is not intended to restrict the invention the foregoing is merely presently most preferred embodiment of the invention, all principle models in the present invention
Interior done any modification, supplementary, and equivalent replacement etc. are enclosed, should all be included in the protection scope of the present invention.
Claims (9)
1. a kind of communication means, it is characterised in that：
Realize that the communication unit of the communication means includes at least a Microsoft Loopback Adapter and EoI VPN modules, the communication means packet
It includes：
The upstream data of communication unit is extracted through user oriented physical network card, by ICP/IP protocol routing forwarding to virtual
It after network interface card, is sent in the read list and character device of Microsoft Loopback Adapter, and is copied to from core space in character device
The data packet of user area, user area is read by EoI VPN modules with after SSL encapsulation, and network-oriented is sent to through ICP/IP protocol
The physical network card of side completes upstream data processing；
The downlink data of communication unit, the physical network card through network-oriented side receive, and pass through ICP/IP protocol routing forwarding to EoI
VPN modules are written to the character device of Microsoft Loopback Adapter, the quilt in character device after being parsed using ssl protocol by EoI VPN modules
Core space is copied to from user area, and is written to read list, the data packet in read list is turned through ICP/IP protocol again
It is sent to the physical network card of user oriented side, to be sent on ustomer premises access equipment.
2. communication means as described in claim 1, it is characterised in that：
The communication means provides two kinds of operating modes of tun and tap,
Under tun patterns, IP data packet of the Microsoft Loopback Adapter read-write without physical frame header, EOI VPN modules carry out IP data packets
SSL is encapsulated；
Under tap patterns, Microsoft Loopback Adapter reads and writes the data packet for including physical frame header, and EOI VPN modules carry out entire physical frame
SSL is encapsulated.
3. communication means as claimed in claim 2, it is characterised in that：
The communication means is in Solaris, Linux, OpenBSD, FreeBSD, NetBSD, Mac OS X or Windows
It is run on 2000/XP/Vista.
4. communication means as described in claim 1, it is characterised in that：
Before a communication, the communication unit needs to establish SSL secure connections end to end, between two clients of realization or objective
Communication between family end and the total point of client.
5. communication means as claimed in claim 4, it is characterised in that：
The network segment of Microsoft Loopback Adapter, address and routing are sent to opposite equip. by the EoI VPN modules, to realize both ends client
The SSL secure connections of communication.
6. communication means as described in claim 1, it is characterised in that：
The communication means takes the exchange of key keys, encapsulation, ca certifications, rsa cryptographic means to set up secret on public network
Tunnel.
7. a kind of communication equipment, other cards are：
The communication equipment has the communication means described in claim 1~6.
8. a kind of private line of communication is for network method, it is characterised in that：
Communication equipment described in claim 7 is communicatively coupled with a client device, the other side of communication equipment passes through
4G networks are connect with another client device, to build the logical of two layers of Ethernet data of a transparent transmission between two clients
The communication of two clients is realized in road.
9. private line of communication as claimed in claim 8 is for network method, it is characterised in that：
When the communication equipment detects the fiber optic cable communications exception of client, the data of client transmissions can be received automatically, and will
Transmission data is sent to after backing up and encapsulate in virtual network on 4G networks, through 4G network transmissions to another client.
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Cited By (5)
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| CN109547452A (en) * | 2018-11-30 | 2019-03-29 | 四川安迪科技实业有限公司 | The method and system of TCP Transparent Proxy are realized on Linux bridge equipment |
| CN112260925A (en) * | 2020-09-30 | 2021-01-22 | 厦门汉印电子技术有限公司 | Electronic scale data transmission method, device, equipment and storage medium of virtual network |
| CN113507506A (en) * | 2021-06-23 | 2021-10-15 | 烽火通信科技股份有限公司 | Virtual private network system, method and device for constructing same, and readable storage medium |
| CN114301996A (en) * | 2021-12-10 | 2022-04-08 | 山石网科通信技术股份有限公司 | Transmission data processing method and device |
| CN117560235A (en) * | 2024-01-11 | 2024-02-13 | 南京沁恒微电子股份有限公司 | Automatic network access method and device |
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| CN103812751A (en) * | 2014-02-28 | 2014-05-21 | 成都卫士通信息产业股份有限公司 | SSL VPN (secure sockets layer virtual private network) terminal data interaction method based on NDIS (network driver interface standard) |
| WO2017031954A1 (en) * | 2015-08-25 | 2017-03-02 | 华为技术有限公司 | Data communication method, user equipment, and server |
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