CN106254569A - A kind of IP distribution method based on SDN - Google Patents
A kind of IP distribution method based on SDN Download PDFInfo
- Publication number
- CN106254569A CN106254569A CN201610607488.3A CN201610607488A CN106254569A CN 106254569 A CN106254569 A CN 106254569A CN 201610607488 A CN201610607488 A CN 201610607488A CN 106254569 A CN106254569 A CN 106254569A
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- Prior art keywords
- sdn
- dhcp
- dynamic host
- protocol server
- host configuration
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L61/00—Network arrangements, protocols or services for addressing or naming
- H04L61/50—Address allocation
- H04L61/5007—Internet protocol [IP] addresses
- H04L61/5014—Internet protocol [IP] addresses using dynamic host configuration protocol [DHCP] or bootstrap protocol [BOOTP]
-
- 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
- H04L63/08—Network architectures or network communication protocols for network security for authentication of entities
-
- 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
- H04L63/14—Network architectures or network communication protocols for network security for detecting or protecting against malicious traffic
- H04L63/1441—Countermeasures against malicious traffic
- H04L63/1466—Active attacks involving interception, injection, modification, spoofing of data unit addresses, e.g. hijacking, packet injection or TCP sequence number attacks
-
- 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
- H04L63/14—Network architectures or network communication protocols for network security for detecting or protecting against malicious traffic
- H04L63/1441—Countermeasures against malicious traffic
- H04L63/1491—Countermeasures against malicious traffic using deception as countermeasure, e.g. honeypots, honeynets, decoys or entrapment
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- Engineering & Computer Science (AREA)
- Computer Security & Cryptography (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Computer Hardware Design (AREA)
- Computing Systems (AREA)
- General Engineering & Computer Science (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
Abstract
The invention discloses a kind of IP distribution method based on SDN, the method is when described Dynamic Host Configuration Protocol server receives the IP distribution request from described SDN, a return information is sent to described SDN switch, described return information is forwarded to described SDN controller by described SDN switch, described SDN controller is according to this return information, the legitimacy of described Dynamic Host Configuration Protocol server is verified, after being verified, described SDN controller notice SDN switch forwards described return information, such that it is able to automatically identify in SDN whether have pseudo-Dynamic Host Configuration Protocol server.
Description
Technical field
The present invention relates to SDN technical field, particularly relate to a kind of IP distribution method based on SDN.
Background technology
If network has the Dynamic Host Configuration Protocol server privately arranged, when client terminal application IP address, will be with broadcast packet
Form send DHCP Discover message, in network, all of Dynamic Host Configuration Protocol server all can provide response, sends DHCP Offer
Message.Client terminal can only process one of them DHCP Offer message, processes the DHCP Offer message received at first.If
The DHCP Offer message received is that the Dynamic Host Configuration Protocol server privately arranged sends, and may result in client and obtains the IP ground of mistake
Location.This Dynamic Host Configuration Protocol server set up illegally is referred to as pseudo-Dynamic Host Configuration Protocol server.
The pseudo-Dynamic Host Configuration Protocol server detection technique of legacy network is to configure trusted port and non-on forward node in a network
The Dynamic Host Configuration Protocol server of trusted port, only trusted port can provide DHCP service to network.For non-trusted port, up
Dynamic Host Configuration Protocol server message will be intercepted, make client will not obtain IP by the Dynamic Host Configuration Protocol server on non-trusted port, to ensure
The IP of client is distribution on the legal Dynamic Host Configuration Protocol server from the trusted port specified.Traditional pseudo-Dynamic Host Configuration Protocol server inspection
Survey technology is local, and needing the port configuring every switch is trusted port or non-trusted port, therefore configures work
Complicated and loaded down with trivial details, and whole DHCP pseudo server detection technique is based on switch ports themselves, and Control granularity is the thickest.
SDN (Software Defined Network, software defined network) is a kind of emerging network based on software
Framework and technology, its core technology is OpenFlow technology.Core technology OpenFlow of SDN is by by network equipment key-course
Separating with data Layer, SDN controller can be to whole real-time performance centralized Control.But in the prior art of SDN, still do not have
There is scheme can realize the detection method of pseudo-Dynamic Host Configuration Protocol server in network.
Therefore, how in SDN, to detect pseudo-Dynamic Host Configuration Protocol server simply and effectively, be that those skilled in the art of the present technique are general
All over the problem paid close attention to.
Summary of the invention
In consideration of it, it is an object of the invention to provide a kind of IP distribution method based on SDN, in order to automatically to SDN
In Dynamic Host Configuration Protocol server verify.
According to foregoing invention purpose, the present invention proposes a kind of IP distribution method based on SDN, described SDN bag
Include customer side and network side, described network side include some SDN switch, at least one SDN controller and at least one
Dynamic Host Configuration Protocol server, it is characterised in that
When described Dynamic Host Configuration Protocol server receives the IP distribution request from described SDN, send to described SDN switch
One return information, described return information is forwarded to described SDN controller by described SDN switch, and described SDN controller is according to being somebody's turn to do
Return information, verifies the legitimacy of described Dynamic Host Configuration Protocol server, after being verified, and the notice SDN exchange of described SDN controller
Machine forwards described return information.
Preferably, the return information that described DHCP sends is based on the DHCP offer message under DHCP protocol.
Preferably, described proof procedure specifically includes:
MAC Address and the IP address of all legal Dynamic Host Configuration Protocol server in this SDN it is configured with in SDN controller；
Described SDN controller resolves the described DHCP offer message that described SDN switch sends, and obtains this DHCP
Source MAC in offer message and source IP address；
Described SDN controller according to described source MAC and source IP address, and with the conjunction of configuration in described SDN controller
MAC Address and the IP address of method Dynamic Host Configuration Protocol server are mated；
If the match is successful, then decision verification passes through；Otherwise, it is determined that checking is not passed through.
Preferably, obstructed out-of-date in checking, described SDN controller notifies that described SDN switch abandons described return information.
Preferably, before described return information is forwarded to described SDN controller by described SDN switch, exist according to SDN agreement
The forwarding rule of described DHCP offer message inquired about by the local stream table of this SDN switch；
When stream table successful inquiring, then according to the configuration in stream table, this DHCP message is performed corresponding action；
When stream table inquiry is unsuccessful, then described DHCP offer message is transmitted to described SDN controller.
Preferably, after described DHCP offer message successfully forwards in described SDN, described Dynamic Host Configuration Protocol server
A DHCP ACK message is replied always according to the DHCP Request message from described SDN.
Preferably, DHCP ACK message is forwarded to described SDN controller, described SDN controller root by described SDN switch
According to this DHCP ACK message, verifying the legitimacy of described Dynamic Host Configuration Protocol server, after being verified, described SDN controller leads to
Know that SDN switch forwards DHCP ACK message.
Preferably, when checking is obstructed out-of-date, and described SDN controller produces an alarm notification network manager.
Compared with prior art, a kind of IP distribution method based on SDN of the present invention, have the advantages that SDN
Switch sends DHCP message and verifies this DHCP message to SDN controller, SDN controller, can be automatic by checking
Identify the existence whether having pseudo-Dynamic Host Configuration Protocol server in network, and notify network manager in alarm mode；This verification method letter
Single and efficient, it is not necessary to complicated configuration.
Accompanying drawing explanation
Fig. 1 is the verification method flow chart of one specific embodiment of the present invention；
Fig. 2 is the SDN system structure schematic diagram of one embodiment of the invention；
Detailed description of the invention
Mention as in background technology how in SDN, to detect pseudo-Dynamic Host Configuration Protocol server simply and effectively, be this skill
Art skilled person's question of common concern.
Therefore the present invention receives the return information from the Dynamic Host Configuration Protocol server in SDN by SDN switch, and will
This return information is forwarded to SDN controller, and the legitimacy of this Dynamic Host Configuration Protocol server, according to this return information, is carried out by SDN controller
Checking, such that it is able to whether with the presence of pseudo-Dynamic Host Configuration Protocol server in simple efficient detection SDN.
Below by way of specific instantiation accompanying drawings embodiments of the present invention, those skilled in the art can
Further advantage and effect of the present invention is understood easily by content disclosed in the present specification.The present invention also can be different by other
Instantiation implemented or applied, the every details in this specification also can based on different viewpoints and application, without departing substantially from
Various modification and change is carried out under the spirit of the present invention.
In implementation process, SDN includes customer side and network side, and this network side includes some SDN switch, at least
One SDN controller and at least one Dynamic Host Configuration Protocol server, when in SDN, client terminal broadcasts an IP distribution request, should
When Dynamic Host Configuration Protocol server in network receives from IP distribution request, then the SDN switch in network sends a return information.
This return information is forwarded to SDN controller by SDN switch, and SDN controller is according to this return information, to this Dynamic Host Configuration Protocol server
Legitimacy is verified, after being verified, SDN controller notice SDN switch forwards this return information.
In one embodiment, the return information that DHCP sends is based on the DHCP offer message under DHCP protocol.
Fig. 1 is the verification method flow chart of one specific embodiment of the present invention.As it is shown in figure 1, this authenticated one-tenth specifically includes:
Step S1: be configured with MAC Address and the IP of all legal Dynamic Host Configuration Protocol server in this SDN in SDN controller
Address；
Step S2:SDN controller resolves the DHCP offer message that SDN switch sends, and obtains this DHCPoffer message
In source MAC and source IP address；
Step S3:SDN controller according to source MAC and source IP address, and with the legal DHCP of configuration in SDN controller
MAC Address and the IP address of server are mated；
Step S4: if the match is successful, then decision verification passes through；Otherwise, it is determined that checking is not passed through.
Also included before step S2:
Inquire about the forwarding rule of this DHCP offer message at the local stream table of this SDN switch according to SDN agreement；
When stream table successful inquiring, then according to the configuration in stream table, this DHCP message is performed corresponding action；
When stream table inquiry is unsuccessful, then this DHCP offer message is transmitted to described SDN controller.
In this specific embodiment, in SDN, user configures at least one Dynamic Host Configuration Protocol server as required, for dividing
Join IP address.In SDN controller, configure MAC Address and the IP address of this legal Dynamic Host Configuration Protocol server.Such as, at SDN controller
In be provided with an allocation list, the configuration item of this table includes MAC Address and the IP address of legal Dynamic Host Configuration Protocol server, wherein configuration item such as table
Shown in 1.Table 1 is the configuration item of legal Dynamic Host Configuration Protocol server in SDN controller.
Table 1 is the configuration item of SDN controller.
| Configuration item | Describe |
| Dynamic Host Configuration Protocol server authentication function | Open and close Dynamic Host Configuration Protocol server authentication function |
| Dhcp server ip address | Specify legal dhcp server ip address |
| Dynamic Host Configuration Protocol server MAC Address | Specify legal Dynamic Host Configuration Protocol server MAC Address |
For SDN, if need to detect, the Dynamic Host Configuration Protocol server in network depending on particular situation
Depending on, whether such as network management personnel, when having pseudo-Dynamic Host Configuration Protocol server in needs monitoring network, it is possible to by SDN control
Dynamic Host Configuration Protocol server authentication function opened by device.
In this specific embodiment, when client terminal application IP address in SDN, will be with the form of broadcast packet
Sending DHCP Discover message, the Dynamic Host Configuration Protocol server in network all can provide response, sends DHCP Offer message, and
The field of DHCP Offer message there is Dynamic Host Configuration Protocol server be supplied to the IP address of client terminal.SDN switch receives DHCP clothes
After the DHCP Offer message that business device sends, in the stream table of this locality, target MAC (Media Access Control) address and purpose IP address according to message are carried out
Inquiry, if having, then processes this DHCP Offer message according to action command in stream table accordingly, if not having, then will
DHCP Offer message sends to SDN controller.
In this specific embodiment, SDN controller receives the DHCP Offer message that SDN switch sends, and obtains DHCP
Source MAC and source IP address in message；Then according to this source MAC and source IP address, configuration in coupling SDN controller
The MAC Address of legal Dynamic Host Configuration Protocol server and IP address.If mating unsuccessful, then SDN controller configure in the field of stream table right
The action command of this DHCP Offer message is " abandoning ", and issues stream table entering to this DHCP Offer message forwarding path
Mouth SDN switch.After entrance SDN switch receives stream table, according to the action command in this stream table, this DHCP Offer is reported
Literary composition abandons.SDN controller produces an alarm notification network manager simultaneously, to illustrate that this Dynamic Host Configuration Protocol server is pseudo-DHCP service
Device.If the match is successful, then this DHCP Offer message is that Dynamic Host Configuration Protocol server legal in network sends, then SDN controller exists
The action command configuring this DHCP Offer message in the field of stream table is " forwarding ", and issues stream table to DHCP Offer message
Forward-path on SDN switch.This DHCP Offer message is forwarded to by SDN switch according to the forward-path in stream table
Client terminal.
In this specific embodiment, after client terminal receives this DHCP Offer message and correspondingly process, process
After completing, client sends the message of the DHCP Request of a broadcast eventually in SDN, at DHCP Request message
Field in have Dynamic Host Configuration Protocol server that client terminal chooses IP address and the IP address that oneself needs.DHCP in SDN
After server receives this message, can judge that the IP address in DHCP Request message is the most identical with the IP address of oneself,
If differing, then Dynamic Host Configuration Protocol server does not processes；If identical, then Dynamic Host Configuration Protocol server sends DHCP ACK message in network
SDN switch, and in the field of message increase IP address rental period information.After SDN switch receives DHCP ACK message,
Similarly make the proof procedure the same with DHCP Offer message.If after being verified, SDN switch is according to turning in stream table
Send out path, this DHCP ACK message is forwarded to client terminal.After client terminal receives this DHCP ACK message, obtain DHCP
The IP address of server-assignment.
To sum up, the present invention receives the return information from the Dynamic Host Configuration Protocol server in SDN by SDN switch, and
This return information is forwarded to SDN controller, and the legitimacy of this Dynamic Host Configuration Protocol server, according to this return information, is entered by SDN controller
Row checking, thus whether centralized detecting network exists in SDN controller pseudo-Dynamic Host Configuration Protocol server, at the SDN of user side inlet
Switch has stopped the access of pseudo-Dynamic Host Configuration Protocol server, and whole implementation method is simple and efficient.
Below, the SDN system with function of the present invention will be described in detail.
Refer to the SDN system structure schematic diagram that Fig. 2, Fig. 2 are one embodiment of the invention.As in figure 2 it is shown, SDN
Network includes some SDN switch and SDN controller and user configured at least one Dynamic Host Configuration Protocol server, some SDN switch
Constitute data each node in network transmits.When in SDN, client terminal broadcasts an IP distribution request, SDN net
When Dynamic Host Configuration Protocol server in network receives from IP distribution request, then the SDN switch in SDN sends a reply letter
Breath.This return information is forwarded to SDN controller by SDN switch, and SDN controller is according to this return information, to this DHCP service
The legitimacy of device is verified, after being verified, SDN controller notice SDN switch forwards this return information.If checking does not has
Passing through, SDN controller notice SDN switch loses this return information.
In sum, a kind of IP distribution method based on SDN of the present invention, based on SDN, can be simple and efficient
Pseudo-Dynamic Host Configuration Protocol server in detection network, need not complicated loaded down with trivial details configuration.
Above-described embodiment all can be repaiied by any those skilled in the art under the spirit and the scope of the present invention
Decorations and change.Therefore, the scope of the present invention, should be as listed by claims.
Claims (9)
1. an IP distribution method based on SDN, described SDN includes customer side and network side, described network side bag
Include some SDN switch, at least one SDN controller and at least one Dynamic Host Configuration Protocol server, it is characterised in that
When described Dynamic Host Configuration Protocol server receives the IP distribution request from described SDN, send one time to described SDN switch
Complex information, described return information is forwarded to described SDN controller by described SDN switch, and described SDN controller is according to this reply
Information, verifies the legitimacy of described Dynamic Host Configuration Protocol server, and after being verified, described SDN controller notice SDN switch turns
Send out return information described.
A kind of IP distribution method based on SDN, it is characterised in that described DHCP sends
Return information is based on the DHCP offer message under DHCP protocol.
A kind of IP distribution method based on SDN, it is characterised in that: described proof procedure has
Body includes:
MAC Address and the IP address of all legal Dynamic Host Configuration Protocol server in this SDN it is configured with in SDN controller；
Described SDN controller resolves the described DHCP offer message that described SDN switch sends, and obtains this DHCP offer report
Source MAC in literary composition and source IP address；
Described SDN controller according to described source MAC and source IP address, and with configuration legal in described SDN controller
MAC Address and the IP address of Dynamic Host Configuration Protocol server are mated；
If the match is successful, then decision verification passes through；Otherwise, it is determined that checking is not passed through.
4. a kind of based on SDN the IP distribution method as described in claim 1 or 3, it is characterised in that do not pass through in checking
Time, described SDN controller notifies that described SDN switch abandons described return information.
A kind of IP distribution method based on SDN, it is characterised in that described SDN exchanges
Before described return information is forwarded to described SDN controller by machine, inquire about at the local stream table of this SDN switch according to SDN agreement
The forwarding rule of described DHCP offer message；
When stream table successful inquiring, then according to the configuration in stream table, this DHCP message is performed corresponding action；
When stream table inquiry is unsuccessful, then described DHCP offer message is transmitted to described SDN controller.
A kind of IP distribution method based on SDN, it is characterised in that as described DHCP
After offer message successfully forwards in described SDN, described Dynamic Host Configuration Protocol server is always according to from described SDN
DHCP Request message replys a DHCP ACK message.
A kind of IP distribution method based on SDN, it is characterised in that described SDN switch will
DHCP ACK message is forwarded to described SDN controller, and described DHCP, according to this DHCP ACK message, is taken by described SDN controller
The legitimacy of business device is verified, after being verified, described SDN controller notice SDN switch forwards DHCP ACK message.
A kind of IP distribution method based on SDN, it is characterised in that when checking is obstructed out-of-date,
Described SDN controller produces an alarm notification network manager.
A kind of IP distribution method based on SDN, it is characterised in that also wrap before described checking
Include the function opening Dynamic Host Configuration Protocol server legitimate verification in SDN controller.
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| CN201610607488.3A CN106254569A (en) | 2016-07-28 | 2016-07-28 | A kind of IP distribution method based on SDN |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107046585A (en) * | 2017-03-30 | 2017-08-15 | 百富计算机技术（深圳）有限公司 | Dynamic Host Configuration Protocol server system of selection and device |
| CN107613044A (en) * | 2017-10-26 | 2018-01-19 | 郑州云海信息技术有限公司 | The method and apparatus of virtual machine IP address is updated in a kind of SDN |
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