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Method and device for forced forwarding of arp message by media access control

A technology of media access control and ARP message, which is applied in the field of forced forwarding of ARP message in media access control, which can solve the problems of conflict detection function and sacrificing IP address, and achieve the effect of improving security and avoiding ARP spoofing attack

Active Publication Date: 2016-04-20
XINHUASAN INFORMATION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In fact, this conflict does not necessarily exist. Existing MFF equipment can solve the problem of misjudgment of IP address conflicts, but sacrifices the detection function of IP address conflicts.

Method used

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  • Method and device for forced forwarding of arp message by media access control
  • Method and device for forced forwarding of arp message by media access control
  • Method and device for forced forwarding of arp message by media access control

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Embodiment Construction

[0055] In order to make the purpose, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0056] refer to figure 2 , which shows a flow chart of Embodiment 1 of a method for forcibly forwarding an ARP message by media access control according to an embodiment of the present invention, which may specifically include:

[0057] Step 201, receiving an ARP request message;

[0058] Step 202, when the ARP request message is not an ARP message requesting a gateway or server, transform the sender MAC address of the ARP request message into a gateway MAC address, and broadcast and send the transformed ARP request message;

[0059] Step 203, create a session table entry, and record the sender IP, sender MAC address and target IP of the ARP request message in the session table entry;

[0060] The embodiment of the present invention ...

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Abstract

The invention provides a method and a device for media access control forced forwarding of an address resolution protocol (ARP) message. The method specifically includes that when an ARP request message is not an ARP message of a request gateway or a server, a sending end media access control (MAC) of the ARP request message is transformed to be a gateway MAC, and the ARP request message is sent in a broadcast mode; entries of a session table are established, and information of the ARP request message is recorded in the entries of the session table; and a sending end internet protocol (IP) and a target IP of an ARP response message are matched with a target IP and a sending end IP in the entries of the session table, when the matching result is successful and the ARP response message is not an ARP message of a response gateway or a server, a sending end MAC of the ARP response message is transformed to be a gateway MAC and a target MAC of the ARP response message is transformed to be a sending end MAC in the entries of the session table which is successfully matched, and the ARP response message is sent in an unicast mode. By means of the method and the device, IP address conflict in the network can be accurately and effectively detected.

Description

technical field [0001] The invention relates to the technical field of Ethernet forwarding, in particular to a method and device for forwarding ARP messages forcibly by media access control. Background technique [0002] MFF (Media Access Control Forced Forwarding, Media Access Control Forced Forwarding) is a solution that can make full use of the broadcast domain advantages of Ethernet without wasting IP addresses and limiting scale. [0003] The MFF-enabled device (hereinafter referred to as the MFF device) intercepts the client's ARP (Address Resolution Protocol, Address Resolution Protocol) request message, and through the ARP proxy mechanism, replies with an ARP reply message with the MAC address of the gateway at the sending end. In this way, the client can be forced to send all traffic (including traffic in the same subnet) to the gateway, so that the gateway can monitor data traffic, prevent malicious attacks between clients, and better ensure the security of network...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/911H04L29/12
Inventor 韩冰任晓军
Owner XINHUASAN INFORMATION TECH CO LTD
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