Method and device for achieving unicast reverse path forwarding

A reverse transmission, address technology, applied in the field of communication

Inactive Publication Date: 2010-03-03
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] However, the current IPv6 network lacks the technology to ...

Method used

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  • Method and device for achieving unicast reverse path forwarding
  • Method and device for achieving unicast reverse path forwarding
  • Method and device for achieving unicast reverse path forwarding

Examples

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Embodiment Construction

[0028] Functional Overview

[0029] In an IPv6 network, a router interface will periodically publish an announcement message including link prefix, link MTU (Maximum Transmission Unit, maximum transmission unit), public network route and other information. The broadband access device can obtain the routing information of the router interface by listening to this message, so as to implement source address filtering control based on the IPv6 network on the broadband access device.

[0030] The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0031] method embodiment

[0032] According to an embodiment of the present invention, a uRPF implementation method is provided.

[0033] The realization method of uRPF according to the ...

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Abstract

The invention discloses a method and a device used for realizing unicast reverse path forwarding of an IPv6 network, wherein the method comprises the following steps: an access device intercepts or acquires public messages from a router, wherein address prefix information is carried by the public messages; the access device establishes a prefix table according to the acquired address prefix information; and the access device receives access request messages from a user-side device, judges whether a source IP address of the access request messages is in the prefix table or not and determines whether to forward the messages to the router or not according to the judging result. The invention can realize address filteration and control in the access device.

Description

technical field [0001] The present invention relates to the communication field, in particular to a method and device for realizing Unicast Reverse Path Forwarding (uRPF for short). Background technique [0002] In the network attack of forged source address, the hacker machine sends a large number of TCP (Transmission Control Protocol, Transmission Control Protocol) SYN messages with forged source address to the victim host, occupying the NAT (Network Address translation, Network Address Translation) session resources of the security gateway, Eventually, the NAT session table of the security gateway will be full, causing everyone in the LAN to be unable to access the Internet. [0003] uRPF is an effective measure to enhance routing security, and it mainly prevents network attacks based on source address spoofing. uRPF uses the following data packet forwarding mechanism: when the router (Router) receives a data packet, it checks the routing table to determine whether the r...

Claims

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Application Information

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IPC IPC(8): H04L12/56H04L29/06
CPCH04L45/741H04L63/101H04L45/36H04L45/00
Inventor 孙鹏詹喻平
Owner ZTE CORP
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