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Method and device for processing offline message

A processing method and message technology, applied in the field of communication, can solve problems such as offline, illegal offline of legal users, PPPoE network security threats, etc., and achieve the effect of improving security

Active Publication Date: 2014-09-10
NEW H3C TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, as long as the attacker knows the session ID, the MAC address of the BRAS, and the MAC address of the user terminal, the attacker can impersonate the user terminal and send a PPPoE offline message to the BRAS, or fake the BRAS to send a PPPoE offline message to the user terminal, resulting in legitimate User is offline
Therefore, in the existing PPPoE network, there is a risk that legal users will be illegally logged off, and the PPPoE network has serious security threats.

Method used

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  • Method and device for processing offline message
  • Method and device for processing offline message
  • Method and device for processing offline message

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Embodiment Construction

[0017] Aiming at the problems existing in the prior art, the embodiment of the present invention provides a method for processing an offline message, which is applied to an access switch connected between a user terminal and a BRAS. by figure 1 For the application scenario of the embodiment of the present invention, the PPPoE network includes a user terminal, a BRAS, and an access switch connected between the user terminal and the BRAS, and the networking of the PPPoE network is suitable for broadband access scenarios such as residential quarters. Assuming that user terminal A is a legitimate user and user terminal B is an attacker, the port connecting the access switch to user terminal A is port 1, the port connecting the access switch to the BRAS is port 2, and the port connecting the access switch to user terminal B is port 1. The port is port 3, the MAC address of user terminal A is 00-00-00-00-00-01, and the MAC address of the BRAS is 00-00-00-00-00-02. As shown in Table...

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PUM

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Abstract

The invention discloses a method and a device for processing an offline message. The method comprises the following steps of: intercepting the offline message by an access switch, and judging whether the offline message is about to trigger the migration of an MAC address table entry while intercepting the offline message; if the offline message is about to trigger the migration of the MAC address table entry, then discarding the offline message and prohibiting the offline message to trigger the migration of the MAC address table entry by the access switch; or else, forwarding the offline message by the access switch.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a method and device for processing offline messages. Background technique [0002] Such as figure 1 As shown, it is a schematic diagram of a PPPoE (Point to Point over Ethernet, point-to-point protocol on Ethernet) network, and each user terminal is connected to a BRAS (Broadband Remote Access Server, broadband remote access server) through an access switch , and the BRAS provides Internet access services for each user terminal, and implements functions such as control, authentication, and accounting for each user terminal. [0003] In the PPPoE network, the session establishment process between the user terminal and the BRAS includes: the user terminal broadcasts a PADI (PPPoE Active Discovery Initiation, PPPoE Active Discovery Initiation) message; after the BRAS receives the PADI message, it responds to the user terminal with a PADO (PPPoE Active Discovery Offer, PPPoE...

Claims

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Application Information

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IPC IPC(8): H04L12/741H04L12/935H04L45/74H04L49/111
Inventor 任晓军
Owner NEW H3C TECH CO LTD