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Method for accelerating packing filter

A technology for packet filtering and filtering, which is applied in the field of accelerated packet filtering and can solve problems such as cost

Inactive Publication Date: 2005-07-27
ICP ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In contrast, it means that most search algorithms spend most of the search cost such as time on packets that do not need to be filtered at all

Method used

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  • Method for accelerating packing filter
  • Method for accelerating packing filter
  • Method for accelerating packing filter

Examples

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Embodiment Construction

[0028] please see figure 1 According to a method of accelerating packet filtering according to a preferred embodiment of the present invention, a search filter (search filter) 24 is used in a network security device such as a firewall 20, so as to cooperate with the preset multiple Firewall rule 22 for packet filtering works. The aforementioned firewall 20 can be as figure 1 The shown connection is between an Internet (Internet) 10 and a local area network system (LAN) 30, so as to filter all external packets transmitted through the Internet 10, and wherein the filtered packets without problems can enter the LAN System (LAN) 30.

[0029] Utilize the principle of aforementioned search filter, the method for accelerating packet filtering of the present invention, comprises as follows:

[0030] 1. A method to generate a mask characteristic value set of all network segments to be filtered:

[0031] (1) Preconditions:

[0032] (a) hypothesis figure 1 The firewall 20 shown has...

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Abstract

The method includes following steps: based on rules of fire wall, the characteristic value aggregate of network address field needing to filter appears on first hash space; based on characteristic value aggregate of net address of received packet appearing on second hash space, the specific Boolean operation is made for the first hash space and second hash space with same size; if the result indicates that the characteristic value aggregate of the packet is not in the range of characteristic value aggregate of the net address field, then the packed will be permitted to pass through the firewall.

Description

technical field [0001] The invention relates to a method for accelerating packet filtering, in particular to a method for assisting a firewall to accelerate filtering of packets by adopting the principle of search filter. Background technique [0002] At present, with the rapid development of network technology, a large amount of data can be transmitted between all parts of the world in an instant, but relatively, how to improve network security has become an extremely important issue. In a general complete network system, some network devices connected to the network backbone Such as virtual private channel network (VPN), gateway (GATEWAY) or router (ROUTER), etc., most of them have network firewall (FIREWALL) or even independent settings. The design of this type of network firewall mainly focuses on the protection of the network layer (IP Layer), that is, to provide a packet filter mechanism. The principle is to use each firewall rule (FIREWALL RULE) preset by the user. T...

Claims

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Application Information

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IPC IPC(8): H04L12/24H04L29/00
Inventor 吕致中
Owner ICP ELECTRONICS
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