基于DNS Blocklist的反垃圾邮件系统的设计与实现

垃圾邮件浪费网络资源、干扰个人通讯、威胁着网络安全,甚至存在着盗用资源和散布谣言等问题,因此引起了全社会的广泛关注。但针对迅速增长的垃圾邮件,国内还缺乏相应的主动的控制机制。笔者研制了一个基于DNSBlocklist的过滤系统,该系统通过采用DNS技术、Openrelay测试技术以及基于策略的分级过滤规则技术实现了在整个教育网内的垃圾邮件过滤。用户可以根据需要,选择相应的过滤规则,有效地屏蔽已知来源的垃圾邮件。该文介绍了系统的结构和主要实现技术。

Design and Implementation of an Anti-Spam System Based on DNS Blocklist

Spam is wasting the Internet resources,interrupting people's communication,threatening the network security.Even more,it often goes with stealth of resource and rumors.Thus it gets attention of the whole society recently.However,there is still no active control system available in China.Here authors build a filtration system based on DNS Blocklist using the technique of DNS,Open relay test and the grading filtration rule based on policy which can efficiently prevent the spam in CERNET.Users can choose the rules based on their policy to filter the known spam source.This paper introduces the architecture of system and its chief implementation techniques.