【摘要】 给出了一种分布式邮件监控系统的设计和实现方案。该方案的实现建立在Linux防火墙的基础上。采用了Netfilter构架中的ip_queue机制获取流经网关的邮件,根据SMTP和POP3的协议特点提取邮件内容,利用文本分类技术对邮件内容进行监控。系统中广泛地使用了插件机制,明确地划分了实时处理和离线分析两大类操作的界限。针对文本分类器的特点,系统定义了简明的接口,使不同算法的分类器可以方便地整合到系统当中来。该方案的实施可以有效地监控流经网关的邮件。更多还原

【Abstract】 The design and implementation scheme of a distributed email monitoring system are presented,which is based on Linux fir-ewall.The ip_queue module in Netfilter structure is adopted to obtain emails from gateway,and email content is extracted according to SMTP and POP3 protocols.Text categorization technique is utilized to monitor email content.Plug-ins is widely used in the system,and real-time processing and off-line analysis are compartmentalized definitely.According to the characters of text categorizer,com-pendious interfaces are defined,which could integrate categorizers via various algorithms into the system conveniently.Application shows that the system could monitor emails effectively.更多还原