All these filtering ways are mainly executed by setting down detailed and complicated rules . this makes it is excessively dependent on rules , and cannot distinguish the real text meanings , which are the biggest drawbacks . as we know , the information will be filtered when it satisfies the filtering rules , and this cannot satisfy our needs for today ' s applications 这些过滤方式主要通过制定详细繁琐的过滤规则来实现,其特点是实现简单,实时性强? ?这一点对于网络上的应用来说是很重要的;但它的一个最大的缺点就在于过滤过于规则化,无法辨别文档实际含义,只要满足过滤规则就会被过滤掉,无法满足现在过滤需求。
In this system the packet filtering rules are controlled intelligently by combining the intelligent mechanism with the package filtering mechanism ; to the proxy server , we develop a ftp proxy server decrypting witch with petri net model ; lastly , otp authentication are applied in authentication server 其中,本文将智能机制与包过滤机制相结合,通过推理机和知识库对包过滤规则进行智能化控制,实现了智能型包过滤路由器;在代理服务器部分,本文引入petri网模型对ftp代理服务器功能进行形式化描述并给出其具体设计方案;最后,本文将一次性口令系统运用于认证服务器,并对其进行了详细的设计。
The system not only sends filter rules to every msp ( mail service provider ) ’ s spam filter system , but also accepts spam samples from the spam filter systems of msp . because of the share of filter rules and filter policies , it can reduce total cost of anti - spam system 它一方面可以将邮件过滤规则下发给各邮件服务提供商msp ( mailserviceprovider )的反垃圾邮件系统,一方面可以接收来自各msp的反垃圾邮件系统提供的垃圾邮件样本,以实现规则、策略的共享和降低反垃圾邮件的整体成本。