New Firewall Based-on Content Filtering And Recurrence

Today Internet rapidly developed and at large applied, problem of network security was increasingly paid attention to. Though product of network security such as firewall and virtual private network improve capability of network security to the extent, it is helpless for it to monitor and filter the transmitted content Mobile code, Email virus and non-pure network environments challenge network security. The importance of network security become obvious. In this paper, on the base of comparing traditional packet filter and application proxy and analyzing relationship between them and content security, we put forward resolving scheme of content security of content filtering and recurrence. The scheme use mostly application proxy technology, taking safety packet filtering precautions in the network layer and taking effective control. In the end, we deal mainly with content filtering and recurrence.