关键词: 防火墙, Internet, 多级安全, 安全模型, 可信网关

Abstract:

According to the imperative status of network security, the flaws of the firewall system based on rules have been pointed out and the Internet Firewall System with multi-level security has been presented, the multi-level security policy has been used into network access control, and the design and the implement to the system has been made.

Key words: firewall, Internet,multi-level security, security model, trusted gateway