刍议计算机网络安全之防火墙

Discussion on Computer Network Security Firewall

网络安全已成为人日益关心的问题,而网络防火墙是一种隔离控制技术,通过预定义的安全策略,对内外网通信强制实施访问控制,防火墙较常用的技术有应用网关、状态检测、包过滤等技术。在保护内部网络安全的前提下:其主要作用是在网络入口外检查网络通信,设定用户的安全规则,提供内部网络的安全,保障内外网络通信。

Network security has become a man of growing concern to the network firewall is an isolation control technology, through a predefined security policy to enforce access control,internal and external network communication,and more commonly used firewall technology application gateway, stateful inspection,and packet filtering technology.Under the premise of protecting the internal network security：its main role is to check the network traffic in the network outside the entrance,set the user＇s security rules,internal network security, to protect internal and external network communication.