n.防火壁；隔火墻

The proxy firewall maintain context more easily than the packet filter firewall. 代理防火墻比包過濾器防火墻易于保持更多的上下文

The packet filter rout provide the same functionality as the packet filter firewall describe in section2.1.1. 包過濾路由器與包過濾防火墻具有同一功能，如2。1。1部分所述。

Inside of the firewall the only permit destination for traffic from the interior or exterior route is the bastion host. 在防火墻內部，對于來自內外部路由器的通信量來說，唯一允許到達的目的地是bastion主機。

n.防火壁；隔火墻