英语翻译防火墙技术的核心思想是在不安全的网际网环境中构造一个相对安全的子网环境.本文介绍了防火墙技术的基本概念和系统结构

The core thought of[with] the fire wall technique is the son net environment that constructs an opposite safety in the net net environment in insecurity.This text introduced the fire wall technical basic concept and the system structure,discussing to carry out two kinds of main technique meanses of the fire wall:The a kind of is according to the set of the cent percolation technique(the Packet filtering),its representative is sieve a router up the fire wall function of the realization;The a kind of is according to act for a technique(Proxy),its representative is the fire wall function that closes a realization in the applied layer net.