英语翻译A firewall is a standalone process or a set of integrate

英语翻译
A firewall is a standalone process or a set of integrated process that runs on a router or server to control the flow of network data.Typically,firewalls are placed network such as the Interint.
The firewalls act as security polices.With them the administrators will know the answers about the following questions:
Who's been using my network:
What were they doing on my network?
What were they using my network?
What were they going on my network?
Who failed to enter my network?
Generally,there are there types of firewall implementations.Some of them can be used together to create a more secure environment.These implementations are:packet filtering,application proxies,and circuit-level proxies (or generic-application proxies).
Packet filtering is often implemented in the router inself.Application proxies,on the other hand,usually run on standalone servers.Proxy services take a different approach.
Consider your network data a little package that you to deliver somewhere.This data could be part of an e-mail,file transfer,etc.White packet filtering,you have access to deliver the package yourself.The packet filter acts like a traffic bus.It analyzes where you are going and what you are bringing with you.However,the packet filter does not open the data package.
Most commercial routers have some kind of built-in packet filtering capability.However,some routers that are controlled by ISPs may not offer administrators the ability to control the configuration of the router.In those cases,administors may choose to use a standalone packet filter behind the router.
To understand the application proxy,consider the case you need to dliver your little package of network data somewhere.With application level proxies,the process is similar,but now you need to rely on someone else to deliver the packager for you.The rules of packet filtering are suit for application proxy also.But you cannot deliver the package over the agent.Someone will do it for you,but the agent needs to examine the content of the package.If the agent has the permission to deliver the content,your package will be delivered.
As with application level proxies,you need to rely on someone else to deliver the package for you.But the difference is that if these circuit-level proxies have access to deliver the package to your destination,they will do.They will do.They needn't to konw the content inside your package.

防火墙是一个独立的过程,或者一套综合的过程,它是一个路由器或服务器 控制进出网络的数据. 一般来说,防火墙是网络设置等interint . 防火墙作为安全政策. 与他们的管理者都知道答案了下列问题:谁被利用我的网络: 他们的目的是什么就做我的网络? 他们的目的是什么,我用网络? 究竟是怎么对我的网络? 那些未能进入我的网络? 一般来说,有类型的防火墙实现. 有些人可以一起使用,以创造一个更安全的环境. 这些实现:包过滤,应用代理,电路级委托书(或非专利申请委托书) . 包过滤实施通常是在路由器inself . 申请委托书,但在另一方面,通常运行在独立的服务器. 代理服务采取不同的方法. 考虑你的网络数据的一个小包装,你把某处. 这个数据可作为电子邮件,文件传输等白纸包过滤 你已进入交付包装自己. 包过滤行为就像一个交通巴士. 它分析,要到哪里去,你都带着你. 但是,包过滤不公开的数据包. 大多数商业路由器有某种内在的包过滤能力. 不过, 一些路由器所控制的供应商不得提供管理员控制能力的配置中的路由器. 在这种情况下,管理队伍,可以选择使用一个独立的包过滤后面的路由器. 了解应用代理,我们认为如果你需要你dliver小包装网数据某处. 与应用层代理,过程也类似, 但现在你必须要依赖别人把包装给你. 规则的数据包过滤技术是适合应用代理也. 但是你不能提供一揽子的代理人. 有人会做你的,但代理人需要审查的内容包. 如果代理人许可,为客户提供内容,你的包将交付. 与应用层代理,你需要依赖别人来提供一揽子你. 但不同的是,如果这些电路级委托书取得交付包你的目的地, 他们会怎么做. 他们会怎么做. 他们无须知道内容内你的软件包