Ｉｎｔｅｒｎｅｔ防火墙是这样的系统（或一组系统），它能增强 机构内部网络的安全性。防火墙系统决定了那些内部服务可以被外界访问；外界的那些人可以访问内部的那些可以访问的服务，以及那些外部服务可以被内部人员访问。要使一个防火墙有效，所有来自和去往Ｉｎｔｅｒｎｅ An Internet firewall is such a system (or a group of systems) that enhances the security of your organization’s internal network. The firewall system determines which internal services can be accessed by the outside world; those outside the community can access those services that are accessible internally, and those external services can be accessed by internal staff. To make a firewall effective, all come and go to Interne