近来,Internet安全产品的发展使得代理服务器、防火墙和加密VPNs之间的界限不再是那么明显了。对于那些为了让Internet入口进入当地互联网而正努力寻找综合解决方案的网络管理者来说,这样的发展结果是让其感到不解的。选择在路由器上是否用防火墙、代理服务器或简单的包过滤在过去是很简单的事 Recently, the development of Internet security products has made the boundaries between proxy servers, firewalls and encrypted VPNs no longer obvious. The result of such developments is puzzling to network managers who are struggling to find a comprehensive solution for getting their Internet portal to the local Internet. Choosing whether to use a firewall, proxy server, or simple packet filtering on your router was a simple matter in the past