反端口禁止（Anti port inhibit）.docVIP

反端口禁止（Anti port inhibit） First, simply limit some websites Cannot access, online games (such as Lianzhong) can not play, such restrictions are generally limited to access the IP address. Its easy to break this kind of restrictions, with regular HTTP agents, or SOCKS agents. Its still easy to find HTTP agents online, and grab a lot of them. You can easily access the destination web site by adding HTTP agents to IE. Two, limiting certain agreements If not FTP, and so on, and there are restrictions on some network game server IP address, and these games do not support ordinary HTTP agent. In this case, you can use the SOCKS agent and Sockscap32 software to add the software to the SOCKSCAP32 and access it through the SOCKS proxy. General procedures can break the limit. For some games, consider Permeo Security Driver this software. If even SOCKS is limited, then you can use socks2http, not even HTTP is limited. Three, based on packet filtering restrictions Or banned some keywords. This kind of restriction is stronger, usually through proxy server or hardware firewall filter. For example: ISA Server 2004 prohibits MSN Do packet filtering. Such restrictions are difficult to break through, ordinary agents can not break the limit. This restriction can filter out keywords because of packet filtering, so use encrypted proxies, that is to say, HTTP or SOCKS proxy data streams are encrypted, such as springboard, SSSO, FLAT and so on, as long as the agent encrypted, you can break through, and with these software, and then cooperate with Sockscap32, MSN can go on. Such restrictions do not work. Four, port based restrictions Limit some ports, the most extreme case is limited, only 80 ports can access, you can only look at the web page, and even OUTLOOK receive, FTP are limited. Of course, for limiting several special ports, the breakthrough principle is the same. This limitation can be through the following 1 ways to break through, and find common HTTP80 port agent, 8:80, like this