Moxy Proxy Licenseing System

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What moxy proxy can

While using GET/POST method (regular surfing the web):

• disable access to certain sites, like www.porno.com or www.icq.com;
• disable access to sites, containing banned keywords, like "porno" or even "proxy";
• cut off certain parts on pages (banners);
• disable receiving of files with predefined extensions (*.mp3, *.zip, *.exe, *.rar etc.) and/or predefined sizes (both in Kbs and/or in pixels, for example - 468x60);
• log web surfing activity and send report to system administrator with all web pages visited;
• disable use of any protocols (for example, disable access to "https://..." and/or "ftp://..." sites);
• disable access from any computers to this proxy. In other words it is quite possible that of two near by computers one may work with proxy and another may not;

While using CONNECT method (visiting "https://..." sites, building proxy chains, port mapping through proxy etc.) or using SOCKS proxy:

• completely disable CONNECT method (or turn off SOCKS proxy). Then ICQ will not work and there will be no access to "https://..." sites;
• disable connection through proxy to certain servers, for example, login.icq.com;
• disable connection through proxy to certain ports, for example, port 25 (SMTP), port 6667 (IRC), port 5190 (ICQ);
• disable connection through proxy to all ports except specified, for example, port 443. In this case proxy names "HTTPS proxy";

What moxy proxy cannot

• use heuristic analyzer, i.e. make semantic analysis of page contents and disable all sites with certain materials, despite the keywords;
• filter information, for example, block some pages using keywords while using CONNECT method (or in SOCKS proxy);
• let pass back connections from internet (SOCKS 5 can do it but this is also non-trivial task);

Resume: proxy server is a computer program, so as any program it has its own merits and demerits. If administrator tuned a proxy and forgot about it then proxy server always can be bypassed. Otherwise, your attempts to bypass proxy server are always a battle with sys admin and all your solutions are temporary - until administrator find and close just another "hole".