QSquidClassRoom
QSquidClassRoom is a GUI for a specific squid3 configuration
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For advanced uses it should be said that QSquidClassRoom is a complex of squid3 configuration file and access control lists, GUI tool and a program to reconfigure squid3 using user id substitution. Using this complex you can manage up to 7 access control lists in easy way.
Note, that for use QSquidClassRoom v1.1 you need a libvcr library of mine, which you can get at https://sourceforge.net/projects/libvcr