Detect proxy software - Internet access control

[Milind Nanal <milindyn () rolta com>]

Dear,

I am looking for any freeware/ commercial evaluation tool which would detect
the  systems running with proxy application to serve other system. I want to
have strict control on Internet access. So I want only allowed users should
use the Internet facility & they should not be running proxy application to
server Internet for their friends.

Regards,

Milind 



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