How to block the HTTP tunneling software through proxy server?

Solution Verified - Updated -

Issue

  • We have a Proxy Server on RHEL 5.3 and I want to block HTTP tunneling software (c.f. "Ultrasurf") through our proxy server. This software is used to bypass the proxy server to surf any website.

Environment

  • Red Hat Enterprise Linux 5.3
  • Squid

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