Squid proxy authentication in transparent mode

Posted on in Categories , , , , , last updated November 1, 2007

Q. I was referring to your Squid transparent proxy configuration howto, and my question to you – can proxy authentication be done in transparent mode?

A. Short answer: noop, you cannot use Squid proxy authentication in transparent mode.

From official squid docs:

Authentication cannot be used in a transparently intercepting proxy as the client then thinks it is talking to an origin server and not the proxy. This is a limitation of bending the TCP/IP protocol to transparently intercepting port 80, not a limitation in Squid.

Posted by: Vivek Gite

The author is the creator of nixCraft and a seasoned sysadmin and a trainer for the Linux operating system/Unix shell scripting. He has worked with global clients and in various industries, including IT, education, defense and space research, and the nonprofit sector. Follow him on Twitter, Facebook, Google+.

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