On Jan 10, 2011, at 11:21 PM, Vivek Gite wrote:
You can connect directly to your proxy server and proxy will connect
to Apache backend.

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Perhaps I'm asking the question in the wrong way.

I got nginx to send connections to the internal squid server, but it's treating it like a normal web server instead of an HTTP proxy. How can I get nginx to use the proxy as a proxy, instead of a web server?

So when I visit the nginx server, I just get:
ERROR

The requested URL could not be retrieved

While trying to retrieve the URL: /

The following error was encountered:

Invalid URL
Some aspect of the requested URL is incorrect. Possible problems:

Missing or incorrect access protocol (should be `http://'' or similar)
Missing hostname
Illegal double-escape in the URL-Path
Illegal character in hostname; underscores are not allowed
Your cache administrator is webmaster.

Generated Mon, 10 Jan 2011 21:31:07 GMT by internal_squid_server (squid/3.0.STABLE12)