I've been using IPcop for many years successfully, and have recently run into one site that fails to work correctly for 2 applications whenever squid transparent proxying is turned on. (Everything else has been working nicely.)
I am running IPcop 1.4.12, the latest release, with no additions other than midentd (locally installed).
The two Linux applciations that have problems are CallGit and FLdigi. These apps make http requests to a site:
www.qrz.com . Both apps appear to be making http requests, yet never get the site response whenever transparent proxying is active (they get a socket timeout, and appear to get the request to the site but never see the site response). Both work fine when proxying is disabled. The web site works fine in a browser when transparent proxying is active. I have contacted both application authors and they state that they are making simple http requests to the site and parsing retuned http data.
What I'd like to do is to setup a redirect for this one web site prior to the redirect for squid transparent proxying. I don't know where exactly to add the rule, or know what the appropriate syntax for the entry would be. It looks like
rc.firewall.local is the place recommended to add the custom rule, but I don't know what the correct start and stop rules for bypassing squid for a single site would be.
I'd greatly appreciate any advice and ideas as to how to solve my squid proxy issue.
Rick