Re: [squid-users] squid, forwarding some specific requests to another proxy

From: Duane Wessels <>
Date: Wed, 11 Feb 2004 22:56:00 -0700 (MST)

> The output is generated by my ISP. Costumers have learned that
> they can pick some proxy (on port !80) and get to the websites that
> are being filtered by my ISP. I wonder if I can do it automatically
> for them. I do not want to use a fixed proxy server, say it being
> the parent of my cache server. what I want is to use a proxy server
> to somehow bypass my isp filtering for the sites it is doing the
> filtering. Squid log produced TCP_MISS 403 for these pages. I
> want customers access the websites which are not being filter, via
> my cache server. Can squid be used, say using acl or so, to work
> out my plan?

Its not clear to me which parts of this you control, and which parts
you do not. I will assume that all requests go you your Squid cache
and that your upstream ISP is using HTTP interception.

You can define a parent cache and forward only certain requests to it.
for example, you can sign up to use one of the IRCache proxies
( and use a Squid configuration such as this:

  acl BlockedByISP dstdomain
  acl BlockedByISP dstdomain
  cache_peer parent 3128 3130
  cache_peer_access allow BlockedByISP
  never_direct allow BlockedByISP

Duane W.
Received on Wed Feb 11 2004 - 22:56:00 MST

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