RE: [squid-users] How to avoid proxying for some sites?

From: Sam Pointer <>
Date: Fri, 17 Oct 2003 11:12:13 +0100

Henrik wrote:
>This you have to tell to your browser. Once the request reaches Squid it
>is too late to tell that it should not be sent to Squid..

This has always worked for me:

//file proxy.pac
//Put this file on an internal webserver somewhere and set the URL
//as the location of your autoconfiguration script in your
function FindProxyForURL(url, host)

        //If the hostname is not fully-qualified (eg. the intranet server)
        //then let user access it directly rather than thru the proxy.

        if (isPlainHostName(host)) {
                return "DIRECT";

        //Otherwise direct the browser towards the proxy servers.
        //We return PROXY1 and then PROXY2. If one proxy fails then we
        //failover to the next one.

        return "PROXY; PROXY;";


There are other variations to be found here: that allow
you to specify non-proxied connections on IP address ranges, etc. Dig and
you should be able to cook up something that you can use.

Sam Pointer
UNIX, Security & Network Administration
HPD Software Limited
Tel: + 44 (0) 20 8780 6800
Fax: + 44 (0) 20 8780 6801

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Received on Fri Oct 17 2003 - 04:19:22 MDT

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