Re: Forwarding loops with squid 2.0 RELEASE

From: Niall Doherty <>
Date: Tue, 20 Oct 1998 14:37:50 +0100

> > Try Squid-2.0.PATCH2. It has fixes for digest forwarding loop bugs.
> I have now upgraded three of our external caches to Squid-2.0.PATCH2.
> There are all set up as mutual peers.
> The incidence of the loop warnings has certainly diminished, but it has
> not disappeared:

The fix Duane is referring to breaks any forwarding loops that are
detected. It doesn't stop them occurring.

One way of stopping them is to configure your cache so that any
requests that originate from siblings, do not cause requests to
go out to any other siblings (and the other sibling maintainers
should do the same). Here's an example:

  # siblings you know about
  acl from_peers srcdomain "/usr/local/squid/etc/trusted_caches"

  # caches you use as *siblings* only - parents not necessary
  cache_peer_access deny from_peers
  cache_peer_access deny from_peers


Niall Doherty          |
Systems Engineer       |
Voice: +353 1 207 7506 | Ericsson Systems Expertise Ltd.,
Fax:   +353 1 207 7115 | Beech Hill, Clonskeagh, Dublin 4, Ireland.
Received on Tue Oct 20 1998 - 07:42:43 MDT

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