I am running squid as a reverse proxy. SQUID crashes when I use the following cache_peer_access settings: cache_peer 10.0.0.11 parent 8080 7 originserver no-query front-end-https=auto name=www1 acl webmail dstdom_regex -i ^webmail\..* cache_peer_access www1 allow webmail So, when I access my site http://webmail.foo.com/ SQUID crashes with a message Assertion failed: cbdata.cc:402: "c->locks > 0" Aborted. Now, if I replace cache_peer_accss with cache_peer_domain instead, everything works fine. For example: cache_peer_domain www1 webmail.foo.com I'm using the current CVS version for SQUID 3 on Fedora Core 3. This is most likely just a bug.