Hi Squid users, We're using squid3 as a reverse proxy on several boxes and he's working quite well. Squid configuration is quite simple : cache_peer X.X.X.X parent 80 0 no-query originserver no-digest cache_peer Y.Y.Y.Y parent 80 0 no-query originserver no-digest cache_peer_domain X.X.X.X static.myhost1.com cache_peer_domain Y.Y.Y.Y static.myhost2.com So squid deliver static content and ONLY get missing files from backend with cache_peer. But sometimes (several times a day), i got some stange errors from cache.log. It seems that squid is trying to contact servers that are not in cache_peer list with domain name that I should not handle any request !. Exemple : 2009/11/23 08:36:28| Failed to select source for 'http://img43.imageshack.us/img43/416/greysanatomypromotional.jpg' 2009/11/23 08:36:28| always_direct = 0 2009/11/23 08:36:28| never_direct = 0 2009/11/23 08:36:28| timedout = 0 [snip] 2009/11/23 11:02:26| Failed to select source for 'http://pagead2.googlesyndication.com/pagead/show_ads.js' 2009/11/23 11:02:26| always_direct = 0 2009/11/23 11:02:26| never_direct = 0 2009/11/23 11:02:26| timedout = 0 I'm not imageshack or google. :) Did someone have any idea ? Best regards. David.