Hi, I am first time squid user and was wondering if could get some help. I tried to find answers to these questions on-line, but unsuccessfully... I have 2 squid boxes setup as reverse proxies in a cluster (they're using each other as siblings). On the backend I'm using single tomcat server that both squid boxes use to retrieve content. Squid version I'm using is 3.0. I'm running into couple issues: Issue #1: Whenever squid box receives request for url that contains querystring (e.g. - http://site1:8080/RSSSource/rss/feed?max=1) it does not contact sibling cache for that resource, but it retrieves it from the backend server right away. What's odd is that it works (sometimes...) when query string is not present (e.g. http://site1:8080/RSSSource/rss/feed). Issue #2: Let's say squidA receives request for some resource (e.g. http://site1:8080/RSSSource/rss/feed). If squidA doesn't have it in its cache, it will check if it's available from squidB. However, if squidA has expired version of that resource, it doesn't contact squidB but retrieves it directly from the backend server, which should not be the case (it should check if squidB had valid copy available), correct? Here are relevant squid.conf lines for one of the squids (everything else is unchanged, config for the second squid is the same except for sibling references): ######################################################################## ########## http_port 80 accel vhost icp_port 3130 acl sites_server1 dstdomain site1 acl siblings src address.of.squidA.com cache_peer address.of.backend.server.com parent 8080 0 no-query no-digest originserver name=server1 cache_peer address.of.squidA.com sibling 80 3130 name=sibling1 no-digest allow-miss weight=5 cache_peer_access server1 allow sites_server1 cache_peer_access server1 allow siblings cache_peer_access sibling1 allow sites_server1 http_access allow sites_server1 http_access allow siblings http_access deny all icp_access allow siblings icp_access deny all miss_access deny siblings ######################################################################## ########### I tried using HTCP instead of ICP, but I got same results... Does anyone know solution to these 2 problems? One thing I didn't mention is that tomcat backend server is including conditional get headers in responses, however I don't think it matters... Let me know if more info needed. Thanks in advance!