Greetings to the list! I'm very new to Squid configuration, and have been trying to research how to do this, but have ended up running in circles, so I'm coming to the list with this - hopefully someone out there has done something similar before, and can point me into the right direction, or perhaps even share a configuration file they have used. I've been tasked by my employer (a fairly good size web provider) with finding a way to utilize Squid as a reverse caching proxy - but the setup will be somewhat unique. The idea is to have a set of servers running squid, sitting behind a Foundry load balancer and communicating with each other via IPC, acting as caches for multiple web servers. The "origin" web servers (those actually running Apache httpd) may, or may not, be located on the same network segment. The idea is, point the DNS for the site at the loadbalancer, which will send to one of the proxies - if the requested file is cached by any of the proxies, it will be delivered from there, without a request to the true server. If not, the proxies will use some form of lookup to determine the true source for that particular address, get the file from there, and deliver it to the requesting client. Now, for some caveats. The Apache servers *may* be doing name-based virtual hosting, so when a request is sent to them, they must know the domain name being requested. The proxies must not allow arbitrary requests to work thru them - they must only answer for the domains they are configured to answer for, anything else should be denied. Wildcard hosts must be supported (i.e. we need to be able to say that the "true" server for *.foo.com is 12.34.56.78). We also must not cripple DNS resolution for other programs running on the proxy servers, which would seem to preclude the use of a private DNS server to resolve the "true" addresses. Is squid a good tool for this type of usage, or should I look elsewhere? And if so, can anyone point me to a good sample config file to look at and learn from? Thanks in advance! Jeremy Utley
