Mixing ACL lists and rules – example scenarios

We have seen various ways in which to construct ACL lists to identify different requests from clients, and replies in some cases. We have also learned about the basic usage of access list rules. In this section, we'll be defining configurations for the different scenarios that a Squid administrator may face in day-to-day life.

Handling caching of local content

When we deploy a proxy server, normally all requests to external and internal websites flows through the proxy server. If we have caching enabled on our proxy server, then it's going to cache everything that is cacheable, which will result in caching of content from internal websites also. When we cache content from internal websites, we are unnecessarily wasting disk space on the proxy server because the advantage of caching the local content is almost none, as we generally have lots of free bandwidth on LAN.