squid: squid (proxy caching server) squid: squid: Squid is a high-performance proxy caching server for web clients, squid: supporting FTP, gopher, and HTTP data objects. Unlike traditional squid: caching software, Squid handles all requests in a single, squid: non-blocking, I/O-driven process. squid: squid: Squid supports SSL, extensive access controls, and full request squid: logging. By using the lightweight Internet Cache Protocol, Squid squid: caches can be arranged in a hierarchy or mesh for additional squid: bandwidth savings.