Squid is a high performance Web proxy cache that can be arranged hierarchically for an improvement in response times and a reduction in bandwith usage. Squid runs on all popular Unix and Windows platforms.
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Squid now drops any requests using transfer-encoding. A security issue in how Squid forwards proxy authentication credentials has been fixed, there are some minor changes to support Mac OS X and some other platforms more easily, and the client -T option has been implemented. There were some HTCP-related bugfixes in "squid -k reconfigure", several security fixes to the Gopher code, MSNT auth helper, and FTP to HTTP parser, and FTP datachannels are now sanity checked.