For anyone using the Squid proxy server, either on Linux or Windows, these parameters will anonymize enough traffic so that websites you attempt to access will still work (such as ajax-heavy sites like Facebook), but your source IP information will still be concealed.
via off forwarded_for off header_access Cache-Control deny all header_access Forwarded-For deny all header_access From deny all header_access Keep-Alive deny all header_access Link deny all header_access Pragma deny all header_access Proxy-Connection deny all header_access Server deny all header_access Via deny all header_access WWW-Authenticate deny all header_access X-Cache deny all header_access X-Cache-Lookup deny all header_access X-Forwarded-For deny all