When using either Squid 2.6STABLE (latest) or Squid3HEAD, will the following work? acl myjar_cache_ctl urlpatch_regex -i .(jar) header_access Cache-Control deny all header_replace Cache-Control public, s-maxage=14400, max-age=14400 This is for overriding the cache-control settings for an internal/private Java JRE app where the client downloads the jar files from the server and runs them. I want to do this because the client-side java JRE is sending a cache-control no-cache setting, and my server is following also doing this. I have already set my server to the public/max-age, but the client still sends a no-cache directive. Nick