Hello Amos, I will try to compile Squid 2.7 Stable9 since it doesnt exist on Windows . Does Squid 2.7Stable9 Support Etag Caching ? My Target is to apply Youtube.patch and so many options I have seen on internet but I always wanted to ask you before I do anything . Is it possible to apply patches like ignore-no-store , store-stale , ignore-must-revalidate . If that would be possible for me then I am going to be happy at least I can have all configurations in one Squid Instance . I already thought of installing Squid Version Lusca Head on Windows but it is so buggy though I really liked the Lusca head . What are your suggestion to have all these options in one Squid Version ? Ghassan.