I don't understand what will be the actions of your Apache using this config : - Pragma/Cache-Handle has precisely the same role and you give them two differents configs. It is really Unusual. - no-keep indicate the ressource should not be cached. So how can it's revalidated ? I edited https://bookmarkswing.com/story22685057/not-known-facts-about-%E3%82%AA%E3%83%B3%E3%83%A9%E3%82%A4%E3%83%B3-%E3%82%AB%E3%82%B8%E3%83%8E-%E4%BB%AE%E6%83%B3%E9%80%9A%E8%B2%A8