@rdan can you share your nginx with filter module, i tried but not working.
Something like this: Code: ### Sub Filter sub_filter_last_modified on; sub_filter_once off; sub_filter 'src="/proxy.php' 'src="https://xf2-cdn.net/proxy.php'; sub_filter 'src="/styles/' 'src="https://xf2-cdn.net/styles/'; sub_filter 'href="https://xf2.com/attachments/' 'href="https://xf2-cdn.net/attachments/'; sub_filter 'src="https://xf2.com/attachments/' 'src="https://xf2-cdn.net/attachments/';