Norman...I am testing squid3.3.3 running on Ubuntu and using the request_header_add setting but it is not working for me. I am just testing HTTP only, no HTTPS. I tried both of these settings: acl allip src 0.0.0.0/0.0.0.0 request_header_add X-YouTube-Edu-Filter "abc123" allip and also, request_header_add X-YouTube-Edu-Filter "abc123" all I verified with wireshark that the outgoing requests does not contain the HTTP header: X-YouTube-Edu-Filter:abc123 Can you confirm that 'request_header_add' working for you under squid3.3.3? Thanks. -- View this message in context: http://squid-web-proxy-cache.1019090.n4.nabble.com/Empty-macros-in-request-header-add-for-SSL-connections-Squid-3-3-3-tp4659578p4659846.html Sent from the Squid - Users mailing list archive at Nabble.com.