When you request a video on Youtube, its web servers send two new HTTP headers to the browser : alt-svc alternate-protocol suggesting to the browser to switch to the new protocol QUIC. Unfortunately 1) QUIC, working over UDP, is not cacheable by squid 3.4 2) even if cacheable, IT admins have to upgrade many tools to support and account videos over QUIC ( proxy, firewall, bandwidth shaping, etc... ) See : http://wiki.squid-cache.org/KnowledgeBase/Block%20QUIC%20protocol We want to disable QUIC, so the servers and browsers fallbacks to normal HTTP for videos. --- I asked in another thread 3) support for Alternate-Protocol HTTP header. Amos' answer : As for #3, the Alternate-Protocol header patch is just automating these squid.conf settings, which you can use explicitly in any Squid version: acl AP rep_header_regex Alternate-Protocol . reply_header_access deny AP With that syntax : squid3 -k reconfigure 2015/12/31 14:34:21| FATAL: Invalid ACL type 'rep_header_regex' FATAL: Bungled /etc/squid3/squid.conf line 43: acl AP rep_header_regex alternate-protocol . Squid Cache (Version 3.4.8): Terminated abnormally. CPU Usage: 0.016 seconds = 0.008 user + 0.008 sys Maximum Resident Size: 37936 KB Page faults with physical i/o: 0 Is it rep_header, not rep_header_regex ? Is it reply_header_access with 3 parameters ? >From http://www.squid-cache.org/Versions/v3/3.4/cfgman/reply_header_access.html Usage: reply_header_access header_name allow|deny [!]aclname ... Which is the correct syntax to suppress in the replies these headers ? alt-svc alternate-protocol best regards, Sala _______________________________________________ squid-users mailing list squid-users@xxxxxxxxxxxxxxxxxxxxx http://lists.squid-cache.org/listinfo/squid-users