On 25/06/2015 4:48 p.m., Hector Chan wrote: > Not sure if this will help you, but I saw 503s on my squid when the origin > server has an invalid SSL certificate -- expired cert, self-signed cert, > etc. > Nod. They show up whenever Squid cannot successfully connect to the server. Thats what "503 Service Unavailable" means - unable to connect to server. And there are a huge amount of reasons that may happen. Anything that breaks the server connection encryption during SSL-bump would do it. Amos _______________________________________________ squid-users mailing list squid-users@xxxxxxxxxxxxxxxxxxxxx http://lists.squid-cache.org/listinfo/squid-users