> for various reasons I am trying to install a private repository for Centos 5, > and I would like to use HTTPS only connections. The servers must access to this > repository through a proxy. Well, I found the solution, but I am a little puzzled... The proxy has to be defined using https:// instead of http:// Yum could suppose himself that proxy is HTTPS aware and could try to connect the proxy using the CONNECT command instead of trying this insane "GET https://..." Hope this will help someone else facing the same problem a day ! -- Julien Gilles.