By default, an access to the virtual domain name "http://mypro.xyz" is interpreted as an access to your proxy server. HTTPCONF="mypro.xyz:forw" enables forwarding the request to upstream proxies by prefixing the hop count. HTTPCONF="mypro.xyz:thru" disables this interpretation and forward the request to the upstream proxy if exists. HTTPCONF="mypro.xyz:stop" stops this interpretation and forwarding at all. Another way for restriction of access to mypro.xyz is using AUTHORIZER as AUTHORIZER="-list{User:Pass}:*:*.mypro.xyz:*".