So I set my HTTP proxy via Settings -> Preferences -> Network setup, and am getting this error:
Looking up irc.us.gimp.org
Looking up <IP>
Connecting to <IP> (<IP>) port <PORT>...
HTTP/1.1 502 Proxy Error ( The specified Secure Sockets Layer (SSL) port is not allowed. ISA Server is not configured to allow
Proxy traversal failed.
Stopped previous connection attempt (pid=4696)
(<IP> and <PORT> are substitutions)
Without that setting (the IP:PORT is left empty), I'm getting this error:
Looking up irc.us.gimp.org
Connecting to irc.us.gimp.org (192.219.30.200) port 6667...
Connection failed. Error: Connection refused