I have a G4 running OS 10.4.6 on a Proxy server network at my Job and I am having problem connecting to Yahoo's Instant messenger.
I enable all of the following Proxy setting in System Prefs:
FTP Proxy
Web Proxy (HTTP)
Secure Web Proxy (HTTPS)
Streaming Proxy (RTSP)
SOCKS Proxy
I have assigned each with a Proxy server and Port setting.
In Yahoo Instant Messenger Preferences, I have enable the
"Use Proxies" check box and added the HTTP Proxy Server
and Port setting.
But I am unable to connect to Yahoo Instant Messenger at all.
Then I tried using a app called SquidMan which is a MacOS X graphical installer and manager for the Squid proxy cache. It is designed to operate as a "personal" proxy server.
http://homepage.mac.com/adg/SquidMan/index.html
I was able to connect with SquidMan but Yahoo Instant Messenger Crash after a few minutes.
William