I'm pretty sure there's authentication going on with the proxy - but I reckon it does it automatically with windows using the logon parameters.
The SunPCI card has its own network socket, so it is connected independantly. I'll try that snoop command when using netscape though - see if it can shed any light on the matter.

Maybe it distinguishes between Windows and other OS clients somehow.
This is what I was afraid of - do proxys do this? I suppose it's totally up to the proxy.

Thanks.