I run Windows 7, so yes, I can do that.
Pinging ssssforum.pcriot.com gave me a "request timed out" at 1464 bytes and below, and a "Packet need to be fragmented but DF set" at 1465 bytes and above. If it's an MTU problem, it's an odd one.
Hmm.
Edit: Hopefully things should work - I tried going further, and after a whole no-mans land of "request timed out" it ended up being 1438 bytes.
Edit 2: JoB, you are brilliant. Thank you. Everything is working now. Thanks to Eich, Richard, Andy, and P__ for helping out, too, and trying to puzzle this out!