I have my XP fw completely inactivated through through the admin tools folder in the control panel.
Before I used comodo I had hmm... well two different but the last one I know it was working with was Kaspersky internet security(antivir and fw in one) so I should be very surprised if it's a problem with my modem all of a sudden when it's not ever been a problem before. I've also used Zone Alarm free never had any problems ...
But anyway my speedtouch is a ...*checks* SpeedTouch510

So the brick wall should not be there?

OK I did what you said, started LW and yes I still saw the brick wall... but it could still be the FW that's the trouble then too, right?