Well, I use Windows XP, (in case that's at all relevant) and I cannot find access to these ports, I'm assuming their in the control panel, but I cannot find them, under network connections there's something that says 1394 connection, in case that's any good, but it probably isn't. Sorry, I'm a bit unskilled in networking, and XP, if it changes anything, isn't helping.
Okay, I've just tried what I'm pretty sure you're talking about, and it isn't working, It could be that I'm, from the looks of it, behind two firewalls, but I made an exception for one and turned off the other, it's still not working, I'll betcha it's really obvious and I'm just too dense to find it, I hate it when that happens, but it's not all that rare. *sigh*