Networking :: MSN/Live messenger & iptables/NAT, UPnP neccesary?

Hi,

I just read a lot about clients with MSN Messenger behind a iptables-/NAT-router.
In short everything I read goes like this: MSN Messenger doesn't work completely behind a iptables/NAT-router because MSN uses mostly dynamic ports for everything accept the text-chatting itself. So I mean audio/video communication, filetransfers etc...

But, the sites and (mostly tweakers.net)topics I found where from béfore 2005.

So.... is this problem solved by now??

While writing this something just popped In my head... UPnP (Universal Plug 'n' Pray) should be a sollution to this problem, but is this possible in combination with iptables?

With regards,
Bart Grefte

anyone?

original here.