Hi,

I'm afraid that's incorrect.

Messenger decides what port it's going to use, opens and forwards -that- port (actually
there's two of them), and then sends the request to the contact.

When the voice/video/file transfer/et al is over/cancelled, it removes the port entry.
____________________________________________
Jonathan Kay
Microsoft MVP - Windows Messenger/MSN Messenger
Associate Expert
http://www.microsoft.com/windowsxp/expertzone/
Messenger Resources - http://messenger.jonathankay.com
All posts unless otherwise specified are (c) 2005 Jonathan Kay.
You *must* contact me for redistribution rights.

"CWatters" <colin.watters@pandoraBOX.be> wrote in message
news:ijo5f.26831$0q5.1125422@phobos.telenet-ops.be...
>
> "Jonathan Kay [MVP]" <msnewsreplies@jonathankay.com> wrote in message
> news:ubYGzjB1FHA.1264@tk2msftngp13.phx.gbl...
>> Greetings,
>>
>> Well Messenger actually uses ports 5004 through 65535 UDP for voice/video
> conversations, so
>> if you're simply doing port restriction, you will have to open them all
> for Messenger to
>> work.
>>
>> As well, if the routers supported UPnP, then it would automatically open,
> forward and close
>> the ports are necessary when they're used.
>
> My understanding is that it opens all these ports because it doesn't know
> which port will be used. Presumably once a connection has been made it knows
> which ports are in use... so does it close the other 65534 or leave them all
> open until the connection is broken or you sign out of Messenger?
>
>