Re: Whiteboard and application sharing do not work

From: Jonathan Kay [MVP] (msnewsreplies_at_jonathankay.com)
Date: 11/27/04 

Date: Fri, 26 Nov 2004 23:09:29 -0500

Greetings Dave,

The RTC (Real-Time Communications) component which powers the audio conversations of MSN
Messenger can actually establish a connection even without an UPnP (detected anyway) NAT, the
Webcam functionality can do the same (and use a relay server) and file transfer can send
files directly through the server.

However, Whiteboard and Application Sharing do require an UPnP-enabled NAT (even with the
proper port forwarded; 1503) as it needs to send the proper IP information to your contact
(and has nothing to fall back on).

You might try installing the UPnP components in Windows -- click Start, Control Panel, Add or
Remove Programs, Add/Remove Windows Components, and under Networking Services, make sure that
Internet Gateway Device Discovery and Control Client as well as UPnP is installed.
____________________________________________
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) 2004 Jonathan Kay.
You *must* contact me for redistribution rights.

"Dave Ogle" <david.ogle@virgin.net> wrote in message
news:41a7a02e$0$49003$ed2619ec@ptn-nntp-reader03.plus.net...
> Perhaps you can help
>
> I am using MSN Messenger V6.2
>
> (Windows Messenger is also installed)
>
>
>
> Whiteboard and application sharing do not work
>
> Sound, video and file transfer work OK
>
>
>
> Looking in Tools/Options/Connection I have the following message:
>
> You are connected to the Internet through a non-UPnP symmetric NAT (Administrator)
>
>
>
> I am connected with a D-Link DSL-504T ADSL router with the following setup
>
> UPnP enabled
>
> Firewall & NAT enabled
>
> DMZ not enabled
>
> Port forwarding
>
> TCP,UDP 1024-1064,1863,6901
>
> TCP 1503,1720,1731,522,389,1503,5190,6891-6900
>
>
>
> I am running Windows XP with SP2
>
>
>
> Regards
>
> Dave Ogle
>
>
>
>

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