Whiteboard

[Rich Hall]

I receive an invitation to use whiteboard and accept, but nothing happens.

Is this a port issue?

 

[Jabez Gan]

Rich,

Whiteboard uses port 1503 TCP, which needs to be enabled to traverse any
firewalls. Since a specific port is used for the TCP data connection
(1503), if the client is behind a non-UPnP NAT device, the port must be
mapped to that client. This ensures communication through the least common
denominator NAT device. This also means the port cannot usually be used by
another client behind the NAT device; only a single client behind the same
NAT device can have an AS or WB session active.

Source/More Info:
http://www.microsoft.com/technet/prodtechnol/winxppro/deploy/worki01.mspx

 

[Jonathan Kay [MVP]]

Hi,

If using a NAT without UPnP, the Whiteboard just will not work; regardless if you forward the
port or not.
____________________________________________
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.

Rich,

Whiteboard uses port 1503 TCP, which needs to be enabled to traverse any firewalls. Since
a specific port is used for the TCP data connection (1503), if the client is behind a
non-UPnP NAT device, the port must be mapped to that client. This ensures communication
through the least common denominator NAT device. This also means the port cannot usually be
used by another client behind the NAT device; only a single client behind the same NAT
device can have an AS or WB session active.

Source/More Info: http://www.microsoft.com/technet/prodtechnol/winxppro/deploy/worki01.mspx