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MSN Messenger uses UPnP now

uPnP is about 'firewall discovery', gateway awareness at the O/S level, and automatic opening for traffic for applications.

MSN Messenger uses UPnP so if your router does not support it you can just forget about sending any files / audio / video with MSN Messenger.

Previous MSN connection problems are resolved by UPnP-aware applications and routers.

So just use a uPnP enabled router. (Make sure your router is uPnP enabled some routers that are uPNP compatable still require this to be enabled by the user)

Currently Microsoft offer uPnP on Windows XP only. It does not work with Windows 2000.


Port forwarding (The old way)

If your broadband router does not support uPnP, try to do port forwarding.

However, fixed port does not work well because it will limit you to only one client PC behind the router. UPnP is still the preferred method.

Enable NAT port forwarding on these incoming TCP ports 6901 & 6891-6900.

To enable voice communications, make sure that outgoing TCP connections from port 6901 are enabled. Also enable UDP packets where either the source or the destination port is 6901.

To enable file transfers, enable both incoming and outgoing TCP connections to the 6891-6900 range of TCP ports. This allows each sender to perform up to 10 simultaneous file transfers. Note that if only TCP port 6891 is open, users are only able to perform one file transfer at a time.

To enable messaging, enable outgoing TCP connections to TCP port 1863.




Last Updated: December 30, 2004

Last Update: 17 October 2002