Auf die Schnelle hab ich 1863 tcp/udp gefunden. Wenns damit nicht klappt, könntest du diese ausprobieren:
Zitat:
MSN Messenger
(Watch Out! Opens a wide port range!)
NOTE: Shut off any personal firewall programs such as BlackIce, ZoneAlarm, etc.
Ports 6891-6900 enable File send, Port 6901 is for voice communications.
Allows Voice, PC to Phone, Messages, and Full File transfer capabilities.
Thanks to Brad King & Bill Finch Jr.
IN TCP 6891 - 6900
IN TCP 1863
IN UDP 1863
IN UDP 5190
IN UDP 6901
IN TCP 6901
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quelle:
http://www.practicallynetworked.com/..._port_list.htm