請問我裝Norton防火牆之後，卻無法使用MSN？
是不是要設定什麼才可以用呢，因為我把他關掉就可以了。

我裝都沒有這個問題說

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.

IN TCP 6891 - 6900
IN TCP 1863
IN UDP 1863
IN UDP 5190
IN UDP 6901
IN TCP 6901

或者是把即時通訊保護項目給解除就不會再出現了(若你是用MSN Messenger 5.0的話)