Im using aMSN behind a firewall, or using IP-Masquerade. Sending files won work, can I fix it?
In this case, the firewall may be blocking incoming connections. File transfers work this way: When you want to send someone a file, you send an invitation with your IP address and a port number. Then the remote client must connect to your IP:port to start the transfer. The used port is usually 6891, 6892 and so on (first transfer is on port 6891,but if you start a new file transfer while the first one hasn’t finished yet, then it will use 6892, and so on). If you are using a firewall, you must make sure that it allows incoming connections to port 6891 (and next ones if you want to be able to make more than one transfer at the same time). If you are behind a router, enable port forwarding for ports 6891 to 6900 to your PC’s internal IP address. You can change the port value from the “Connection” tab of the Preferences window.
