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This Section
+ The 7004BR and 7008BR.

To configure your network for voice communications and file transfer using MSN. (this is extract from MSN site)
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This topic describes the settings that MSN Messenger Service uses for voice communications and file transfer. Perhaps they will be useful to you in configuring your firewall or proxy server.

For voice communications MSN Messenger Service establishes an outgoing TCP connection from port 6901 for all voice communications.

In the case of computer-to-computer communications, the call recipient also uses TCP port 6901.

In the case of computer-to-phone communications, the TCP destination (Net2Phone) port is between 7801 and 7825.

All voice traffic also uses UDP packets. The user's computer sends and receives UDP packets at port 6901.

The Net2Phone service sends and receives UDP packets using ports 6801, 6901, and 2001 to 2120.

For file transfer Both incoming and outgoing TCP connections use this range of ports: 6891 to 6900. This allows up to 10 simultaneous file transfers per sender. If you open only Port 6891, users will be able to do only one file transfer at a time.

The TCP ports need to be configured so that sockets on a port remain open for extended periods of time.

To allow your network users to have a direct connection to instant messaging services, you will need to:

Open outgoing TCP connections to Port 1863 on your proxy servers. Let your network users know which kind of proxy server your network uses HTTP, SOCKS4, or SOCKS5) and provide them with the corresponding details (server name, port number, and so forth) so they can enter that information on the Connection tab of the Options dialog box (Tools, Options). Make sure the internal local area network has access to the Domain Name System (DNS) servers to resolve the names of external hosts such as messenger.msn.com.

+ The ABR.

Special Application Page:
Enable the following trigger ports:
6901 TCP
6901 UDP
6891 TCP
1863 TCP
Enable the following public ports:
6901 TCP
6891 TCP
1863 TCP

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by Greywolf See Profile