概要
This article describes the various network ports that are required for Windows Live Messenger features to work.

L1 support procedures
The following table lists the network ports that are required for various features of Windows Live Messenger 8.1 on a Windows Vista-based computer.

Feature                                                                                   Port that is used
Sign in to the Messenger service                                  TCP 80, 443, 1863
Network Detection                                                                  TCP 7001 UDP 9, 7001
Audio                                                                                       TCP 80, 443, 1863
                                                                                                TCP/UDP 30000 - 65535
Audio (Legacy) *                                                                      UDP 5004 – 65535
Webcam and Video Conversations                                       TCP 80 TCP/UDP 5000 - 65535
File Transfer                                                                  TCP 443, 1863
                                                                                                TCP/UDP 1025 - 65535
File Transfer (Legacy) *                                                  TCP 6891 - 6900
Sharing Folders                                                                        TCP 1863
                                                                                                 TCP/UDP 1025 – 65535
Whiteboard and Application Sharing                                        TCP 1503
Remote Assistance                                                                   TCP 3389
                                                                                                 TCP/UDP 49152 – 65535
Windows Live Call                                                                     TCP 443, 5061
                                                                                                 UDP 5004 - 65525
Games                                                                                       TCP 80, 443, 1863
                                                                                                  TCP/UDP 1025 - 65535

* These ports are used when you are connected to a contact through a legacy client program, such as MSN Messenger 5.0 or any version of Windows Messenger.

The following table lists the network ports that are required for various features of Windows Live Messenger on a Microsoft Windows XP-based computer.

Feature                                                                                        Port that is used
Sign in to the Messenger service                                                 TCP 80, 443, 1863
Network Detection                                                                       TCP 7001 UDP 9, 7001
Audio                                                                                            TCP 80, 443, 1863
                                                                                                     TCP/UDP 30000 - 65535
Audio (Legacy) *                                                                           UDP 5004 – 65535
Webcam and Video Conversations                                               TCP 80
                                                                                                     TCP/UDP 5000 - 65535
File Transfer                                                                                  TCP 443, 1863
                                                                                                     TCP/UDP 1025 - 65535
File Transfer (Legacy) *                                                                 TCP 6891 - 6900
Sharing Folders                                                                             TCP 1863
                                                                                                      TCP/UDP 1025 – 65535
Whiteboard and Application Sharing                                              TCP 1503
Remote Assistance                                                                        TCP 3389
Windows Live Call                                                                         TCP 443, 5061
                                                                                                      UDP 5004 - 65525
Games                                                                                           TCP 80, 443, 1863
                                                                                                      TCP/UDP 1025 - 65535

* These ports are used when you are connected to a contact through a legacy client program, such as MSN Messenger 5.0 or any version of Windows Messenger.

For more information about network ports that are used by MSN Messenger, click the following article number to view the article in the Microsoft Knowledge Base:
908386 ( [url]http://support.microsoft.com/kb/908386/[/url]) About the Internet ports that Messenger for Windows uses