Microsoft KB Archive/309128

= MechWarrior 4: Error Message When You Attempt to Connect to Multiplayer Game =

Article ID: 309128

Article Last Modified on 6/16/2005

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APPLIES TO


 * Microsoft MechWarrior 4: Vengeance
 * Microsoft MechWarrior 4: Mercenaries

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This article was previously published under Q309128



SYMPTOMS
When you attempt to connect to a multiplayer game of Microsoft MechWarrior 4, you may receive an error message that states &quot;Unable to Connect&quot; or &quot;Server Connection Failed.&quot;



CAUSE
This behavior can occur when you connect to the MechWarrior 4 server through a proxy server or firewall.



RESOLUTION
Firewall users must open up ports to use ZoneMatch and DirectX 8 DirectPlay port ranges to successfully participate in games. Matchmaking needs the following TCP ports opened:

27999

28805

28806

28807

28808

For PINGs to work properly, UDP port 28800 must be open.

NOTE: To have statistics posted to stats.zone.com from behind a firewall, you must have TCP port 9999 open for outgoing connections.



MORE INFORMATION
In addition to the ports listed earlier in this article, the DirectX8 DirectPlay ports are outlined in the following article:

240429 DirectX: Ports Required to Play on a Network

Additional query words: msgame networking multi-player

Keywords: kbnetwork kbprb KB309128

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