Required Network Ports for Multiplayer Flight Simulator 2004 (823630)

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Microsoft Windows firewall

With Microsoft Windows XP Service Pack 2 (SP2), you do not have to manually create port exceptions in the firewall. You may now create exceptions for the program itself. To do this, follow these steps.

Note Never open a port for a program that you do not recognize.

1. Click Start, and then click Control Panel.
2. Click Security Center.
3. Click Windows Firewall.
4. Click the Exceptions tab.
5. Click Add Program.
6. Click Browse.
7. Locate the game's executable file, and then click Open. By default, this game is installed in the following folder:

   C:\Program Files\Microsoft Games\Flight Simulator 9\fs9.exe

8. Click OK two times.

For additional information about how to use the Windows firewall, click the following article number to view the article in the Microsoft Knowledge Base: If you are not using the Windows firewall, you may still have to know the ports that are used by the game when you configure your network.

To make sure that these ports are open or to open these ports, contact your network administrator or Internet service provider (ISP). If you are the administrator of the network, view the documentation that is provided with your networking software to determine how to open these ports.

Flight Simulator 2004 requires that the following DirectPlay ports be open to play a Local Area Network (LAN) or Direct Internet multiplayer game:

Port	Protocol	Inbound / Outbound
23456	UDP	Both
6073	UDP	Both

To customize the Host and Client ports for your network, follow these steps:

1. Start Flight Simulator 2004.
2. Click Multiplayer.
3. Click Open Multiplayer Session.
4. Under Client Settings set both Host and Client to Other, and then select the alternative ports that you want to use.
5. Click OK.