Some features of X-Plane require that X-Plane be able to communicate across your network. These features include:

  • networked multiplayer flights,
  • multi-computer simulations,
  • integration with EFIS App for iPad, and
  • integration with X-Plane Remote.

In order for your computer to “see” the other computers in the situations above, you must first allow X-Plane to communicate through your firewall. If your computer is not running a firewall, of course, this is of no concern to you.

To allow a program through the firewall in Windows XP, follow Microsoft’s instructions in Knowledge Base Article 842242.

To do this in Windows Vista and Windows 7,

  1. Open Windows Firewall by clicking the Start button, clicking Control Panel, clicking Security, and then clicking Windows Firewall.
  2. In the left pane, click Allow a program through Windows Firewall. If you are prompted for confirmation, click Allow.
  3. (Windows 7 only:) Click Change settings, then click Allow if asked for confirmation.
  4. Select the check box next to X-Plane, and then click OK.

To allow X-Plane through the firewall in Mac OS,

  1. Open System Preferences from the Apple menu.
  2. Click Security (called Security & Privacy in OSX Lion).
  3. Click the Firewall tab.
  4. Unlock the pane by clicking the lock in the lower-left corner and enter the administrator username and password.
  5. Click Advanced… to customize the firewall configuration.
  6. Click the + (plus) button, then select your copy of This is found in the X-Plane 9 or X-Plane 10 installation directory, which is located by default on your desktop. With X-Plane selected, click Add.

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