OS X Server: Cannot administer AirPort base station after upgrading to Mountain Lion

After upgrading to OS X Server (Mountain Lion), when selecting an AirPort base station in Server.app, this alert may appear and you may be unable to administer the base station: "An error occurred on the server while processing a command. The error occurred while processing a command of type 'getIGDPortmaps' in plug-in 'servermgr_network'".


Update to OS X Server v2.1 or later.

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If similar messages persist after making portmap changes, you can use the following two Terminal commands as a workaround:

sudo /usr/libexec/PlistBuddy -c "delete :managedIGD" /Library/Server/Network/Config/autoportmap.plist
sudo /usr/libexec/PlistBuddy -c "delete :lastIGD" /Library/Server/Network/Config/autoportmap.plist
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