Reset OS X Software Update server

Reset OS X Software Update server My Software Update is broken. I had tried to set it to update from my OS X server (server.local) (instead of pulling from Apple) to save bandwidth, but was never able to get it working. Now when I run Software Update, I get:
Asked by: Guest \| Views: 215

Total answers/comments: 2

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Guest [Entry]

Deleting /Library/Preferences/com.apple.SoftwareUpdate.plist should be all you need, but it's possible that the settings lives in ~/Library/Preferences/com.apple.SoftwareUpdate.plist as well or even via MCX (Managed Client for Mac OS X). You can check the MCX settings by running sudo mcxquery -user shortusername | grep Update

Guest [Entry]

"This hint - 10.6 Server: Set the appropriate Software Update Server - says there are now three different update catalogs between 10.4, 10.5 and 10.6; and it also gives a different shell script to delete the existing catalogURL back to default:

defaults delete /Library/Preferences/com.apple.SoftwareUpdate CatalogURL"