Had a friend call me with an issue on his Mac OS X 10.4 server.  It seems after enabling the VPN server it started to take up 50-80 percent of the CPU load.   Now I would have prefered to troubleshoot this issue but he just wanted to disable the service and use a different peice of software for the VPN server (I would reccomend VPN-X Server.)  Howerver, upon going into server preferences and clicking on “ofF” it would slide itself right back to “on.”  The VPN server not wanting to stop under 10.4 is actually a pretty common problem, a lot more common then it overworking the CPU.  To fix this we need to figure out the name of the plist that launchd uses.  Look under /System/Library/LaunchDaemon (or LaunchAgents) for the file  name, it will be called something along the lines of vpnd.plist  After determing its name run the following command in terminal:  sudo launchctl unload -w /full/path/to/plist

This will tell launchd to stop automatically relaunching the process after you turn it off or kill the pid.

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