The aforementioned fix actually did not solve my issue on 10.9.1 using Server 3.0.2. Any other suggestions? I also see that the VPN service cannot be shut down. After sliding to off, it gives no message and automatically slides to On again...
Mac mini (Mid 2011), OS X Mavericks (10.9.1)
In my case I managed to fix it by means of this article:
http://jonsview.com/how-to-setup-os-x-10-9-as-a-l2tp-vpn-server-without-apples-s erver-app
And then especially the part about using an old version of Racoon (from Mountain Lion for example) to replace the current apparent defunct one in Mavericks...
By the way, note to others: it might have something to do with the fact that I had some silly trial version of VPN Activator (or something), which also ruined by settings it seems so I also deleted the /Library/Preferences/SystemConfiguration/com.apple.RemoteAccessServers.plist file and let it be recreated automatically again by the system.
VPN server update actually did not solve my issue on 10.9.1 using Server 3.0.2
