Wait a minute, I think you misunderstood what I was trying to do.
I set up VPN on my lion server to use it as an internet tunnel when I need a secure internet connection that bypasses local isp blocks. I travel a lot and I need unblocked google when I'm in China. 🙂
Initially when I set up VPN, I could connect to my server at home from the outside world, but it only gave me access to my local network. This is what most people use VPN for, but I needed it for internet tunneling.
Thus, I followed the steps in post 7 of this thread. The long tutorial that you posted. I created a virtual interface (ethernet adapter). This was used to create the 192.168.2.* subnet. The server is on the 192.168.1.* subnet.
Afterwards I used the gateway setup assistant in the server admin tools. I followed your instruction. The wan interface is the ethernet adapter. The lan interface is the LAN virtual interface that we created.
After the gatway setup assistant finished, I noticed that it had enabled internet sharing from my ethernet interface to users using... WIFI! And suddenly a new wifi hotspot appeared, passwordless. I can see it from any wifi-enabled device within radius. I can't actually connect any devices to the wifi the lion server is broadcasting, but I can see it. And I am worried that someone with more experience in hacking will actually be able to break into my lion server through the wifi.
I just don't understand why the lion server won't share the ethernet connection over the virtual LAN interface that we created... Why in the world is it turning on the wifi and sharing THAT?