Apple OS X Server: How to configure a VPN service

The environment i have setup consists of an OSX Server, running file sharing and VPN. The file share is accessible from the local network on both windows or OSX machines, and OSX machines have no problem connecting to the server via VPN when on a remote network. Shimo | VPN Client for Mac – for Everyone Shimo is the swiss-army knife when it comes to VPN connections on the Mac. It supports all major VPN protocols and provides awesome automation features for those who regularly use VPN connections. OSX VPN :: Department of Computer Science | The University

OS X 10.5+ PPTP - Anonymous VPN Service Provider

Automatically connect to a VPN on startup in OSX (Example)

L2TP VPN configuration on Mac OS X | SonicWall

4. Connecting to the IT Services VPN service using the inbuilt VPN client. Once you have configured a network interface on your Mac to connect to the IT Services VPN service you can make a VPN connection whenever you need to. To connect via the inbuilt client: Open [System Preferences]; Click the Network icon to switch to the Network window; Select the VPN connection you configured previously