Server 2008 R2 for a small environment or a stand-alone
1) Install the Role “Network Policy and Access Services” with the Server Manager
Select the Role Services “Routing and Remote Access Services”
Configure and Enable Routing and Remote Access in the Server Manager.
Choose “Custom Configuration” if you just have one Network Interface in the Server
Choose VPN access
Finish and click next
Allow access for users “Network Access Permission”. You can set that in de Dial-In Tab under the User Premission.
Open Ports in your Firewall
For PPTP: 1723 TCP 47 GRE
For L2TP over IPSEC: 1701 TCP 500 UDP
For SSTP: 443 TCP
Optional: If you don’t have a DHCP Server in your local network you
have to add a static address pool. This could be if you have a
stand-alone Server by your provider.
Right click on “Routing and Remote Access” and open Properties
Click on the IPv4 Tab and check “Static address pool”
Add a static address pool of private IP addresses
Add secondary IP Address to the Server network interface which is in the same subnet as this pool.