Create VPN Connection in server 2008

For this scenario you have two server and client computer is connected to external network.

server 1:Active Directory installed Domain controller
have an one Network interface card, which has IP address: 20.0.0.1

1)start-->administrative Tools-->Active Directory Users and computers--
2)select a user which want be authenticated for VPN connection.
select user-->Right click-->Properties-->Dial in-->Network Access Permission-->Allow access--> ok .

server 2:Routing and remote access installed domain controller(This server is act as a router)
have a two Network interface card,One has ip address 20.0.0.2 and second has 40.0.0.1.
second one is connected to outside network

1)start-->Administrative Tools-->Routing and Remote Access

2)select Domain Controller-->Right click-->Configure and enable Routing and remote access

3)It will open a new window.
4)select Remote Access(Dial up or VPN)-->Next-->Tick on VPN-->Next-->Select your outside Network interface card-->Next-->ip Address Assignment(from specific range)-->next-->add your DHCP range-->Next-->Managing Multiple Remoter Access server(tick on no,use Routing and Remote Access to authenticate connection requests)-->Next-->Finish

5)Select your Domain-->Ipv4--> DHCP Relay Agent-->Add your outside network interface-->ok

Client pc1:(Operating system: windows 7)
1)control panel-->>Network and Sharing center-->Setup a new connection or Network
2)select connect to workplace-->Next-->Use my Internet Connection(VPN)-->I'll set up an internet connection later-->Internet address:(write a domain name of server 2)-->username:(username of authenticated user)) >> password:(password of that user)-->Finish
3)Run command ncpa.cpl
4)select VPN connection interface-->Give username and password of user-->Connect