Make sure you have the Router installed with the correct firmware. In the upper right corner it should mention "vpn".
You can get the Firmware of your Router from the official site of DD-WRT. Be sure to check whether your router model has supported Firmware of VPN (In our case we have used OpenVPN generic firmware which supports both PPTP and OpenVPN).
Once you have installed VPN based firmware, open the web interface. Usually the default address to access the web interface is 192.168.1.1, but if you have a different IP configured, access through that IP.
The first page after installation will ask you to provide a new username and password for the web interface.
Set thecredentials you wish for this step
Install Correct Firmware
Go to the Services tab, and then click on VPN
Configuration of PPTP
Click on radio button Enable against PPTP client option and NAT.
Leave rest of the fields as with default settings
Enable PPTP Client
Now input server address or connection address, along with your username and password as shown in snap shot.
Click on SAVE , to save the settings
Now go to the Secuirty tab, and then click on Firewall.
Select disable against SPI Firewall
Go to Management under Administration tab again. Click on Reboot router.
This will allow you to connect to the VPN automatically on Reboot
Please allow few minutes (3-5 minutes) for the router to connect with the TUVPN server after Reboot.
Note: In normal cases you do not require to reboot a router, but in case if it doesn't connect you to the TUVPN server, Reboot will refresh the settings and let you connect with the VPN server.
Go to www.whatismyipaddress.com to confirm that you are connected with the TUVPN network.