Here are the steps you should follow:
This tutorial will show you how to set up L2TP VPN on DD-WRT Routers using the SirVPN services. If you don’t have a SirVPN account, you can try our services.
To setup L2TP VPN on DD-WRT router you will have to flash your router with DD-WRT firmware and set router local IP address as 192.168.1.1. Also, verify if you are able to connect to Internet via Wi-Fi from your DD-WRT router. Also, we recommend to check if your network configuration and ISP allow L2TP/IPsec connections on on your PC or Mac.
Connect to your router. To do that you have to enter the following address in your browser: http://192.168.1.1. Also, if you are connected to your router via Ethernet, set your network connection to obtain the IP address automatically.
Then fill the fields and check the radio buttons with the following settings:
“Connection Type” – choose “L2TP” (2).
“Gateway (L2TP server)” (3) – type the IP address of the SirVPN server you want to connect to.
In the “Username” (4) and “Password” (5) fields type your VPN username and password.
“Use DHCP” – choose“Yes” (6).
“Optional Settings” compartment:
“MTU” – change it to “Manual” (7) and type the value 1460 (8) in the next field. “STP” (9) – set it to “Disable”.
“Network setup” zone:
“Local IP Address” – enter the IP address for the DD-WRT access point (10). Note: if this is the second router then you have to set a different Local IP address then your main router.
“Network Address Server Settings (DHCP) zone:
“DHCP Type” (11) – choose “DHCP Server”.
“DHCP Server” (12) – choose “Enable”.
Verify all the settings and make sure that everything looks exactly like in our screenshot.
Click on “Apply settings” button (13).