Template:Networking rutos configuration example l2tp over ipsec android

From Teltonika Networks Wiki
Networking RUTX VPN between HQ topology v3.png

Configuration overview and prerequisites

Prerequisites:

  • One RUTX router of any type
  • A Public Static or Public Dynamic IP address
  • At least one Android device

The topology above depicts the L2TP/IPsec scheme. - The router with the Public IP address (RUTX11) acts as the L2TP/IPsec server and the Android device acts as client. L2TP connects the networks of RUTX11 and Android client, IPsec provides the encryption for the L2TP tunnel. Only LAN traffic is going to go through that tunnel, any other WAN traffic won't go through it. This way the VPN tunnel will not be under a huge load and will provide greater speeds.

When the scheme is realized, you will be able to reach your home internal network with all internal systems, cameras, or other IOT devices, from anywhere in the world.

Configuring home router (RUTX)

L2TP


Networking rutos configuration example l2tp over ipsec android 1 v1.png

Login to the router's WebUI and navigate to the Services → VPN → L2TP page and do the following:

  1. Enter a custom configuration name.
  2. Select Role: Server.
  3. Click the Add button.
  4. Click the Edit button next to the newly created L2TP instance.

Networking rutos configuration example l2tp over ipsec android 2 v1.png
  1. Enable the L2TP instance.
  2. Enter a User name and Password for authentication for the client.
  3. Optionaly, set a fixed IP for this client (if left empty, client will receive first free IP from the IP range).
  4. Don't forget to Save the changes.

IPsec


Networking rutos configuration example l2tp over ipsec android 3 v1.png

Go to the Services → VPN → IPsec page and do the following:

  1. Enter a custom name for the IPsec instance.
  2. Click the Add button.
  3. Click the Edit button next to the newly created instance.

Networking rutos configuration example l2tp over ipsec android 4 v1.png

In the IPsec Configuration page, do the following (and leave the rest as defaults, unless your specific configuration requires otherwise):

  1. Enable the instance.
  2. Enter your Pre-shared key.
  3. Select Type: Transport.
  4. Set DH group to MODP1024.
  5. Go to Phase 2 settings and also set DH group to MODP1024.
  6. Save changes.

Android phone

Networking rutos configuration example l2tp over ipsec android 5 v2.png

Type VPN settings in the Windows search bar:


Networking rutos configuration example l2tp over ipsec android 6 v2.png

Click the Add a VPN connection button:


Networking rutos configuration example l2tp over ipsec android 7 v2.png

Configure the following parameters:

  1. Select VPN provider: Windows (built-in).
  2. Enter a custom Connection name.
  3. Enter the router's WAN IP address into the Server name or address field.
  4. Select VPN type: L2TP/IPsec with pre-shared key.
  5. Enter the Pre-shared key exactly as it was specified on the router.
  6. Select Type of sign-in info: User name and password.
  7. Enter the User name and Password exactly as they were specified on the router.
  8. Click Save

Networking rutos configuration example l2tp over ipsec android 8 v2.png

Type Network Connections in the Windows search bar:


Networking rutos configuration example l2tp over ipsec android 9 v2.png

Press right mouse click on your newly created VPN instance and select Properties:

Results

Networking rutxxx configuration examples l2tp over ipsec windows 10 10 v2.png

Home worker should now be able to access HQ network resources. To verify the connection you can ping some internal HQ server and if you get a reply, you have successfully connected to HQ‘s internal network.