Connecting to the office network remotely from your home via VPN (L2TP over IPsec) using RUTX

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Networking RUTX VPN between HQ topology v4.png

Configuration overview and prerequisites

Prerequisites:

  • One RUTX router of any type
  • A Public Static or Public Dynamic IP addresses
  • At least one end device with Windows 10


The topology above depicts the L2TP/IPsec scheme. - The router with the Public IP address (RUTX11) acts as the L2TP/IPsec server and the Windows 10 device acts as client. L2TP connects the networks of RUTX11 and Windows 10 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, home workers will be able to reach corporation’s internal network with all internal systems, allowing working from home to be possible.

Configuring HQ corporation router

L2TP


Networking rutx configuration examples l2tp over ipsec windows 10 1 v1.png

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

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

Networking rutx configuration examples l2tp over ipsec windows 10 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 rutx configuration examples l2tp over ipsec windows 10 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 rutx configuration examples l2tp over ipsec windows 10 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. Save changes.

Home worker’s computer

Networking rutxxx configuration examples l2tp over ipsec windows 10 6 v2.png

Type VPN settings in the Windows search bar:


Networking rutxxx configuration examples l2tp over ipsec windows 10 7 v2.png

Click the Add a VPN connection button:


Networking rutxxx configuration examples l2tp over ipsec windows 10 8 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 rutxxx configuration examples l2tp over ipsec windows 10 11 v2.png

Type Network Connections in the Windows search bar:


Networking rutxxx configuration examples l2tp over ipsec windows 10 12 v2.png

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


Networking rutxxx configuration examples l2tp over ipsec windows 10 13 v2.png

Navigate to Networking section and double click Internet Protocol Version 4 (TCP/IPv4):


Networking rutxxx configuration examples l2tp over ipsec windows 10 14 v2.png

Go to Advanced settings:


Networking rutxxx configuration examples l2tp over ipsec windows 10 15 v2.png

Now disable Use default gateway on remote network and save settings:


Networking rutxxx configuration examples l2tp over ipsec windows 10 9 v2.png

Go back to the VPN settings page, locate your new connection and click the Connect button. If the connection was successful, you should see the word "Connected" appear under the connection name:

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.