- Navigate to the VPN page under Networking.
- Check the Enable L2TP over IPsec box. A Pre-Shared Key will generate in the second field. This can be changed if desired.
- In the Client IP Range box, enter an IP range that is not in use by your network. You can enter a subnet using CIDR notation (eg. 1.2.3.0/24), or an IP range (eg. 1.2.3.0-255)
- Confirm that your settings are correct and click Save and Apply.