VPN - Configure L2TP Client Configuration using Android, iOS, Windows & Linux Ubuntu

This article will show you how to create a L2TP tunnel to your Nebula and non-Nebula (stand-alone / on-premise) firewall / gateway (USG FLEX, ATP), via your mobile phone, or PC/computer. Testing your results.

Table of Content

1) Configure L2TP on Windows 10

2) Configure L2TP on MacOS

3) Configure L2TP on Linux Ubuntu

4) Configure L2TP on iPhone iOS

5) Test the Result

5.1 On Windows 10

5.2 On MAC OS

5.3 On Linux Ubuntu

5.4 On iPhone

5.5 On Android

1) Configure L2TP on Windows 10

Create a VPN profile.

"Settings > Network & Internet > VPN > Add a VPN connection"

Configure the required information and click Save.

2) Configure L2TP on MacOS

Create a VPN profile.
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"System Preferences > Network"
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Configure required information including firewall’s public IP and account name. Click Authentication Settings to set up passwords and a shared secret(Pre-shared key)
Click Advanced and check “Send all traffic over VPN connection”

If you're having problems with the routing of the VPN traffic, you can also set the IP, subnet mask and gateway to static under "TCP/IP:

3) Configure L2TP on Linux Ubuntu

Create a VPN connection.

"Settings > Network > VPN" and choose L2TP

Configure required information including firewall’s public IP, account name and password.
Configure the Pre-shared key.

Also, “3des-sha1-modp1024” for Phase 1 and “3des-sha1” for Phase 2