L2TP VPN is not working on Ubuntu 20.04. Same credential is working fine with Ubuntu 18.04

Question

L2TP VPN is not working on newly installed Ubunut 20.04 and 20.10. Credentials are correct and same is working with Ubuntu 18.04

Answer 1

The package network-manager-l2tp is required.

You may have to install it:

sudo apt install network-manager-l2tp

I hope it helps

Answer 2

I was facing this myself in Ubuntu 20.04 and 21.04, and a simple one-liner solved all requirements necessary for my L2TP/IPsec setup to work properly:

sudo apt install --install-suggests network-manager-l2tp-gnome

This installs all packages mentioned in the previous answers, too. Endpoint to connect to is a Ubiquiti EdgeRouter ERLite-3.

Answer 3

Check your log i suspect you may need to install these as well if the dependancy is not met:

 sudo apt install libstrongswan-standard-plugins libstrongswan-extra-plugins