Configure strongSwan VPN Client on Ubuntu 18.04/CentOS 8

How to Setup IPSec Client in Ubuntu 16.04 » Techrunnr May 07, 2018 How to Setup an L2TP/IPsec VPN Client on Linux Apr 29, 2020

Install strongSwan on Ubuntu 18.04. Fortunately, strongSwan is available on the default Ubuntu …

How to Install and Configure strongSwan VPN on Ubuntu 18.04 Jul 08, 2020

VPN - Ubuntu Wiki

How to set up L2TP/IPSec VPN on Ubuntu