OpenVPN

https://developers.redhat.com/blog/2018/10/22/introduction-to-linux-interfaces-for-virtual-networking/

This is a good resource: https://forums.openvpn.net/viewtopic.php?t=28008

https://ubuntu.com/server/docs/service-openvpn

Documentation

ManPages

https://community.openvpn.net/openvpn/wiki/Openvpn24ManPage

https://openvpn.net/openvpn-community-edition-vs-access-server/

https://community.openvpn.net/openvpn/wiki/GettingStartedwithOVPN

https://community.openvpn.net/openvpn/wiki/BridgingAndRouting

sudo systemctl restart openvpn@server.service
sudo systemctl restart openvpn@client.service

sudo systemctl start openvpn@client.service
sudo systemctl enable openvpn@client.service

Important Notes

• Remote server addresses must match domain names on PKI server certificates