https://openvpn.net/

https://community.openvpn.net/openvpn
https://openvpn.net/index.php/access-server/docs/admin-guides/182-how-to-connect-to-access-server-with-linux-clients.html

https://wiki.archlinux.org/index.php/OpenVPN
https://wiki.archlinux.org/index.php/OpenVPN#The_client_configuration_file

https://github.com/OpenVPN
https://github.com/OpenVPN/openvpn
https://github.com/OpenVPN/openvpn3
https://github.com/OpenVPN/openvpn3-linux
https://github.com/OpenVPN/openvpn-gui
https://github.com/OpenVPN/openvpn-build
https://github.com/OpenVPN/easy-rsa

DNS
https://wiki.archlinux.org/index.php/OpenVPN#Update_resolv-conf_script
https://github.com/masterkorp/openvpn-update-resolv-conf

https://wiki.archlinux.org/index.php/OpenVPN#Update_systemd-resolved_script

misc
max-routes 1000 # --max-routes 500