I am trying to reduce the lag in multiplayer games. With support from DigitalOcean, I installed OpenVPN on my Lightsail server. I have a stable connection with my own server when the VPN is off. When the VPN is on, the connection is unstable. I changed the server.conf settings like the configuration of NordVPN, but nothing changed. OpenVPN working on Ubuntu 16.04.
https://www.digitalocean.com/community/tutorials/how-to-set-up-an-openvpn-server-on-ubuntu-16-04
tun-mtu 1500
tun-mtu-extra 32
mssfix 1450
ping-timer-rem
reneg-sec 0
comp-lzo no
fast-io