This old laptop has Ubuntu 22.04 installed:

• is used as an OpenVPN Server to keep me safe when I travel and to allow me to connect to my Home Network
• is used as a secondary DNS server

Because I have a Dynamic IP Address from my ISP, I'm using a Cloudflare DDNS script, so my VPN DNS will always resolve to my real IP Address! Check out the script https://github.com/pauldualsim/cloudflare