VPN DNS issues
Seemed to have a conflict w/ IPv6 VPN vs the IPv4 one, first had priority. Then I had an issue where the VPN IP was the same as the IP of my router. Fixed by moving router IP. Learned a lot about how DNS works.
Lookup website using particular DNS
nslookup somewebsite.com 18.104.22.168looks up the website using the provided 22.214.171.124 DNS server.
systemd-resolve --statusgives the current DNS settings.
sudo systemd-resolve --flush-cachesflushes the DNS caches.