Problem on Whonix when connecting to NordVPN, or basically any other linux vpn provider!

What you’re asking for are very complex issues. Most of Whonix users probably “just” connect to the public Tor network and that’s it. Due to time restraints, I cannot produce (create from scratch) full solutions. In this case I only replied to something obvious that is easy for me to answer. That may or may not help you or any other advanced users to provide further advice or to fix the issue.

apt is configured to use Tor SocksPort.
users who can access clearnet by default on Whonix-Gateway are users:

  • debian-tor
  • clearnet

But networking only. There is no system default DNS on Whonix-Gateway since not needed.

More information on that subject:

Also worth reading: