I know you say you don’t want to tunnel, but if you want to use SSH with NoMachine (free version) you need to tunnel the NX protocol through an SSH connection.
Connecting by SSH to a free NoMachine 4 server
https://www.nomachine.com/AR10K00728
I know you say you don’t want to tunnel, but if you want to use SSH with NoMachine (free version) you need to tunnel the NX protocol through an SSH connection.
Connecting by SSH to a free NoMachine 4 server
https://www.nomachine.com/AR10K00728