Firstly initiate SSH connection to server.
Enter your hostname , port, user , password and all.
Then go to .. title bar -> right click -> Change Setting..
.. go to Category -> Connection -> SSH -> Tunnels.
Enter source port ..
then the destination .. Ip:port
then. click Add.
..
then Apply.. done!
Note: Installation of NX Server for Linux requires the download and installation of three packages: client, node and server. The client is needed because it ships libraries used by the node. The node is needed because it ships tools needed by the server. Furthermore, the SSH server daemon (SSHD) needs to be up and running on each of the NX Node machines since NX relies on the mechanism provided by the SSH subsystem for handling user authentication.