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I have installed OpenSSH server on my Ubuntu Linux box (10.04). I can SSH to the box properly, no problem. I have to use port 443/TCP. No problem accessing a shell prompt with PuTTY or other SSH client. Hoewver, when I try to use NX to have a graphical session, it is not responding. I thought that NX is simply using the settings used by /etc/ssh/sshd_config. Are there other parameters for NX that I should change so that it listens on port 443 ?

I use NX from nomachine.com, and the version of all components is: 3.4.0-5

Thanks :-)

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UPDATE: I installed and tested the ssh server before doing anything with NX. So I know that my router is properly configured. –  jfmessier Dec 2 '10 at 15:01
    
You can also edit you question of you have some addenda –  Stefano Palazzo Dec 2 '10 at 21:43
    
The configuration is to be done on the server, not the client. The server responds fine when I connect from outside, but not from inside. –  jfmessier Dec 4 '10 at 12:54
    
And I checked the routing. –  jfmessier Dec 4 '10 at 12:55

3 Answers 3

up vote 3 down vote accepted

On the commercial NX, edit /usr/NX/etc/server.cfg, change SSHDPort, and restart NX.

(A little more... I like to link the NX etc directory.)

ln -s /usr/NX/etc /etc/nx
sudo vim /etc/nx/server.cfg

Change SSHDPort and save.

/etc/init.d/nxserver restart
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If you are using FreeNX, you will need to edit /etc/nxserver/node.conf. In the General FreeNX Directives, locate this lines:

# The port number where local 'sshd' is listening.
#SSHD_PORT=22

Uncomment the second one and put there the port where sshd is listening. Note that I haven't been able to test it, so please comment if it doesn't work.

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Actually, I use the Commercial NX. But I give a point for the fact that this can be useful for all FreeNX users out there..... –  jfmessier Jan 27 '11 at 11:08

Looks like there should be some sort of GUI configurator available in the programs menu.

It also looks like there's a wizard you can run on the command line with

nxclient --wizard

More info here.

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You might also find the Ubuntu Community Doc on NomachineNX useful, help.ubuntu.com/community/NomachineNX –  bhamby Dec 2 '10 at 19:22

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