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I'm using OpenNX on Mac laptop to access freenx server Ubuntu. I'm having authentication error, although I can ssh to the server without using only username and password.

FreeNX is running on the Ubuntu desktop.

nxserver --status
NXSERVER - Version 3.2.0-74-SVN OS (GPL, using backend: 3.5.0)
Usage: nxserver <option>
--passwd: Change password

Also while I'm checking the ssh log, it keeps saying that user nx is trying to access:

User nx from not allowed because not listed in AllowUsers
Oct  4 21:37:28 Cronus sshd[13526]: input_userauth_request: invalid user nx [preauth]
Oct  4 21:37:28 Cronus sshd[13526]: Connection closed by [preauth]

How to fix this problem?

share|improve this question
it looks like OpenNX is sending 'nx' as your username. are you filling in the 'Login' box with your username as shown here: ? – Frank Thomas Oct 5 '13 at 5:08
I did use my credentials as the same as ssh. – Dzung Nguyen Oct 5 '13 at 6:53

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