[CentOS] FreeNx doesn't work?

I have installed freenx with this article

http://wiki.centos.org/HowTos/FreeNX 

but when I use freenx-client on windows to connect to server, 
I always get an "freenx Authentication failed."

client err log output as this:
NX> 203 NXSSH running with pid: 1584
NX> 285 Enabling check on switch command
NX> 285 Enabling skip of SSH config files
NX> 285 Setting the preferred NX options
NX> 200 Connected to address: 192.168.253.5 on port: 22
NX> 202 Authenticating user: nx
NX> 208 Using auth method: publickey
NX> 204 Authentication failed.

My sshd configed as use rsa key, and ssh soft like xshell can work well.

nxsetup output as this: Pleas care the following red commented two line. I just think this is the point.
But why , and what shoud I do to solver ?

[root at tigertall ~]# nxsetup --test
----> Testing your nxserver configuration ...
Warning: Could not find nxdesktop in /usr/bin. RDP sessions won't work.
Warning: Could not find nxviewer in /usr/bin. VNC sessions won't work.
Warning: Invalid value "APPLICATION_LIBRARY_PRELOAD=/usr/lib/libX11.so.6.2:/usr/lib/libXext.so.6.4:/usr/lib/libXcomp.so.2:/usr/lib/libXcompext.so:/usr/lib/libXrender.so.1.2". /usr/lib/libX11.so.6.2 could not be found. Users will not be able to run a single application in non-rootless mode.
Warning: Invalid value "DEFAULT_X_SESSION=/etc/X11/xdm/Xsession"
         Users might not be able to request a default X session.
Warning: Invalid value "COMMAND_START_CDE=cdwm"
         Users will not be able to request a CDE session.
Warning: Invalid value "COMMAND_SMBMOUNT=smbmount". You'll not be able to use SAMBA. 
Warning: Invalid value "COMMAND_SMBUMOUNT=smbumount". You'll not be able to use SAMBA.
Error: Could not find 1.5.0 or 2.[01].0 or 3.[01].0 version string in nxagent. NX 1.5.0 or 2.[01].0 or 3.[012].0 backend is needed for this version of FreeNX.
  Warnings occured during config check.
  To enable these features please correct the configuration file.
<---- done
----> Testing your nxserver connection ...
Permission denied (publickey,gssapi-with-mic).
Fatal error: Could not connect to NX Server.
Please check your ssh setup:
The following are _examples_ of what you might need to check.
- Make sure "nx" is one of the AllowUsers in sshd_config.
    (or that the line is outcommented/not there)
- Make sure "nx" is one of the AllowGroups in sshd_config.
    (or that the line is outcommented/not there)
- Make sure your sshd allows public key authentication.
- Make sure your sshd is really running on port 22.
- Make sure your sshd_config AuthorizedKeysFile in sshd_config is set to authorized_keys2.
    (this should be a filename not a pathname+filename)
  - Make sure you allow ssh on localhost, this could come from some
    restriction of:
      -the tcp wrapper. Then add in /etc/hosts.allow: ALL:localhost
      -the iptables. add to it:
         $ iptables -A INPUT  -i lo -j ACCEPT
         $ iptables -A OUTPUT -o lo -j ACCEPT
[root at tigertall ~]# 


Thanks you!

2010-08-15 



gaohu 
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