[FreeNX-kNX] 716 Slave mode failed to start script error?

[Chris]

freenx-knx-bounces at kde.org wrote on 02/05/2013 08:27:03:
[SNIP]

> >You can best test your ssh from the FreeNX server 
> > using the line of NX code ( with "your-user-name-here added" ) 
>> 
> >
>> ssh  -2 -x -l "your-user-name-here" 127.0.0.1 -o 
"NumberOfPasswordPrompts 1" -p 22 

> 
> This proved to be helpful.  I could SSH into the server, but I 
> couldn't SSH locally on the server.  I checked my logs and found this:
[SNIP]
> opened for user nx by (uid=0)
> May  2 01:01:54 chi nxserver[10860]: (nx) Failed login for 
> user=[username] from IP=[myip]
> May  2 01:01:54 chi sshd[10619]: pam_unix(sshd:session): session 
> closed for user nx
> 
> SSH would instantly close when I tried it locally with the following 
errors:
> 
> Connection closed by ::1
> Connection closed by 127.0.0.1
> 
> So, to fix it, I commented all the IPv6 lines from the hosts file, 
> and removed some huge long lines that spanned forever that were 
> added for all of the websites I host so that I can access them 
> locally by using the hosts file.  This is done automatically by the 
> software I use.  I guess the length was so long, it corrupted 
> things.  I have since turned this feature off.
> 
> Thanks for the help!

This is caused by  localhost  becoming  ::1   i.e. IPv6

If you aren't   IPv6-ing to ssh you can try
 
        AddressFamily inet
 
in sshd_config
to
pin sshd to IPv4
else
disable IPv6 in 

        /etc/sysctl.conf

net.ipv6.conf.all.disable_ipv6 = 1
net.ipv6.conf.default.disable_ipv6 = 1




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