Dear All,

 

I'm having a stange problem when attemping to connect to my Centos server using x2goclients (Ubuntu & mac, 4.0.5.0). I'm running firewalld, but port 22 is unblocked and I am able to ssh into the machine and forward X traffic.  When accessing from both a mac and an ubuntu client the session appears to start, but then immediately disconnects.  The client logs say:

 

Info: Proxy running in client mode with pid '12054'.
Session: Starting session at 'Wed Aug  5 12:38:47 2015'.
Info: Using abstract X11 socket in kernel namespace for accessing DISPLAY=:0.
Info: Connecting to remote host 'localhost:31003'.
Info: Connection to remote proxy 'localhost:31003' established.
Error: The remote NX proxy closed the connection.
Error: Failure negotiating the session in stage '7'.
Error: Wrong version or invalid session authentication cookie.
Session: Terminating session at 'Wed Aug  5 12:38:53 2015'.
Session: Session terminated at 'Wed Aug  5 12:38:53 2015'.

 

 

If I attempt to reconnect, I can see the session, but am unable to resume it.  The strange thing is that if I stop firewalld, I'm able to access the server from both clients with no issues, which implies it's a firewall issue, but as I say port 22 is unblocked and I can forward X traffic.  Is there some other obvious firewall setting I've failed do?  Any assistance in fixing or diagnosing this issue would be highly appreciated.

 

Many thanks,

 

 

Will.