On 05.08.2015 03:30 PM, Will Smith wrote: > 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.
X2Go makes extensive use of SSH tunnels. I suspect your firewall is too strict and denies access from localhost to localhost. Please make sure that locally, all connections are allowed. Mihai
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