[X2Go-User] x2go client timeout when x2goagent cannot resolve ip

I have an Ubuntu 14.04 x64 system with x2go PPA, where certain users are restricted from accessing the Internet, but only local network and loopack access is allowed. When i try to login from a x2go-client from another system, the client connects to the x2goserver but after while it timeouts. I suspect that the x2goagent which runs with user uid tries to resolve the incoming ip and stalls there waiting the reverse dns lookup to be completed. Is any way to disable ip address reverse dns lookup for x2goagent?

Best regards, Nikolaos Kefalas