Xmanager Forum

XDMCP - Lan work, VPN not working

Last post: Sunday, April 7, 2013 5:40 PM by Support, 1 reply

Wednesday, April 3, 2013 4:52 AM - Cedric

XDMCP - Lan work, VPN not working

Hi Support,

When I try to access my access server using XDMCP in a LAN enviroment I had no issue. But When I try connect it using VPN, I double click on the session it just give me a blank grey screen instead of the login screen.

Attached is the IP config and Logs for your action.


Program Ver. : Xmanager 4
Connect Method : XDMCP connection
Sunday, April 7, 2013 5:40 PM - Support

Re: XDMCP - Lan work, VPN not working

XDMCP via VPN and LAN should be the same. There are few things you need to consider:

1. Is UDP port 177 toward UNIX server allowed on UNIX and VPN server?
2. Is TCP port 6000 - 6010 allowed on Windows?
3. Is VPN configured correctly to route XDMCP data packets to the remote host?

Also, the log file shows that you have reached maximum concurrent connection limit:

"XDMCP fatal error: Session declined Maximum number of open sessions from your host reached
User forces server termination."

To increase the max concurrent user session, change the DisplaysPerHost value in the /etc/X11/gdm/gdm.conf file.

Technical Support