Enable XDMCP

Select this option to enable a remote X Windows System display to request an X Windows System session from the system. 

Honour indirect requests

Select this option to enable remote X Windows System displays that do not have a display manager to request XDMCP display management services from this system. 

Listen on UDP port

Use the spin box to specify the port number on which to listen for User Datagram Protocol (UDP) requests.

Maximum pending requests

Use the spin box to specify the maximum number of queued requests for sessions from the system. 

Use this option to help avoid denial of service attacks. This option specifies the number of displays that can request a session at one time. This option does not specify the total number of remote sessions which GDM allows.

Max pending indirect requests

GDM creates a queue of requests for sessions from the system. Use the spin box to specify the maximum number of queued requests for sessions from displays that do not have a display manager.

Maximum remote sessions

Use the spin box to specify the total number of remote sessions which GDM allows.

Maximum wait time

Use the spin box to specify how long to wait before GDM removes a request from the queued requests.

Maximum indirect wait time

Use the spin box to specify how long to wait before GDM removes displays that do not have a display manager, from the queue of displays that have requested sessions.

Displays per host

Use the spin box to specify the total number of sessions which GDM allows from a host.

Ping interval (minutes)

GDM pings sessions to check that the session is still active. Use the spin box to specify the interval between pings from GDM.