Debugging XDMCP with GDM

I'm trying to run XDCMP with GDM (2.3) Freebsd 8.0. My custom.conf in /usr/local/gdm/custom.conf is:
Code:
# GDM configuration storage

[xdmcp]
Enable=true
HonorIndirect=1
MaxPending=4
Port=177
[chooser]

[security]

[debug]

in /var/log/gdm I get the following four files:
Code:
192.168.2.3:0-slave.log		
192.168.2.3:0-slave.log.1
192.168.2.3:0-slave.log.2
192.168.2.3:0-slave.log.3
192.168.2.3:0-slave.log.4
The contents of the files are:

Code:
gdm-simple-slave[43600]: WARNING: Unable to connect to display 192.168.2.3:0
gdm-simple-slave[43600]: WARNING: Unable to connect to display 192.168.2.3:0
gdm-simple-slave[43600]: WARNING: Unable to connect to display 192.168.2.3:0
gdm-simple-slave[43600]: WARNING: Unable to connect to display 192.168.2.3:0
gdm-simple-slave[43600]: WARNING: Unable to connect to display 192.168.2.3:0
gdm-simple-slave[43600]: WARNING: Unable to connect to display 192.168.2.3:0
gdm-simple-slave[43600]: WARNING: Unable to connect to display 192.168.2.3:0
gdm-simple-slave[43600]: WARNING: Unable to connect to display 192.168.2.3:0
gdm-simple-slave[43600]: WARNING: Unable to connect to display 192.168.2.3:0
gdm-simple-slave[43600]: WARNING: Unable to connect to display 192.168.2.3:0

I'm using cygwin-x on a windows xp machine. I've made sure that port 177udp and 6000tcp are open. I'm not running a firewall on my freebsd machine. I'm starting the xserver on the XP machine with a -query 192.168.2.5 (the freebsd machine ip) option.

Can anyone suggest some further approach to debugging this?

Thanks

Mike
 
Bringing this old topic back to the top - check your firewall settings and allow Cygwin's X server for incoming connections from your internal IP's.
 
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