LinuxQuestions.org - Can't get XDMCP via Xming to work

I have spent hours searching the internet on this one and haven't been able to find an answer to my problem.

I installed XDM on my computer which is running GRML 1.0.

I edited /etc/X11/xdm/Xaccess to have the following two lines uncommented:

Code:

*                            #any host can get a login window



*    CHOOSER BROADCAST      #any indirect host can get a chooser

I edited /etc/X11/xdm/xdm-config to have the following line uncommented:

Code:

!DisplayManager.requestPort: 0

I have my router set up to forward ports 177, 6000-6005, and 7100 for XDMCP, X11 protocol, and xfs respectively.

My goal is to use Xming to connect to my computer and get a graphical login prompt followed by a complete desktop via the following process

XLaunch.exe
Select One window and click Next
Select Open session via XDMCP and click Next
Type in the host to connect to and click Next
Click Next
Click Finish

When I click Finish, I get just a gray screen and my mouse pointer turns into an X. Here is the output I get when I run the following command:
tcpdump -s 0 -A udp port 177

Code:

09:54:01.027405 IP x.x.x.x.1694 > 192.168.1.43.xdmcp: UDP, length 7

E..#....m.gf.W.!...+......#1.......

09:54:01.082091 IP 192.168.1.43.xdmcp > x.x.x.x.1694: UDP, length 55

E..S..@.@.eN...+.W.!.....?.......1....arktischHolz..0 users, load: 0.03, 0.02, 0.09

09:54:01.246922 IP x.x.x.x.1694 > 192.168.1.43.xdmcp: UDP, length 87

E..s....m.g..W.!...+....._P......Q.........W.!.......MIT-MAGIC-COOKIE-1..XDM-AUTHORIZATION-1..XC-QUERY-SECURITY-1..

09:54:01.247050 IP 192.168.1.43.xdmcp > x.x.x.x.1694: UDP, length 52

E..P..@.@.eQ...+.W.!.....<%.........<.......MIT-MAGIC-COOKIE-1.....N...1.L...j..

09:54:01.296224 IP x.x.x.x.1694 > 192.168.1.43.xdmcp: UDP, length 29

E..9....m.gN.W.!...+.....%.....

....<.....MIT-unspecified

(I used 'x's to replace the outside IP address of the computer I'm trying to connect from)

I am not going to pretend to know how to read this, but from what I can tell, Xming is at least trying to connect and XDM is trying to authenticate it.

My question is, why doesn't it go any farther and let me actually login?