XDMCP connection problem in linux [1]

I have changed the configuration as given in the link:
/products/xmg_faq.html#p5

Still I am getting "XDMCP connection failed" error. Actually, I have checked the UDP packets at the linux machine.. Its sending ICMP destination unreachable packet to the source. I guess, theres something that needs to be configured for opening port 177 for XDMCP connections.
Does anyone know whats the problem?

Bye,
Guru

You need to check the firewall settings of your Linux as explained at:

/products/xmg_faq.html#p2

If this doesn't help you, let us know more information about your systems:

- Linux vendor and version
- Xmanager version
- Detailed Network configuration

----
Technical Support