Review your favorite Linux distribution.
Go Back > Forums > Linux Forums > Linux - Software
User Name
Linux - Software This forum is for Software issues.
Having a problem installing a new program? Want to know which application is best for the job? Post your question in this forum.


  Search this Thread
Old 10-08-2007, 09:27 AM   #1
LQ Newbie
Registered: Jan 2006
Posts: 19

Rep: Reputation: 0
XDMCP connection failure

Hi all,

I'm having this XDMCP connection error.
Two linux servers: Fedora Core 6 Zod (x86-64), CentOS 5 (x86)
One Windows XP client with NetSarang's XManager Enterprise v2.0 (build 0501).

The servers have static IP addresses (i.e.,
When the client is given a static IP address (i.e. it can
connect to both servers.
When given a dynamic IP address (DHCP leases the client
connects only to Fedora server.

Using WireShark on client side I can track a successfull XDMCP connection:
...> XDMCP Query --> XDMCP Willing> XDMCP Request --> XDMCP Accept> XDMCP Manage --> TCP 41178 > X11 SYN> TCP X11 > 41178 SYN, ACK --> TCP 41178 > X11 ACK --> X11 initial connection request> X11 initial connection reply

... and an unsuccessfull XDMCP connection:
...> XDMCP Query --> XDMCP Willing> XDMCP Request --> XDMCP Accept> XDMCP Manage> XDMCP Manage> XDMCP Manage

Note here that DHCP is configured with option 46 (NetBIOS Node Type)
and the linux servers are using different primary DNS servers.
Note also that XDMCP connection to Fedora server is OK indifferent of
the nature of the IP address (static or dynamic) of the client !?!

I'm assuming that the failure lies on invalid magic cookie (MIT-MAGIC-COOKIE-1), due to incorrect use of DHCP and/or DNS settings on the
client side.

How can I nail this down ?

Thanks in advance,

Old 10-08-2007, 08:53 PM   #2
LQ Newbie
Registered: Oct 2007
Posts: 3

Rep: Reputation: 0
Have try adding your PC IP address to /etc/hosts?

This problem is most likely the DNS configuration issue. Check the forward and reverse lookup table.


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is Off
HTML code is Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Xmanger "XDMCP connection failed" on Redhat AS 5.0 xi_guadiy Linux - Server 5 07-09-2010 01:57 AM
XDMCP connection failure ganick Linux - Server 1 10-09-2007 12:41 PM
XDMCP Connection Problems da_tibmeister Linux - Networking 1 09-05-2006 05:04 PM
broadband connection failure jamna17 Linux - Networking 2 02-26-2005 08:49 AM
Dial-up Connection Failure ToeShot Linux - Networking 0 03-12-2002 10:41 PM > Forums > Linux Forums > Linux - Software

All times are GMT -5. The time now is 05:04 AM.

Main Menu
Write for LQ is looking for people interested in writing Editorials, Articles, Reviews, and more. If you'd like to contribute content, let us know.
Main Menu
RSS1  Latest Threads
RSS1  LQ News
Twitter: @linuxquestions
Facebook: linuxquestions Google+: linuxquestions
Open Source Consulting | Domain Registration