UDP/TCP problem in cross-realm authentication

miguel.sanders@arcelormittal.com miguel.sanders at arcelormittal.com
Fri May 22 05:09:59 EDT 2009


Have you rebooted after setting MaxPacketSize? (It's Windows you know...) :-) 


Met vriendelijke groet
Best regards
Bien à vous

Miguel SANDERS
ArcelorMittal Gent

UNIX Systems & Storage
IT Supply Western Europe | John Kennedylaan 51
B-9042 Gent

T +32 9 347 3538 | F +32 9 347 4901 | M +32478 805 023
E miguel.sanders at arcelormittal.com
www.arcelormittal.com/gent

-----Oorspronkelijk bericht-----
Van: kerberos-bounces at mit.edu [mailto:kerberos-bounces at mit.edu] Namens Bjoern Tore Sund
Verzonden: vrijdag 22 mei 2009 11:05
Aan: kerberos at mit.edu
Onderwerp: UDP/TCP problem in cross-realm authentication


We have linux clients in an MIT Kerberos realm (1.6.3), Windows XP SP3 clients in AD and  two-way trust configured.  Accessing AD resources from Linux clients work perfectly.

Accessing resources in the MIT Kerberos realm from Windows fails more often than not.  Lots of packet sniffing shows fragmented UDP packets which the unix server isn't able to reassemble.  So, in accordance with
http://support.microsoft.com/kb/244474 we've set HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\Lsa\
Kerberos\Parameters\MaxPacketSize to 1 on the XP clients.  Still no go, they never try TCP (again sniffing both on the XP client and the unix kerberos server) but go straight for TCP.  TCP is working on the unix kerberos server, the linux clients are happily using it.  Have anyone seen MaxPacketSize fail to have effect before?  Any ideas on how to trace this further?

-BT
-- 
Bjørn Tore Sund       Phone: 555-84894   Email:   bjorn.sund at it.uib.no
IT department         VIP:   81724       Support: http://bs.uib.no
Univ. of Bergen

When in fear and when in doubt, run in circles, scream and shout.
________________________________________________
Kerberos mailing list           Kerberos at mit.edu
https://mailman.mit.edu/mailman/listinfo/kerberos

**** 
This message and any attachment are confidential, intended solely for the use of the individual or entity to whom it is addressed and may be protected by professional secrecy or intellectual property rights. 
If you have received it by mistake, or are not the named recipient(s), please immediately notify the sender and delete the message. You are hereby notified that any unauthorized use, copying or dissemination of any or all information contained in this message is prohibited. 
Arcelormittal shall not be liable for the message if altered, falsified, or in case of error in the recipient. 
This message does not constitute any right or commitment for ArcelorMittal except when expressly agreed otherwise in writing in a separate agreement.  
****  





More information about the Kerberos mailing list