Solved

Why does Windows need UDP connection from workstation UPD 138 and 389 to domain server it doesn't authenticate to?

Posted on 2006-06-13
5
347 Views
Last Modified: 2006-11-18
Our workstations authenticate to a local DC.  From analyzing network traffic, they also seem to connect to UDP 138 and 389.  I'm not sure why.  Can anyone provide good solid explinations?  The stations don't seem to work otherwise.
0
Comment
Question by:awakenings
  • 3
5 Comments
 

Author Comment

by:awakenings
ID: 16897208
UDP 138 is just NetBIOS.  The UDP 389 is LDAP ping.  Why is that needed?  There are ACL's blocking.  Any reason why these serves provent the station from functioning?
0
 
LVL 33

Accepted Solution

by:
NJComputerNetworks earned 500 total points
ID: 16897221
not sure... maybe this other server is providing other services like GC.  Can you better explain your environment and setup.....

Need more details...
0
 

Author Comment

by:awakenings
ID: 16897275
The other server was the first DC.  It is at another site.  The local server is at our site.  Both are the same domain.  Both are DCs.  The stations log in to the local DC as they should.  They have the UDP connection attempts to the far DC.  I'm trying to determine why.  There are denies on network syslog for those services and probably prevent some things like changing passwords, etc.  Any idea why?

Awakenings
0
 

Author Comment

by:awakenings
ID: 16993818
I've got everything worked out.  I'll give you points anyway.
0
 

Expert Comment

by:emaud
ID: 21830795
Hi awakenings
we are curious to know what was the problem?
Thanks
0

Featured Post

Netscaler Common Configuration How To guides

If you use NetScaler you will want to see these guides. The NetScaler How To Guides show administrators how to get NetScaler up and configured by providing instructions for common scenarios and some not so common ones.

Join & Write a Comment

Recently, I had the need to build a standalone system to run a point-of-sale system. I’m running this on a low-voltage Atom processor, so I wanted a light-weight operating system, but still needed Windows. I chose to use Microsoft Windows Server 200…
Scenerio: You have a server running Server 2003 and have applied a retail pack of Terminal Server Licenses.  You want to change servers or your server has crashed and you need to reapply the Terminal Server Licenses. When you enter the 16-digit lic…
This video discusses moving either the default database or any database to a new volume.
This tutorial demonstrates a quick way of adding group price to multiple Magento products.

746 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

10 Experts available now in Live!

Get 1:1 Help Now