Solved

Domain Trust DNS Problems

Posted on 2014-09-05
8
1,434 Views
Last Modified: 2014-09-05
Having some trouble with an external domain trust.  The networking portion is functional as I am able to ping ip addresses in both directions but I cannot ping host names from one side of the trust but I can ping hostnames from the other.

Conditional forwarders are validated and FQDN resolved.

Two Way External
Not Transitive

Both sides are 2003 functional level

DomainA
ServerA
Server2003

DomainB
ServerB
Server2008

I am able to ping hostnames from DomainA (from any server) on DomainB however, I cannot ping hostnames on DomainA from DomainB.  I can ping ip addresses/

This trust was functional at some point in the past but disabled - I don't think zone transfers/secordary servers were used but and I swear I was able to ping hostnames in both directions just a few days ago.
0
Comment
Question by:LenCepeda
  • 3
  • 3
  • 2
8 Comments
 
LVL 7

Expert Comment

by:Delete
ID: 40306665
When you say you can't ping hostnames, do you mean you can't ping the FQDN of a system in DomainA from DomainB?  Or is it only the shortname that you cannot ping?

When you perform the ping, does it resolve to the correct IP Address of the destination system?
0
 

Author Comment

by:LenCepeda
ID: 40306672
That is correct - I should I wrote I am unable to ping FQDN of a system in DomainA from DomainB.  

Yes, when I ping the FQDN it does resolve the correct ip address.  

Thank you for you quick response.
0
 
LVL 56

Expert Comment

by:Cliff Galiher
ID: 40306676
First, don't use ping to test DNS issues. Firewalls can easily block ICMP traffic and DNS as well as other traffic can work just fine. Not only is a failed ping a bad test for DNS, it may not even indicate a problem.

Use nslookup.
0
 
LVL 7

Expert Comment

by:Delete
ID: 40306691
As a test try disabling IPv6 if it is enabled (assuming your not using anything that is reliant on IPv6).
0
Ransomware-A Revenue Bonanza for Service Providers

Ransomware – malware that gets on your customers’ computers, encrypts their data, and extorts a hefty ransom for the decryption keys – is a surging new threat.  The purpose of this eBook is to educate the reader about ransomware attacks.

 

Author Comment

by:LenCepeda
ID: 40306721
Cliff I attempted nslookup and it wasn't able to find the other domain:  

****domainB can't find server: non-existent domain


Justing,
I disabled IPv6 on serverB- no change
0
 
LVL 56

Accepted Solution

by:
Cliff Galiher earned 500 total points
ID: 40306732
Then I'd check the conditional forwarder settings. Routes between the two domains. And, if necessary, follow the DNS packets themselves to see where they are getting stopped (again, firewall can be an issue) using something like wireshark at each hop.

Don't guess at random. These are simple troubleshooting steps that can pinpoint the problem definitively.
0
 
LVL 7

Expert Comment

by:Delete
ID: 40306737
Can you clarify what you mean by
Conditional forwarders are validated and FQDN resolved.
and how you validated those items if you say now you can't resolve DNS of DomainA from DomainB.

If you in fact cannot resolve DomainA from DomainB then you will need to follow Cliff's suggestions.
0
 

Author Closing Comment

by:LenCepeda
ID: 40306753
Alright - I deleted the conditional forwarded and recreated it and poof it worked!!!!
0

Featured Post

3 Use Cases for Connected Systems

Our Dev teams are like yours. They’re continually cranking out code for new features/bugs fixes, testing, deploying, testing some more, responding to production monitoring events and more. It’s complex. So, we thought you’d like to see what’s working for us.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Redirected folders in a windows domain can be quite useful for a number of reasons, one of them being that with redirected application data, you can give users more seamless experience when logging into different workstations.  For example, if a use…
OfficeMate Freezes on login or does not load after login credentials are input.
This tutorial will walk an individual through the steps necessary to configure their installation of BackupExec 2012 to use network shared disk space. Verify that the path to the shared storage is valid and that data can be written to that location:…
This tutorial will give a short introduction and overview of Backup Exec 2012 and how to navigate and perform basic functions. Click on the Backup Exec button in the upper left corner. From here, are global settings for the application such as conne…

895 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

11 Experts available now in Live!

Get 1:1 Help Now