Solved

An unknown error occurred while validating the server under DNS

Posted on 2012-03-15
5
8,042 Views
Last Modified: 2012-03-15
I have an issue with one of my Windows 2008 R2 DC's and that when I go under DNS on the server and under Forward Lookup Zones and then under NameServers.

When I click the resolve button I get an error "An unknown error occurred while validating the server".

DNS Error
I have read that for some it is fixed by enabling IPv6 and I have done that and also I have tried disabling my firewall but I still get this error.

Thanks
K.
0
Comment
Question by:kerry_dsouza
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
  • 2
5 Comments
 
LVL 16

Expert Comment

by:Syed_M_Usman
ID: 37723807
could you please let me know how many Dc you have?

what type of DNS you are running? is it integrated ?
are any serevr running secondary zones?
how many DC/GC you have in your domain

can you open cmd>nslookup> put your domainname and enter.... do you recive any error?
0
 

Author Comment

by:kerry_dsouza
ID: 37723861
@Syed

In this particular site I have only one DCGC and  if you are asking over-all in all our different AD sites we have about 40 DCGC's

It is running AD-Integrated DNS and yes when I open the command prompt and say

nslookup <domain name> I get a a list of all my DC's in my domain and I dont get an error
0
 
LVL 12

Accepted Solution

by:
Vaseem Mohammed earned 500 total points
ID: 37724173
If your network is not configured to use IPv6, the error is obvious. when you are resolving the IPv4, it can resolve without any errors.
0
 

Author Comment

by:kerry_dsouza
ID: 37724196
Ok, Thanks!
0
 
LVL 16

Expert Comment

by:Syed_M_Usman
ID: 37724211
this could be for many reasons;

make sure you have A and NS record for the DC

try to run dcdiag /v on this dc and check if there is any error?

Try to put DC IPV4 ip address and check? or the serevr name... make sure the DC is not behind the firewall , or the windows firewall is not blocking...
0

Featured Post

Are your AD admin tools letting you down?

Managing Active Directory can get complicated.  Often, the native tools for managing AD are just not up to the task.  The largest Active Directory installations in the world have relied on one tool to manage their day-to-day administration tasks: Hyena. Start your trial today.

Question has a verified solution.

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

Suggested Solutions

This article explains the steps required to use the default Photos screensaver to display branding/corporate images
This article demonstrates probably the easiest way to configure domain-wide tier isolation within Active Directory. If you do not know tier isolation read https://technet.microsoft.com/en-us/windows-server-docs/security/securing-privileged-access/s…
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 video shows how to use Hyena, from SystemTools Software, to bulk import 100 user accounts from an external text file. View in 1080p for best video quality.

730 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