.com domain names suddenly don't resolve anymore on our DNS server

Earlier today our 2 DNS servers stopped resolving any domain name with .com. I can access all other domain names, internal, but for external I can only access .org, .edu, .net, etc, but cannot access .com domains. I have never seen this before. Any ideas?
LVL 1
nismor240sxAsked:
Who is Participating?
 
nismor240sxAuthor Commented:
So after hours of messing with it, it turned out an employee added a DNS entry for ".com" all by itself. I eventually found it on the list of my DNS records and once I deleted it, everything worked.
0
 
Zephyr ICTCloud ArchitectCommented:
Is it Windows 2008 R2 ?

There is a KB that might be interesting: http://support.microsoft.com/kb/2508835
0
 
djStraTTosCommented:
Do you host private DNS servers to resolve internet URLs? I believe that you use forwarders on your internal DNS server that handle all the non internal DNS resolutions?
I guess it's a problem at your ISP side. Have you contacted them already? What was their reply?
0
WEBINAR: 10 Easy Ways to Lose a Password

Join us on June 27th at 8 am PDT to learn about the methods that hackers use to lift real, working credentials from even the most security-savvy employees. We'll cover the importance of multi-factor authentication and how these solutions can better protect your business!

 
Jan SpringerCommented:
I would recommend installing dig and:

dig domain.com +trace

from within the c:/dig directory
0
 
djStraTTosCommented:
@_jesper_ great tool mate! Thanks for sharing!!!
0
 
nismor240sxAuthor Commented:
I contacted the ISP and they reported everything was fine on the reverse DNS, etc. Finally after hours of searching I was able to figure it out.
0
Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

All Courses

From novice to tech pro — start learning today.