Go Premium for a chance to win a PS4. Enter to Win

x
  • Status: Solved
  • Priority: Medium
  • Security: Public
  • Views: 257
  • Last Modified:

Internal / external DNS

I have a domain mydomain.com  I also have an external POP3 mail server mail.mydomain.com.  when I try to resolve mail.mydomain.com internally it resolves to and old external IP address.  (we just switched mail carriers) Externally mail.mydomain.com resolves correctly to the new external IP.  I looked in DNS and there is not any records pointing to the old IP.  I looked at the HOSTS file on the server and there is no entry's.

Any place I can look to find out where this pointer to the old IP address is?  Also I was going to just put in a new A Record to point mail.mydomain.com to the new IP address but I would receive this error message.

host record mail.mydomain.com can not be created node is a cname dns record.

Any Ideas?
0
Corporal_K
Asked:
Corporal_K
  • 3
  • 2
1 Solution
 
Mandeep KhalsaCommented:
Try "ipconfig /flushdns" from the command prompt to clear the cached DNS entries on your DNS server.
0
 
David Johnson, CD, MVPOwnerCommented:
It may be set at the registrar of your domain
0
 
Corporal_KAuthor Commented:
ipconfig /flushdns is the first thing I tried.  I even rebooted the server.  For a work around I added the entry's for mail.mydomain.com and www.mydomain.com to the hosts file and then it resolves to the correct IP.  Problem is I do not want to edit the hosts file on all the computers.  Also if I remove the hosts entry's it reverts back to the old IP address.

@David  This works externally fine so can't be the registrar or I don't see how it could be???
0
VIDEO: THE CONCERTO CLOUD FOR HEALTHCARE

Modern healthcare requires a modern cloud. View this brief video to understand how the Concerto Cloud for Healthcare can help your organization.

 
Mandeep KhalsaCommented:
Have you checked your DNS's PTR records as well? Maybe a reversing entry there is what is causing this? And you only have 1 DNS server correct?
0
 
Corporal_KAuthor Commented:
Problem is resolved.  The issue was there were A records pointing to the old IP address.  The entry's did not show because there was a filter on the list.  I have never used the filter so I did not even know it was there.
0
 
Corporal_KAuthor Commented:
There were DNS entry's
0

Featured Post

Independent Software Vendors: We Want Your Opinion

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

  • 3
  • 2
Tackle projects and never again get stuck behind a technical roadblock.
Join Now