Solved

ISP Change and DNS resolution

Posted on 2014-02-21
4
209 Views
Last Modified: 2014-02-26
Hi

We are changing our ISP and I am trying to remember how Active Directory integrated DNS (which is what we are using) gets or resolves its external forward and reverse DNS information?  IE, where does the server look to, to pull this information?  an external DNS server provided by our ISP?  This was all pre-configured years ago and before my time.

We are using windows server 2003 and I went into dnsmgmt ->properties-> forwarders tab and under DNS domain to use "all other DNS domains" as apposed to configured IP addresses.

What I am worried about, is that I am not looking in the right area, and that when we change ISPs, our external DNS resolution will cease.  Am I looking in the right area and does the setting use "all other DNS domains" force our DNS server to transparently look to any external DNS servers to pull down outside DNS information, or is the setting I am after somewhere else and need to be manually configured with our new ISPs DNS servers?

thanks
0
Comment
Question by:CnicNV
  • 3
4 Comments
 
LVL 4

Assisted Solution

by:Jeffery Hayes
Jeffery Hayes earned 250 total points
ID: 39877194
This should help.

http://technet.microsoft.com/en-us/library/cc779380(v=ws.10).aspx

Along with are there any DNS Records like Type A or MX for Mail Servers?

If so you would want to update these as well on your servers if applicable.

Hope this helps you out.
0
 

Author Comment

by:CnicNV
ID: 39877408
I am just wondering for the purposes of our internal host computers being able to continue external DNS resolution with the ISP change if anything needs to be done at all with regards to the setting use "all other DNS domains" in the forwarder tab?  There are no other IP listed in there, IE no ISP DNS server IPs or anything at all other than "all other DNS domains".   is that by it's self sufficient?

Thanks again
0
 

Accepted Solution

by:
CnicNV earned 0 total points
ID: 39878059
0
 

Author Closing Comment

by:CnicNV
ID: 39888297
I discovered that I dont need to use forwarders, that the default root hint servers listed are what our dns servers are pulling everything down on.  According to the link i post above, using forwarders can speed up dns resolution but introduce single points of failure if they go down.  For example using your ISPs DNS servers.

One user even recommends only pointing to forwarders that you have control over.
0

Featured Post

What is SQL Server and how does it work?

The purpose of this paper is to provide you background on SQL Server. It’s your self-study guide for learning fundamentals. It includes both the history of SQL and its technical basics. Concepts and definitions will form the solid foundation of your future DBA expertise.

Question has a verified solution.

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

Are you one of those front-line IT Service Desk staff fielding calls, replying to emails, all-the-while working to resolve end-user technological nightmares? I am! That's why I have put together this brief overview of tools and techniques I use in o…
I'm a big fan of Windows' offline folder caching and have used it on my laptops for over a decade.  One thing I don't like about it, however, is how difficult Microsoft has made it for the cache to be moved out of the Windows folder.  Here's how to …
This video Micro Tutorial explains how to clone a hard drive using a commercial software product for Windows systems called Casper from Future Systems Solutions (FSS). Cloning makes an exact, complete copy of one hard disk drive (HDD) onto another d…
Windows 8 comes with a dramatically different user interface known as Metro. Notably missing from the new interface is a Start button and Start Menu. Many users do not like it, much preferring the interface of earlier versions — Windows 7, Windows X…

813 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

12 Experts available now in Live!

Get 1:1 Help Now