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

x
?
Solved

DNS - use Internal or External (performance)

Posted on 2016-10-14
6
Medium Priority
?
56 Views
Last Modified: 2016-10-25
Hi
Can someone help me gauge whether or not its best to use internal DNS servers or use say the ISP DNS servers?
We are using internal, 4x DCs with DNS on over two sites recently performance of internet has dropped.  Not sure if this is o365 related or not either, however when a DC goes offline it causes much issue and takes a lot of time for logons to work etc.
Wondered if pointing DNS externally will help with the above or anything else?
thanks
0
Comment
Question by:CHI-LTD
  • 3
  • 2
6 Comments
 
LVL 22

Accepted Solution

by:
CompProbSolv earned 1000 total points
ID: 41843369
Are you asking if local workstations should use the local DCs or your ISP DNS servers for DNS?  Definitely the local DCs.  The primary reason is that your ISPs DNS servers won't know how to resolve local addresses which will cause you no end of problems.

You can configure the DNS servers in your local DCs to use the ISP DNS servers for forwarding if those servers seem reasonable.
0
 
LVL 7

Expert Comment

by:Niten Kumar
ID: 41843378
Logon problems means issues with your dc's.  What kind of problems do you have when a particular dc goes offline? How many sites do you have and how are the dc's distributed amongst the sites. Are sites properly defined and have you checked dc and replication health.
0
 
LVL 1

Author Comment

by:CHI-LTD
ID: 41843394
ok will leave clients pointing to local dcs.
will give server dns changes some more thought.

So if one DC was offline for maintenance other servers (not sure about clients) would say there are no logon servers to process account (or similar) but there is still one other DC available.  

I have 4x DCs.  2x at site a and 2 at site b.

The clients point to site a and also have the site b in the tcpip settings, but down the list.

dcdiag reports fine
0
New Tabletop Appliances Blow Competitors Away!

WatchGuard’s new T15, T35 and T55 tabletop UTMs provide the highest-performing security inspection in their class, allowing users at small offices, home offices and distributed enterprises to experience blazing-fast Internet speeds without sacrificing enterprise-grade security.

 
LVL 7

Expert Comment

by:Niten Kumar
ID: 41843400
Can you type set at command prompt on the machines that cause logon problems and check what is displayed under logon server
0
 
LVL 7

Assisted Solution

by:Niten Kumar
Niten Kumar earned 1000 total points
ID: 41843401
The computers at site b should output the one of the dcs at site b as the logon server. Likewise for site a.
0
 
LVL 1

Author Closing Comment

by:CHI-LTD
ID: 41858303
let using local, but may look at pointing internal DNS servers to Google.
0

Featured Post

Simplify Active Directory Administration

Administration of Active Directory does not have to be hard.  Too often what should be a simple task is made more difficult than it needs to be.The solution?  Hyena from SystemTools Software.  With ease-of-use as well as powerful importing and bulk updating capabilities.

Question has a verified solution.

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

Let's recap what we learned from yesterday's Skyport Systems webinar.
High user turnover can cause old/redundant user data to consume valuable space. UserResourceCleanup was developed to address this by automatically deleting user folders when the user account is deleted.
This tutorial will walk an individual through the process of transferring the five major, necessary Active Directory Roles, commonly referred to as the FSMO roles from a Windows Server 2008 domain controller to a Windows Server 2012 domain controlle…
This Micro Tutorial hows how you can integrate  Mac OSX to a Windows Active Directory Domain. Apple has made it easy to allow users to bind their macs to a windows domain with relative ease. The following video show how to bind OSX Mavericks to …
Suggested Courses

971 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