Solved

Need some help with split DNS

Posted on 2014-03-05
5
285 Views
Last Modified: 2014-04-21
I am not the best at DNS, but here goes. In our gateway I specify the DNS as to use 8.8.8.8 and 4.2.2.2. My first question is, is this best practice? I have a Windows environment, and one of my servers has DNS installed for local lookups.

I am asking this question because while on the office wifi, corporate e-mail doesnt work. My DNS is not set up as .local, it is set up as the external domain name. While researching a fix for this issue, it recommends setting up split DNS. To do this, I would need to set up a new forward primary zone that is not AD integrated. My second question is what effect(s) will this have on my domain PC's?
0
Comment
Question by:j_crow1
[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
5 Comments
 
LVL 4

Expert Comment

by:Jason Ryberg
ID: 39907968
Why is the office wifi set to point to your mail's external domain?  If it's connected to your LAN, it should use the internal DNS server.
0
 

Author Comment

by:j_crow1
ID: 39908061
It's not; the Aps use the same DNS setup as the internal office machines. It's the phones that look at the external mail address.
0
 
LVL 10

Expert Comment

by:Pramod Ubhe
ID: 39908995
try using your office dns server's IP as primary dns and keep 8.8.8.8 / 4.2.2.2 as alternate dns on one of the computer to see if it works.
0
 
LVL 4

Expert Comment

by:Jason Ryberg
ID: 39909650
In our gateway I specify the DNS as to use 8.8.8.8 and 4.2.2.2

On your DNS servers, do you have forwarders pointing to the gateway as a DNS source?  Otherwise you could set forwarders to the 8.8.8.8 and 4.2.2.2 IP addresses.  Is there a reason you're not using your ISP's DNS?
0
 
LVL 26

Accepted Solution

by:
DrDave242 earned 500 total points
ID: 39912869
In our gateway I specify the DNS as to use 8.8.8.8 and 4.2.2.2.
Is that gateway also the DHCP server for your network? If so, then it's likely giving those DNS server addresses out to DHCP clients, which isn't good if you've got an AD domain in place (and it sounds like you probably do).

All machines in an AD domain need to use only internal DNS servers (DNS servers in your domain, which are typically going to be domain controllers), because those are the only DNS servers that know anything about the machines in your domain. Using external DNS servers such as 8.8.8.8 and 4.2.2.2 will result in machines in your domain not being able to contact other machines in your domain.

I am asking this question because while on the office wifi, corporate e-mail doesnt work. My DNS is not set up as .local, it is set up as the external domain name.
Can you be more specific about this? What do you use for corporate email, and does your AD domain have the same name as your registered internet domain? If so, that's not ideal, but there's probably still a way to make everything work like it should.
0

Featured Post

Industry Leaders: 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!

Question has a verified solution.

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

I wrote this article to explain some important DNS concepts that should be known to avoid some typical configuration errors I often see in forums. I assume that what is described here is the typical behavior of Microsoft DNS client. I don't know …
OfficeMate Freezes on login or does not load after login credentials are input.
This tutorial will show how to push an installation of Backup Exec to an additional server in both 2012 and 2014 versions of the software. Click on the Backup Exec button in the upper left corner. From here, select Installation and Licensing, then I…
This tutorial will show how to configure a single USB drive with a separate folder for each day of the week. This will allow each of the backups to be kept separate preventing the previous day’s backup from being overwritten. The USB drive must be s…

733 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