Solved

Multiple SOA A records

Posted on 2009-05-12
7
625 Views
Last Modified: 2012-05-06
Windows 2003 r2 DNS

I have multiple SOA A records listed on internal DNS servers.  These records point to other non NS server IPs on the LAN, but am not sure why they are even registered as SOA A records.

Why would I have these extra SOA A records?
0
Comment
Question by:ARob720
  • 4
  • 3
7 Comments
 
LVL 13

Expert Comment

by:3nerds
ID: 24367753
Can you give me an example.

The only thing that I could think that may require that would be if you have multiple sub-domains and want separate SOA for each sub domain. for example

Taken from: http://whatexit.org/tal/mywritings/dnssoa.html

fast.com.   IN SOA      ns1.fast.com. dude.fast.com. (
                        883081600 ;serial (version)
                        3600      ;refresh period
                        600       ;retry refresh this often
                        2592000   ;expiration period
                        1800      ;minimum TTL
                        )

2.fast.com.   IN SOA      ns1.2.fast.com. dude.fast.com. (
                        883081600 ;serial (version)
                        3600      ;refresh period
                        600       ;retry refresh this often
                        2592000   ;expiration period
                        1800      ;minimum TTL
                        )


Regards,

3nerds
0
 

Author Comment

by:ARob720
ID: 24368245
I am calling it an SAO because they lists the name as (Same as Parent Folder) but in actually they are A records.  Is there a purpose to have multiple (Sam as Parent Folder) A records for multiple servers across the domain?  There are also (Same as Parent..) NS records but I can understand why those would exist.
0
 
LVL 13

Expert Comment

by:3nerds
ID: 24368322
Right Click on the name of you forward lookup zone and select properties
Click the Name server tab
Do the servers listed there match the extra A records listed?
0
How your wiki can always stay up-to-date

Quip doubles as a “living” wiki and a project management tool that evolves with your organization. As you finish projects in Quip, the work remains, easily accessible to all team members, new and old.
- Increase transparency
- Onboard new hires faster
- Access from mobile/offline

 

Author Comment

by:ARob720
ID: 24368488
5 NS that are listed in the NS tab.  All have a corresponding (same as parent...)  NS and A records.  Then I have 2 other (same as parent...) A records that correspond to non NS servers around the domain.  

After further investigation the remaining 2 IPs are for replicating AD machines that are not running DNS.
0
 
LVL 13

Accepted Solution

by:
3nerds earned 250 total points
ID: 24368518
So I think you just answered the question.

The first 5 were created when you added those server to the NS tab the other 2 were added for AD replication. If all records point to active DNS or AD boxes they are necessary.

Regards,

3nerds
0
 
LVL 13

Expert Comment

by:3nerds
ID: 24368543
If you no longer use those IP addresses as Name servers then you can remove them from the name server tab which I believe asks you or removes the A records automatically. Been a bit to remember exactly.

Hit submit a bit to quick =)
0
 

Author Comment

by:ARob720
ID: 24368592
No, I it looks like everything adds up, NS servers with NS and A records and AD (only) servers with only A Records.

Thanks for getting me there.
0

Featured Post

6 Surprising Benefits of Threat Intelligence

All sorts of threat intelligence is available on the web. Intelligence you can learn from, and use to anticipate and prepare for future attacks.

Join & Write a Comment

Moving your enterprise fax infrastructure from in-house fax machines and servers to the cloud makes sense — from both an efficiency and productivity standpoint. But does migrating to a cloud fax solution mean you will no longer be able to send or re…
Resolve DNS query failed errors for Exchange
When you create an app prototype with Adobe XD, you can insert system screens -- sharing or Control Center, for example -- with just a few clicks. This video shows you how. You can take the full course on Experts Exchange at http://bit.ly/XDcourse.
This tutorial demonstrates a quick way of adding group price to multiple Magento products.

758 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

21 Experts available now in Live!

Get 1:1 Help Now