Want to protect your cyber security and still get fast solutions? Ask a secure question today.Go Premium


What are the SOA settings in DNS

Posted on 2011-10-12
Medium Priority
Last Modified: 2012-05-12
Does the Primary DNS servers SOA serial number need to be lower than other DNS servers?

For Primary Server, do you enter the Primary DNS or is this supposed to be one of the other servers?

Also, what are the reccomended settings, not default, for refresh, retry, expire and minimum TTL

This is on Windows Server 2003, R2, running DNS

Thanks in advance for your help!
Question by:Lakebum32
LVL 13

Accepted Solution

Govvy earned 2000 total points
ID: 36957556
SOA Serial is incremented on the primary name server whenever a change is made and is used for other DNS server to compare if new changes need to be replicated

Primary Server can be PDC or any DNS server in domain

Recommended settings depend on your network and bandwidth:

Refresh (the time that a secondary name server gets a copy of the zone and the next time it checks to see if it needs a new copy) - 5 mins

Retry (primary name server should wait, if an attempt to refresh failed, before making another attempt to refresh) - in stable network is not required - 5 mins

Expires (the secondary name server know how long they can hold the information before it is no longer considered authoritative) - 7 days

TTL (the records in the zone are valid for) - 30 mins

Author Closing Comment

ID: 36958105
Thanks for the quick response.  I've implemented the time interval changes you reccomended.  I'm running down some DNS issues and this helps me eliminate some of the possibilities.

Featured Post

Concerto's Cloud Advisory Services

Want to avoid the missteps to gaining all the benefits of the cloud? Learn more about the different assessment options from our Cloud Advisory team.

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 …
BIND is the most widely used Name Server. A Name Server is the one that translates a site name to it's IP address. There is a new bug in BIND (https://kb.isc.org/article/AA-01272), affecting all versions of BIND 9 from BIND 9.1.0 (inclusive) thro…
The Relationships Diagram is a good way to get an overall view of what a database is keeping track of. It is also where relationships are defined. A relationship specifies how two tables connect to each other. As you build tables in Microsoft Ac…
Kernel Data Recovery is a renowned Data Recovery solution provider which offers wide range of softwares for both enterprise and home users with its cost-effective solutions. Let's have a quick overview of the journey and data recovery tools range he…
Suggested Courses
Course of the Month13 days, 15 hours left to enroll

581 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