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I'm configuring a DNS service for the first time which involves a master DNS server and a slave DNS server. On investigating why the slave zones were not updating after I make edits to the zones on the master DNS, I discovered that the serial value in the zones (on master and slave) needs to:

(a) Be different (b) Increment in the master zones in order for the files to be copied across.

Does this mean when a new client machine is added to the master zone files, I would always need to remember to change the serial value in each file? Or is there another solution for this which I'm missing?

Thanks

treetop
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2 Answers2

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Does this mean when a new client machine is added to the master zone files, I would always need to remember to change the serial value in each file?

Yes the serial number must be incremented after each change to a zone.
The serial number is how slaves keep track if they need to update their cached copy of the zone, or not.

HBruijn
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you will need to increment this every time you make changes to master zone. For more info: https://www.rfc-editor.org/rfc/rfc2182

Community
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Martynas Saint
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