Help DNS

Tony Finch dot at dotat.at
Mon Aug 24 12:13:57 UTC 2015


Daniel Ryslink <daniel.ryslink at dialtelecom.cz> wrote:
>
> As for the SERIAL in SOA, it's just a good practice, it gives you the
> information about when the zone was published, and creates less problems
> when you transfer hosting of the domain to another nameserver. Basically
> yes, it's just a number, but there is no real good reason not to use the
> recommended format.

There are good reasons depending on the tools you use for automatically
maintaining your zones.

For dynamic zones, BIND before version 9.9 could only increment the serial
number. If you wanted it to be a date stamp you would have to explicitly
adjust the serial number in your UPDATE request. (For instance, nsdiff -S
date will do this for you.)

BIND 9.9 and later have a serial-update-method option which allows you to
choose increment or unixtime modes. But not ISO 8601 style date stamps.

Tony.
-- 
f.anthony.n.finch  <dot at dotat.at>  http://dotat.at/
Viking, North Utsire: Easterly 4 or 5, increasing 6 at times. Slight or
moderate, but rough in southwest Viking. Showers later. Good, occasionally
poor later.


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