Odd A record in our hosts zone file
Eric Germann
ekgermann at semperen.com
Fri Jun 25 18:13:18 UTC 2021
Time to live in the cache. Short time to live is useful when you need to change the A record to swing one host to another.
> On Jun 25, 2021, at 12:56, Bruce Johnson <johnson at pharmacy.arizona.edu> wrote:
>
> I ran across these A records in one of our zone files:
>
> ;EXCHANGE STUFF
> mail 1m IN A xxx.xxx.xxx.52; dhbex1
> mail 1m IN A xxx.xxx.xxx.54; dhbex2
>
> I can see that this is a cheap load-balancing for our exchange OWA servers, but what is the ‘1m’ notation? I haven’t been able to find that in my searching of the manual.
>
> (We’re adding new servers and I need to make sure our DNS is properly set for them.)
>
> --
> Bruce Johnson
> University of Arizona
> College of Pharmacy
> Information Technology Group
>
> Institutions do not have opinions, merely customs
>
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