When a query for a DNS record is made to a non-authoritative server and it isn’t cached. The non-authoritative server makes a query to the authoritative server. When the authoritative server sends its response it tells the non-authoritative server how long to cache the response.
The TTL can be found in the SOA record which can be queried from the authoritative server using a tool called “dig”. Dig is a much more capable and feature rich tool than nslookup and can be found on most Linux distributions.
Those updates are normally fast, at least with the old DNS at ucsd.edu, a half hour or so when I query the Google DNS, it depends.
Strange that they didn't show up if you didn't make a mistake. Try it a second time, it will tell you or the same entry was already there,
and refuses to do it in that case, at least with the old one.
Bob VE3TOK
On 2024-04-24 17:41, G4FDL via 44net wrote:
> I made some DNS changes to my subdomain yesterday and around 2 hours later they showed up in DNS when I used nslookup. I later made some more amendments but it's now 24 hours later and they still don't show.
>
> Are the changes transferred in batches? if so what is the update frequency?
>
> Thanks
>
> Max
>
> G4FDL
>
> _______________________________________________
--
There is nothing permanent except change
-Heraclitus
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