How can I tell if a quiry is answered or denied

Wed Apr 20 22:34:20 UTC 2022

On 2022-04-20 23:07, Richard T.A. Neal wrote:
> Hi Hal,
> 
> In addition to this you might also want to look into Response Rate
> Limiting. This may help to reduce the load on your DNS servers from
> bad actors without having to play a cat & mouse game of spotting and
> blocking them.
> 
> Response Rate Limiting is explained in detail in the BIND ARM here
> (scroll down to section 4.2.16.19):
> 
> https://downloads.isc.org/isc/bind9/9.18.2/doc/arm/html/reference.html

how well does this work with very low $TTL in zone file ?

https://blog.apnic.net/2019/11/12/stop-using-ridiculously-low-dns-ttls/