Problem resolving a host wenn TTL of NS-Servers runs out

[Colin Vidal]

Hi,

> Short version: When a NS has A and AAAA Records with different TTLs, a bind with
> only IPv4 fails to resolve an address once the A-Record expires and only the
> AAAA is left.

I think `query-source-v6 none;` in `options` should solve your problem.

https://bind9.readthedocs.io/en/v9.20.18/reference.html#namedconf-statement-query-source-v6

--
Colin Vidal -- colin at isc.org
Internet Systems Consortium