On Tue, Sep 07, 2021 at 12:33:59AM -0700, Ronald F. Guilmette <r...@tristatelogic.com> wrote a message of 33 lines which said:
> My question is rather a simple one. Given some FQDN `D' and given > some DNS record type 'T' (e.g. either A or AAAA or perhaps even PTR) > does there exist some open source command line tool that can tell me > the names of the DNS servers to which the final authority for > answering a query about the tuple (D, IN, T) is delegated? T is irrelevant since delegation does not depend on the type. > I know that I can get this information by using "dig +trace", but that seems > to be rather slow to me (wall clock time), and I want to be doing > this a lot. The only solution is chasing the delegations from the root (which is what dig +trace is doing). Caching speeds it, this is why it is better to go through your resolver than using dig +trace. > So, does anyone know of an open source command line tool that can do just > that, preferably quickly? I'm not aware of a tool (free software or not) which does it. Some programming will be required. _______________________________________________ Please visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe from this list ISC funds the development of this software with paid support subscriptions. Contact us at https://www.isc.org/contact/ for more information. bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users