Help: BIND _ Recursive query

[Paul Kosinski]

I gather "recursion yes" (explicit or default) controls whether BIND
*does* recursion itself, in the sense of querying other DNS servers for
data it doesn't have, not whether it *issues* queries with the
"recursion desired" flag set. (Somewhat confusing terminology, in my
opinion.)

So is the "recursion desired" flag only set when there are forwarders?
Presumably it is set in the case of "forward only", but what happens if
there are forwarders defined and both "recursion yes" (default) and
"forward first" (default) are specified?


On Mon, 4 Mar 2019 19:30:36 +0100
Matus UHLAR - fantomas <uhlar at fantomas.sk> wrote:

> >On 4 Mar 2019, at 16:20, Paul Kosinski wrote:
> >> provides our users with general caching DNS service for
> >> all other domains.
> >
> >[...]
> >
> >> Its "named.conf" file doesn't list any "forwarders" any more, and
> >> "forward-only" is gone, but it still has a leftover "recursion yes"
> >> clause. Am I correct is assuming that this is now useless and can
> >> be removed?
> 
> On 04.03.19 16:33, Niall O'Reilly wrote:
> >If you want "general caching DNS service" to continue to work,
> >you'll need to keep "recursion yes".
> 
> actually "recursion yes;" is the default, so if you remove it, it
> stays set to yes (unless it's set to "no" somewhere).
> 
> recursion is the feature that allows BIND to resolve domains not
> configured locally, you surely need it enabled.