On Wed, Apr 1, 2015 at 4:37 PM, John Levine <jo...@taugh.com> wrote: > >Good point, I was only thinking of recursive answers, and I don't think I > see SOAs there all the time. We can add > >that NODATA responses for authoritative responses include the SOA. > > A very short survey reveals that unbound and 8.8.8.8 return SOA, bind > doesn't. So it's not all the time, but it's pretty common. > > R's, > John >
Hmm, my quick test indicates that BIND (at least BIND 9.10.x) does return SOA (acting as a resolver). Not only common, but also helpful - additonal downstream resolvers and caching stubs can use this info to cache non-existence. Shumon.
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