Maintained by: NLnet Labs

[Unbound-users] AD bit set for NXDOMAIN but should not?

David Blacka
Tue Mar 1 00:52:04 CET 2011

On Feb 28, 2011, at 11:07 AM, W.C.A. Wijngaards wrote:

> Example B.1 in RFC5155 is wrong, and it should be changed to have the
> optout flag removed from the nextcloser NSEC3
> (0p9mhaveqvm6t7vbl5lop2u3t2rp3tom).
> (with the optout flag set, the example is insecure, and also the
> wildcard denial has to be removed).

Where in 5155 does it say that the NXDOMAIN proof is different in the opt-out case?  My memory (and a quick search through 5155) is that only the insecure referral proof is different with Opt-Out.

AFAICT example B.1 is correct.  The examples don't show the AD bit status (they are showing the responses from the authoritative server), but I thought section 9.2 was clear enough.

David Blacka                          <davidb at> 
Principal Engineer    Verisign Platform Product Development