non-improving referral

Mark Andrews marka at isc.org
Tue Jul 6 00:20:02 UTC 2021



> On 6 Jul 2021, at 06:40, @lbutlr <kremels at kreme.com> wrote:
> 
> I've been getting a few errors along these lines (bind 9.16.18), the IPs changes, but I don't know what "non0improving referral" means or if I should be concerned. 
> 
> DNS format error from 64.70.78.82#53 resolving ok.contact/NS for 127.0.0.1#16749: non-improving referra
> 
> This IP is  owned bv CenturyLink, which was the company providing our Internet service (they have recently become something called "Lumen", but the IP blocks respond as savvin.net).
> 
> Other IPs have appeared, but I did not note them as the logs rolled as I was distracted by other issues at the time.
> 
> My concern is that they may point to a configuration issue on my end, though dnsviz is happy.

This is an error with the delegation of ok.contact.  The NS records at the delegation point do
not match those at the zone apex.

> -- 
> Bart, don't use the Touch of Death on your sister.
> 
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-- 
Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742              INTERNET: marka at isc.org



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