[dns-operations] Oddness with Cloudfare authoritative servers

Mark Andrews marka at isc.org
Wed Sep 22 20:58:12 UTC 2021


The correct thing to do is to contact the service provider and say that you are getting inconsistent
DNS results.  That when you only get back 172.64.80.1 it doesn’t work.

Mark

> On 23 Sep 2021, at 05:58, Brown, William <wbrown at e1b.org> wrote:
> 
> From: dns-operations <dns-operations-bounces at dns-oarc.net> On Behalf Of Erik Stian Tefre
> Sent: Wednesday, September 22, 2021 3:38 PM
> To: dns-operations at lists.dns-oarc.net
> Subject: Re: [dns-operations] Oddness with Cloudfare authoritative servers
> 
>> Possibly not a DNS issue at all, but something like this:
> 
>> https://community.cloudflare.com/t/revil-ransomware/301435
> 
>> (Executive summary: One Cloudflare IP being blocked by a firewall because of a different and misbehaving Cloudflare customer who happened to serve malicious content from that same IP.)
> 
>> Regards,
>> Erik
> 
> Interesting.  The real issue I am experiencing is that I am getting inconsistent responses from nominally the same authoritative server.  It just so happens that when we get 172.64.80.1 as the answer it fails.  I would prefer to get the correct answer so students can use the online educational resource the district is paying for.
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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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