at 716-821-7171
From: Adam David
Sent: Wednesday, September 22, 2021 7:17 PM
To: Brown, William
Cc: Erik Stian Tefre ; dns-operations@lists.dns-oarc.net
Subject: Re: [dns-operations] Oddness with Cloudfare authoritative servers
This email originated from outside of the organizatio
On Thu, 2021-09-23 at 14:35 -0400, Warren Kumari wrote:
> Whatever the case, the fact that William was experiencing issues when this
> particular address was returned, and it seems to be the only one that
> responds in this way when no SNI is provided is, um, interesting.
As far as I have seen,
On Thu, Sep 23, 2021 at 9:34 AM Peter van Dijk
wrote:
> On Wed, 2021-09-22 at 20:13 -0400, Warren Kumari wrote:
> > Oh, testing now gives a different / working result:
> >
> > $ curl -v https://www.deltamath.com --connect-to
> > deltamath.com:443:172.64.80.1
> 2>&1 | grep "HTTP/2 200"
> >
>
>
Cloudflare in particular is experimenting with returning different IP
addresses to different queries for all kinds of reasons:
https://mislove.org/publications/IP-Unbound-SIGCOMM.pdf
On Wed, Sep 22, 2021 at 1:29 PM Warren Kumari wrote:
>
>
> On Wed, Sep 22, 2021 at 1:01 PM Brown, William
On Wed, 2021-09-22 at 20:13 -0400, Warren Kumari wrote:
> Oh, testing now gives a different / working result:
>
> $ curl -v https://www.deltamath.com --connect-to
> deltamath.com:443:172.64.80.1 2>&1 | grep "HTTP/2 200"
>
This one sends a Server Name Indication of www.deltamath.com (like with
If you are a DeltaMath customer, then you need to contact them directly.
>>
>> Sincerely,
>>
>> Adam Vallee
>>
>>
>>
>> On Wed, Sep 22, 2021 at 4:03 PM Brown, William wrote:
>>
>>> From: dns-operations On Behalf Of
>>&g
t;> Erik Stian Tefre
>> Sent: Wednesday, September 22, 2021 3:38 PM
>> To: dns-operations@lists.dns-oarc.net
>> Subject: Re: [dns-operations] Oddness with Cloudfare authoritative servers
>>
>> > Possibly not a DNS issue at all, but something like this:
>&
On Wed, Sep 22, 2021 at 7:38 PM Ethan Katz-Bassett
wrote:
> Cloudflare in particular is experimenting with returning different IP
> addresses to different queries for all kinds of reasons:
> https://mislove.org/publications/IP-Unbound-SIGCOMM.pdf
>
Yup — but in this case, at least one of the
to contact them directly.
Sincerely,
Adam Vallee
On Wed, Sep 22, 2021 at 4:03 PM Brown, William wrote:
> From: dns-operations On Behalf Of
> Erik Stian Tefre
> Sent: Wednesday, September 22, 2021 3:38 PM
> To: dns-operations@lists.dns-oarc.net
> Subject: Re: [dns-operations] Oddness
Tefre
> Sent: Wednesday, September 22, 2021 3:38 PM
> To: dns-operations@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.c
From: dns-operations On Behalf Of Erik
Stian Tefre
Sent: Wednesday, September 22, 2021 3:38 PM
To: dns-operations@lists.dns-oarc.net
Subject: Re: [dns-operations] Oddness with Cloudfare authoritative servers
> Possibly not a DNS issue at all, but something like this:
>
On 2021-09-22 19:28, Warren Kumari wrote:
On Wed, Sep 22, 2021 at 1:01 PM Brown, William wrote:
We have a school district that is trying to resolve the domain
deltamath.com [1]. This issue is impacting the classroom use of
this service.
The authoritative servers are tani.ns.cloudflare.com
On Wed, Sep 22, 2021 at 1:01 PM Brown, William wrote:
> We have a school district that is trying to resolve the domain
> deltamath.com. This issue is impacting the classroom use of this service.
>
>
>
> The authoritative servers are tani.ns.cloudflare.com and
> jarred.ns.cloudfare.com. Tani
We have a school district that is trying to resolve the domain deltamath.com.
This issue is impacting the classroom use of this service.
The authoritative servers are tani.ns.cloudflare.com and
jarred.ns.cloudfare.com. Tani seems to work correctly. Jarred however, will
return two different
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