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
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