nanog mailing list archives
Cloudflare DNS contact?
From: Betsy Schwartz via NANOG <nanog () lists nanog org>
Date: Mon, 6 Apr 2026 22:08:56 -0400
We're getting reports of users trying to log in or request 2FA emails from
Cloudflare sites (ex: California DMV) but seeing errors that our well.com
domain isn't recognized as valid. Well.com has been around since 1993 and
our primary DNS hasn't changed since perhaps 2012. . Excerpts appended for
reference.
I strongly suspect these errors are related to a Cloudflare security check
for valid email domains. Hoping someone here can validate or disprove
this. If it's a Cloudflare issue, any contacts here?
When I poke at an open cloudflare DNS server and look up the A for well.com
I get a disturbing error: :
server can't find well.com.well.sf.ca.us:
well.sf.ca.us is an antique (but valid) A record in the sf.ca.us zone
and has no business appearing here. Did something drop a period or CRLF
on a list somewhere?
When I query AWS and Google DNS servers, our DNS looks correct and
unchanged
Thank you very much for any pointers!
Betsy
--
Correct info:
set type=any well.com
Server: 8.8.8.8
Address: 8.8.8.8#53
Non-authoritative answer:
Name: well.com
Address: 23.22.72.90
well.com nameserver = ns-1783.awsdns-30.co.uk.
well.com nameserver = ns-1103.awsdns-09.org.
well.com nameserver = ns-805.awsdns-36.net.
well.com nameserver = ns-459.awsdns-57.com.
well.com
origin = ns-1103.awsdns-09.org
mail addr = awsdns-hostmaster.amazon.com
<snip>
well.com mail exchanger = 15 xmx.well.com.
<snip>
--
whois well.com
[Querying whois.verisign-grs.com]
Domain Name: WELL.COM
Registry Domain ID: 4562093_DOMAIN_COM-VRSN
Registrar WHOIS Server: whois.enom.com
Registrar URL: http://www.enomdomains.com
Updated Date: 2020-01-24T18:46:10Z
Creation Date: 1993-01-25T05:00:00Z
Registry Expiry Date: 2029-01-26T05:00:00Z
<snip>
Name Server: NS-1103.AWSDNS-09.ORG
Name Server: NS-1783.AWSDNS-30.CO.UK
Name Server: NS-459.AWSDNS-57.COM
Name Server: NS-805.AWSDNS-36.NET
<snip>
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Current thread:
- Cloudflare DNS contact? Betsy Schwartz via NANOG (Apr 06)
- Re: Cloudflare DNS contact? Alexander Huynh via NANOG (Apr 06)
- Re: Cloudflare DNS contact? Chris Adams via NANOG (Apr 06)
- Re: Cloudflare DNS contact? Vinny Abello via NANOG (Apr 06)
- Re: Cloudflare DNS contact? marka via NANOG (Apr 06)
- Re: Cloudflare DNS contact? Steve Sullivan via NANOG (Apr 07)
- Re: Cloudflare DNS contact? Betsy Schwartz via NANOG (Apr 07)
- Re: Cloudflare DNS contact? Steve Sullivan via NANOG (Apr 07)
- Re: Cloudflare DNS contact? Steve Sullivan via NANOG (Apr 07)
