[BlueOnyx:25525] Re: Strange DNS goings on

[Colin Jack]

Thanks Ken,

That is my point . I can look up from CLI and it works but none of these online checkers can find CNAMES. Odd.

Colin

From: Blueonyx <blueonyx-bounces at mail.blueonyx.it> on behalf of Ken Hohhof <khohhof at kwom.com>
Reply to: BlueOnyx General Mailing List <blueonyx at mail.blueonyx.it>
Date: Sunday, 24 July 2022 at 20:05
To: 'BlueOnyx General Mailing List' <blueonyx at mail.blueonyx.it>
Subject: [BlueOnyx:25524] Re: Strange DNS goings on


Not sure what that CNAME query at dnschecker.org does, but as long as a regular A query for autodiscover.flintevos.co.uk returns the correct results, does it matter?



Here's what I get (I'm in the US):



C:\Users\khohhof>nslookup

Default Server:  ns2.dns.rcn.net

Address:  208.59.247.45



> autodiscover.flintevos.co.uk

Server:  ns2.dns.rcn.net

Address:  208.59.247.45



Non-authoritative answer:

Name:    autodiscover.cloudplatform1.com

Addresses:  51.140.78.157

          51.140.253.155

Aliases:  autodiscover.flintevos.co.uk



> server 8.8.8.8

Default Server:  dns.google

Address:  8.8.8.8



> autodiscover.flintevos.co.uk

Server:  dns.google

Address:  8.8.8.8



Non-authoritative answer:

Name:    autodiscover.cloudplatform1.com

Addresses:  51.140.253.155

          51.140.78.157

Aliases:  autodiscover.flintevos.co.uk



> server 1.1.1.1

Default Server:  one.one.one.one

Address:  1.1.1.1



> autodiscover.flintevos.co.uk

Server:  one.one.one.one

Address:  1.1.1.1



Non-authoritative answer:

Name:    autodiscover.cloudplatform1.com

Addresses:  51.140.253.155

          51.140.78.157

Aliases:  autodiscover.flintevos.co.uk



>



And if I specifically do a CNAME query, that seems to work also.



C:\Users\khohhof>nslookup

Default Server:  ns2.dns.rcn.net

Address:  208.59.247.45



> set type=CNAME

> autodiscover.flintevos.co.uk

Server:  ns2.dns.rcn.net

Address:  208.59.247.45



Non-authoritative answer:

autodiscover.flintevos.co.uk    canonical name = autodiscover.cloudplatform1.com

>



-----Original Message-----
From: Blueonyx <blueonyx-bounces at mail.blueonyx.it> On Behalf Of Colin Jack
Sent: Sunday, July 24, 2022 1:24 PM
To: BlueOnyx General Mailing List <blueonyx at mail.blueonyx.it>
Subject: [BlueOnyx:25523] Strange DNS goings on



We have customer’s IT guys having difficulty with CNAMES on our servers.



If they use something like dnschecker.org it doesn’t return any CNAME records. Returns all other records.



e.g

autodiscover.flintevos.co.uk



If I look up https://dnschecker.org/cname-lookup.php?query=flintevos.co.uk&dns=google I get no result.

If however I use dig I get



colin at Colins-MacBook-Pro ~ % dig @8.8.8.8 autodiscover.flintevos.co.uk



; <<>> DiG 9.10.6 <<>> @8.8.8.8 autodiscover.flintevos.co.uk



;; ANSWER SECTION:

autodiscover.flintevos.co.uk. 3600 IN     CNAME              autodiscover.cloudplatform1.com.

autodiscover.cloudplatform1.com. 104 IN           A              51.140.78.157

autodiscover.cloudplatform1.com. 104 IN           A              51.140.253.155



Anybody any idea what's going on?



Thanks



Colin





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