[BlueOnyx:25524] Re: Strange DNS goings on

[Ken Hohhof]

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> 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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