<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"><head><meta http-equiv=Content-Type content="text/html; charset=utf-8"><meta name=Generator content="Microsoft Word 15 (filtered medium)"><style><!--
/* Font Definitions */
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
/* Style Definitions */
p.MsoPlainText, li.MsoPlainText, div.MsoPlainText
{mso-style-priority:99;
mso-style-link:"Plain Text Char";
margin:0in;
font-size:11.0pt;
font-family:"Calibri",sans-serif;}
span.PlainTextChar
{mso-style-name:"Plain Text Char";
mso-style-priority:99;
mso-style-link:"Plain Text";
font-family:"Calibri",sans-serif;}
.MsoChpDefault
{mso-style-type:export-only;
font-family:"Calibri",sans-serif;}
@page WordSection1
{size:8.5in 11.0in;
margin:1.0in 1.0in 1.0in 1.0in;}
div.WordSection1
{page:WordSection1;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]--></head><body lang=EN-US link="#0563C1" vlink="#954F72" style='word-wrap:break-word'><div class=WordSection1><p class=MsoPlainText>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? <o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>Here's what I get (I'm in the US):<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText><span style='font-size:10.0pt;font-family:"Courier New";color:#4472C4'>C:\Users\khohhof>nslookup<o:p></o:p></span></p><p class=MsoPlainText><span style='font-size:10.0pt;font-family:"Courier New";color:#4472C4'>Default Server: ns2.dns.rcn.net<o:p></o:p></span></p><p class=MsoPlainText><span style='font-size:10.0pt;font-family:"Courier New";color:#4472C4'>Address: 208.59.247.45<o:p></o:p></span></p><p class=MsoPlainText><span style='font-size:10.0pt;font-family:"Courier New";color:#4472C4'><o:p> </o:p></span></p><p class=MsoPlainText><span style='font-size:10.0pt;font-family:"Courier New";color:#4472C4'>> autodiscover.flintevos.co.uk<o:p></o:p></span></p><p class=MsoPlainText><span style='font-size:10.0pt;font-family:"Courier New";color:#4472C4'>Server: ns2.dns.rcn.net<o:p></o:p></span></p><p class=MsoPlainText><span style='font-size:10.0pt;font-family:"Courier New";color:#4472C4'>Address: 208.59.247.45<o:p></o:p></span></p><p class=MsoPlainText><span style='font-size:10.0pt;font-family:"Courier New";color:#4472C4'><o:p> </o:p></span></p><p class=MsoPlainText><span style='font-size:10.0pt;font-family:"Courier New";color:#4472C4'>Non-authoritative answer:<o:p></o:p></span></p><p class=MsoPlainText><span style='font-size:10.0pt;font-family:"Courier New";color:#4472C4'>Name: autodiscover.cloudplatform1.com<o:p></o:p></span></p><p class=MsoPlainText><span style='font-size:10.0pt;font-family:"Courier New";color:#4472C4'>Addresses: 51.140.78.157<o:p></o:p></span></p><p class=MsoPlainText><span style='font-size:10.0pt;font-family:"Courier New";color:#4472C4'> 51.140.253.155<o:p></o:p></span></p><p class=MsoPlainText><span style='font-size:10.0pt;font-family:"Courier New";color:#4472C4'>Aliases: autodiscover.flintevos.co.uk<o:p></o:p></span></p><p class=MsoPlainText><span style='font-size:10.0pt;font-family:"Courier New";color:#4472C4'><o:p> </o:p></span></p><p class=MsoPlainText><span style='font-size:10.0pt;font-family:"Courier New";color:#4472C4'>> server 8.8.8.8<o:p></o:p></span></p><p class=MsoPlainText><span style='font-size:10.0pt;font-family:"Courier New";color:#4472C4'>Default Server: dns.google<o:p></o:p></span></p><p class=MsoPlainText><span style='font-size:10.0pt;font-family:"Courier New";color:#4472C4'>Address: 8.8.8.8<o:p></o:p></span></p><p class=MsoPlainText><span style='font-size:10.0pt;font-family:"Courier New";color:#4472C4'><o:p> </o:p></span></p><p class=MsoPlainText><span style='font-size:10.0pt;font-family:"Courier New";color:#4472C4'>> autodiscover.flintevos.co.uk<o:p></o:p></span></p><p class=MsoPlainText><span style='font-size:10.0pt;font-family:"Courier New";color:#4472C4'>Server: dns.google<o:p></o:p></span></p><p class=MsoPlainText><span style='font-size:10.0pt;font-family:"Courier New";color:#4472C4'>Address: 8.8.8.8<o:p></o:p></span></p><p class=MsoPlainText><span style='font-size:10.0pt;font-family:"Courier New";color:#4472C4'><o:p> </o:p></span></p><p class=MsoPlainText><span style='font-size:10.0pt;font-family:"Courier New";color:#4472C4'>Non-authoritative answer:<o:p></o:p></span></p><p class=MsoPlainText><span style='font-size:10.0pt;font-family:"Courier New";color:#4472C4'>Name: autodiscover.cloudplatform1.com<o:p></o:p></span></p><p class=MsoPlainText><span style='font-size:10.0pt;font-family:"Courier New";color:#4472C4'>Addresses: 51.140.253.155<o:p></o:p></span></p><p class=MsoPlainText><span style='font-size:10.0pt;font-family:"Courier New";color:#4472C4'> 51.140.78.157<o:p></o:p></span></p><p class=MsoPlainText><span style='font-size:10.0pt;font-family:"Courier New";color:#4472C4'>Aliases: autodiscover.flintevos.co.uk<o:p></o:p></span></p><p class=MsoPlainText><span style='font-size:10.0pt;font-family:"Courier New";color:#4472C4'><o:p> </o:p></span></p><p class=MsoPlainText><span style='font-size:10.0pt;font-family:"Courier New";color:#4472C4'>> server 1.1.1.1<o:p></o:p></span></p><p class=MsoPlainText><span style='font-size:10.0pt;font-family:"Courier New";color:#4472C4'>Default Server: one.one.one.one<o:p></o:p></span></p><p class=MsoPlainText><span style='font-size:10.0pt;font-family:"Courier New";color:#4472C4'>Address: 1.1.1.1<o:p></o:p></span></p><p class=MsoPlainText><span style='font-size:10.0pt;font-family:"Courier New";color:#4472C4'><o:p> </o:p></span></p><p class=MsoPlainText><span style='font-size:10.0pt;font-family:"Courier New";color:#4472C4'>> autodiscover.flintevos.co.uk<o:p></o:p></span></p><p class=MsoPlainText><span style='font-size:10.0pt;font-family:"Courier New";color:#4472C4'>Server: one.one.one.one<o:p></o:p></span></p><p class=MsoPlainText><span style='font-size:10.0pt;font-family:"Courier New";color:#4472C4'>Address: 1.1.1.1<o:p></o:p></span></p><p class=MsoPlainText><span style='font-size:10.0pt;font-family:"Courier New";color:#4472C4'><o:p> </o:p></span></p><p class=MsoPlainText><span style='font-size:10.0pt;font-family:"Courier New";color:#4472C4'>Non-authoritative answer:<o:p></o:p></span></p><p class=MsoPlainText><span style='font-size:10.0pt;font-family:"Courier New";color:#4472C4'>Name: autodiscover.cloudplatform1.com<o:p></o:p></span></p><p class=MsoPlainText><span style='font-size:10.0pt;font-family:"Courier New";color:#4472C4'>Addresses: 51.140.253.155<o:p></o:p></span></p><p class=MsoPlainText><span style='font-size:10.0pt;font-family:"Courier New";color:#4472C4'> 51.140.78.157<o:p></o:p></span></p><p class=MsoPlainText><span style='font-size:10.0pt;font-family:"Courier New";color:#4472C4'>Aliases: autodiscover.flintevos.co.uk<o:p></o:p></span></p><p class=MsoPlainText><span style='font-size:10.0pt;font-family:"Courier New";color:#4472C4'><o:p> </o:p></span></p><p class=MsoPlainText><span style='font-size:10.0pt;font-family:"Courier New";color:#4472C4'>><o:p> </o:p></span></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>And if I specifically do a CNAME query, that seems to work also.<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText><span style='font-size:10.0pt;font-family:"Courier New";color:#4472C4'>C:\Users\khohhof>nslookup<o:p></o:p></span></p><p class=MsoPlainText><span style='font-size:10.0pt;font-family:"Courier New";color:#4472C4'>Default Server: ns2.dns.rcn.net<o:p></o:p></span></p><p class=MsoPlainText><span style='font-size:10.0pt;font-family:"Courier New";color:#4472C4'>Address: 208.59.247.45<o:p></o:p></span></p><p class=MsoPlainText><span style='font-size:10.0pt;font-family:"Courier New";color:#4472C4'><o:p> </o:p></span></p><p class=MsoPlainText><span style='font-size:10.0pt;font-family:"Courier New";color:#4472C4'>> set type=CNAME<o:p></o:p></span></p><p class=MsoPlainText><span style='font-size:10.0pt;font-family:"Courier New";color:#4472C4'>> autodiscover.flintevos.co.uk<o:p></o:p></span></p><p class=MsoPlainText><span style='font-size:10.0pt;font-family:"Courier New";color:#4472C4'>Server: ns2.dns.rcn.net<o:p></o:p></span></p><p class=MsoPlainText><span style='font-size:10.0pt;font-family:"Courier New";color:#4472C4'>Address: 208.59.247.45<o:p></o:p></span></p><p class=MsoPlainText><span style='font-size:10.0pt;font-family:"Courier New";color:#4472C4'><o:p> </o:p></span></p><p class=MsoPlainText><span style='font-size:10.0pt;font-family:"Courier New";color:#4472C4'>Non-authoritative answer:<o:p></o:p></span></p><p class=MsoPlainText><span style='font-size:10.0pt;font-family:"Courier New";color:#4472C4'>autodiscover.flintevos.co.uk canonical name = autodiscover.cloudplatform1.com<o:p></o:p></span></p><p class=MsoPlainText><span style='font-size:10.0pt;font-family:"Courier New";color:#4472C4'>><o:p> </o:p></span></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>-----Original Message-----<br>From: Blueonyx <blueonyx-bounces@mail.blueonyx.it> On Behalf Of Colin Jack<br>Sent: Sunday, July 24, 2022 1:24 PM<br>To: BlueOnyx General Mailing List <blueonyx@mail.blueonyx.it><br>Subject: [BlueOnyx:25523] Strange DNS goings on</p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>We have customer’s IT guys having difficulty with CNAMES on our servers.<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>If they use something like dnschecker.org it doesn’t return any CNAME records. Returns all other records.<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>e.g <o:p></o:p></p><p class=MsoPlainText>autodiscover.flintevos.co.uk<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>If I look up <a href="https://dnschecker.org/cname-lookup.php?query=flintevos.co.uk&dns=google"><span style='color:windowtext;text-decoration:none'>https://dnschecker.org/cname-lookup.php?query=flintevos.co.uk&dns=google</span></a> I get no result.<o:p></o:p></p><p class=MsoPlainText>If however I use dig I get<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>colin@Colins-MacBook-Pro ~ % dig @8.8.8.8 autodiscover.flintevos.co.uk<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>; <<>> DiG 9.10.6 <<>> @8.8.8.8 autodiscover.flintevos.co.uk<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>;; ANSWER SECTION:<o:p></o:p></p><p class=MsoPlainText>autodiscover.flintevos.co.uk. 3600 IN CNAME autodiscover.cloudplatform1.com.<o:p></o:p></p><p class=MsoPlainText>autodiscover.cloudplatform1.com. 104 IN A 51.140.78.157<o:p></o:p></p><p class=MsoPlainText>autodiscover.cloudplatform1.com. 104 IN A 51.140.253.155<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>Anybody any idea what's going on?<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>Thanks<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>Colin<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>_______________________________________________<o:p></o:p></p><p class=MsoPlainText>Blueonyx mailing list<o:p></o:p></p><p class=MsoPlainText><a href="mailto:Blueonyx@mail.blueonyx.it"><span style='color:windowtext;text-decoration:none'>Blueonyx@mail.blueonyx.it</span></a><o:p></o:p></p><p class=MsoPlainText><a href="http://mail.blueonyx.it/mailman/listinfo/blueonyx"><span style='color:windowtext;text-decoration:none'>http://mail.blueonyx.it/mailman/listinfo/blueonyx</span></a><o:p></o:p></p></div></body></html>