[AusNOG] Microsoft missing RDNS

[Joshua Stark]

Hi Mike,

Those two IPs have a reverse for me, do they work for you now since 
opening your ticket with MS?

% dig -x 40.92.63.85 ; <<>> DiG 9.10.6 <<>> -x 40.92.63.85 ;; global 
options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: 
NXDOMAIN, id: 25838 ;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 
1, ADDITIONAL: 1 ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 1460

;; QUESTION SECTION: ;85.63.92.40.in-addr.arpa.    IN    PTR

;; AUTHORITY SECTION: 92.40.in-addr.arpa.    300    IN    SOA    
ns1-07.azure-dns.com. azuredns-hostmaster.microsoft.com. 1 3600 300 
2419200 300

% dig -x 40.92.62.31 ; <<>> DiG 9.10.6 <<>> -x 40.92.62.31 ;; global 
options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: 
NXDOMAIN, id: 53408 ;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 
1, ADDITIONAL: 1

;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 1460

;; QUESTION SECTION: ;31.62.92.40.in-addr.arpa.    IN    PTR ;; 
AUTHORITY SECTION: 92.40.in-addr.arpa.    300    IN    SOA    
ns1-07.azure-dns.com. azuredns-hostmaster.microsoft.com. 1 3600 300 
2419200 300


Thanks
Josh


*Joshua Stark*
Email: starkjs at gmail.com

On 11/6/21 09:17, Mike Manning wrote:
>
> Hi all,
>
> Anyone else here experiencing missing RDNS for a swath of IP’s from 
> Microsoft on a few different subnets? I’ve opened a ticket with 
> Microsoft netops for it and I’ve done an rDNS bypass on our local 
> antispam filter however we’re now seeing o365 clients with the same 
> issue when trying to receive emails from anyone with an @outlook.com 
> or @msn.com email address.. where do you draw the line in adding 
> bypass after bypass?
>
> host 40.92.63.85
>
> Host 85.63.92.40.in-addr.arpa. not found: 3(NXDOMAIN)
>
> host 40.92.62.31
>
> Host 31.62.92.40.in-addr.arpa. not found: 3(NXDOMAIN)
>
> *Mike Manning*
> *Network Engineer*
>
> *Matilda Internet*
> ________________
>
> (Telephone +61 7 4953 0711
> (Fax +61 7 4849 5000
> 29 Gregory Street, Mackay, QLD 4740, Australia
> *Emailmike at matilda.net.au
> <mailto:mike at matilda.net.au>Websitewww.matilda.net.au
> <http://www.matilda.net.au/>
>
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