[AusNOG] Microsoft missing RDNS

[Mal]

You might want to re-read your query output Joshua..




Mal



On 12/06/2021 8:03 am, Joshua Stark wrote:
> 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
>> * Email mike at matilda.net.au
>> <mailto:mike at matilda.net.au>Website www.matilda.net.au
>> <http://www.matilda.net.au/>
>>
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>>
>>
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