[dns-operations] Microsoft NS server oddness
pettit at yahoo-inc.com
Fri Jun 15 18:45:13 UTC 2012
Nobody from Microsoft ever responded (FWIW).
We were seeing intermittent REFUSED responses from their servers. I suspected it might be related to the mis-matched TTLs. Since then, the TTLs have been synced, and we haven't seen the REFUSED problem any more.
On Jun 15, 2012, at 2:54 AM, Chris Thompson wrote:
> On Jun 15 2012, Mark K. Pettit wrote:
>> Can someone from Microsoft please contact me off-list? We have been noticing
>> a few odd behaviors regarding some Microsoft domains.
>> Specifically, the TTL of the various address records for the NS-set for
>> microsoft.com are/were not consistent:
>> ;; ADDITIONAL SECTION:
>> ns1.msft.net. 2480 IN A 188.8.131.52
>> ns1.msft.net. 42936 IN AAAA 2a01:111:2005::1:1
>> ns2.msft.net. 2480 IN A 184.108.40.206
>> ns2.msft.net. 42936 IN AAAA 2a01:111:2006:6::1:1
>> ns3.msft.net. 2480 IN A 220.127.116.11
>> ns3.msft.net. 42936 IN AAAA 2a01:111:2020::1:1
>> ns4.msft.net. 2480 IN A 18.104.22.168
>> ns4.msft.net. 42936 IN AAAA 2404:f800:2003::1:1
>> ns5.msft.net. 2480 IN A 22.214.171.124
>> ns5.msft.net. 42936 IN AAAA 2a01:111:200f:1::1:1
> What is wrong (technically speaking) with that? The A and AAAA
> records don't have to have the same TTL.
> They do seem to have made them uniformly 3600 st the authoritative
> servers now.
> I could find other things to complain about them, though, such as
> how they don't support EDNS, and the IPv6 addresses seem not to
> be working from here...
> Chris Thompson University of Cambridge Computing Service,
> Email: cet1 at ucs.cam.ac.uk New Museums Site, Cambridge CB2 3QH,
> Phone: +44 1223 334715 United Kingdom.
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