schulz at adi.com
Tue May 24 15:14:29 UTC 2016
>>>>colostate.edu. 172800 IN NS dns1.colostate.edu.
>>>>colostate.edu. 172800 IN NS dns3.colostate.edu.
>>>>;; Received 119 bytes from 22.214.171.124#53(l.edu-servers.net) in 78 ms
>>>>www.cloudsat.cira.colostate.edu. 3600 IN CNAME dpc.cira.colostate.edu.
>>>>dpc.cira.colostate.edu. 3600 IN A 126.96.36.199
>>>>;; Received 83 bytes from 188.8.131.52#53(dns1.colostate.edu) in 36 ms
>>In article <mailman.812.1463666011.73610.bind-users at lists.isc.org>,
>> Matus UHLAR - fantomas <uhlar at fantomas.sk> wrote:
>>> often a problem of invalid NS delegation, or bad TTL (A record for a server
>>> expires before NS record).
> On 19.05.16 15:31, Sam Wilson wrote:
>>Glue A records for the nameservers have 172800 TTL, authoritative A
>>records have 1200.
> that's it!
> ;; ANSWER SECTION:
> colostate.edu. 3600 IN NS dns3.colostate.edu.
> colostate.edu. 3600 IN NS dns1.colostate.edu.
> ;; ADDITIONAL SECTION:
> dns3.colostate.edu. 1200 IN A 184.108.40.206
> dns1.colostate.edu. 1200 IN A 220.127.116.11
> after 1200 seconds, the A records expire, but the NS records don't.
> Next 2400 seconds you know that you have to ask dns3.colostate.edu and
> dns1.colostate.edu, but you can't find their IPs, because ... you don't
> know their IPs.
> while some DNS servers can cope with that, it's still broken setup.
Our server here running BIND 9.10.3-P4 seems to handle it OK. Do some
versions of Bind work with this broken setup while other versions do
not? I wonder what versions of Bind are running on the two servers
that do work and what versions on the two that do not.
> Matus UHLAR - fantomas, uhlar at fantomas.sk ; http://www.fantomas.sk/
> Warning: I wish NOT to receive e-mail advertising to this address.
> Varovanie: na tuto adresu chcem NEDOSTAVAT akukolvek reklamnu postu.
> I feel like I'm diagonally parked in a parallel universe.
Applied Dynamics Intl.
schulz at adi.com
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