resolution problem

[Matus UHLAR - fantomas]

On 18.05.16 14:10, Con Wieland wrote:
>I am having an issue resolving www.cloudsat.cira.colostate.edu from 2 of my
> name servers.  I have 2 others with identical configs that resolve
> correctly.  A normal lookup shows a server fail but a +trace looks ok. 
> Any ideas how to better troubleshoot the issue?

tried web dns checkers? Some of them use to provide useful results.

>dig www.cloudsat.cira.colostate.edu @ns1.service.uci.edu
[...]
>;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 1057


>colostate.edu.          172800  IN      NS      dns1.colostate.edu.
>colostate.edu.          172800  IN      NS      dns3.colostate.edu.
>;; Received 119 bytes from 192.41.162.30#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       129.82.109.62
>;; Received 83 bytes from 129.82.103.121#53(dns1.colostate.edu) in 36 ms

often a problem of invalid NS delegation, or bad TTL (A record for a server
expires before NS record).
-- 
Matus UHLAR - fantomas, uhlar at fantomas.sk ; http://www.fantomas.sk/
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