Problem with caching domain

Breno Silveira Soares breno.soares at serpro.gov.br
Thu Aug 6 21:40:31 UTC 2009


Is there a solution to this? Or only correct external domain?
This happen with your bind server?

Thanks.
Breno.


Kevin Darcy escreveu:
> Yes, ns1.geap.com.br and ns2.geap.com.br are both CNAMEs. Pointing NS 
> records at CNAMEs is not only illegal, but causes real problems, as 
> you can see.
>
>                                                                         
>                                          - Kevin
>
> Breno Silveira Soares wrote:
>> Hi list,
>>
>> I'm using bind 9.6.1.
>> I have problem with resolving an external name www.geap.com.br.
>> The first time quering the server, it's work. But when the TTL of www 
>> record expires, the server returns SERVFAIL.
>> And when I execute "rndc flush" it's work as the first time.
>>
>> The dump cache of my server shows:
>>
>> ; ns2.geap.com.br [v4 TTL 98] [v6 TTL 98] [v4 failure] [v6 failure]
>> ; ns1.geap.com.br [v4 TTL 98] [v6 TTL 98] [v4 failure] [v6 failure]
>> ; glue
>> 75.88.201.in-addr.arpa. 389     NS      ns1.geap.com.br.
>>                         389     NS      ns2.geap.com.br.
>> ; glue
>> geap.com.br.            81544   NS      ns1.geap.com.br.
>>                         81544   NS      ns2.geap.com.br.
>> ; glue
>> ns1.geap.com.br.        81544   A       201.88.75.3
>> ; glue
>> ns2.geap.com.br.        81544   A       201.88.75.7
>> -----------------------
>>
>> The NS of domain uses CNAME:
>>
>> ns1.geap.com.br.        3600    IN      CNAME   srvneonio.geap.com.br.
>> srvneonio.geap.com.br.  3600    IN      A       201.88.75.3
>> ns2.geap.com.br.        3600    IN      CNAME   
>> srvcriptonio.geap.com.br.
>> srvcriptonio.geap.com.br. 3600  IN      A       201.88.75.7
>>
>> ----------------------
>> $ dig @centauro www.geap.com.br
>>
>> ; <<>> DiG 9.2.4 <<>> @centauro www.geap.com.br
>> ;; global options:  printcmd
>> ;; Got answer:
>> ;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 1213
>> ;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0
>>
>> ;; QUESTION SECTION:
>> ;www.geap.com.br.               IN      A
>>
>> ;; Query time: 1 msec
>> ;; SERVER: 161.148.1.17#53(centauro)
>> ;; WHEN: Thu Aug  6 16:11:34 2009
>> ;; MSG SIZE  rcvd: 33
>>
>>
>> It's something related with glue records or using NS with CNAME or 
>> [v4 failure] in the cache ?
>>
>> Thanks.
>>
>>


-- 
Ats,
Breno S. Soares
Analista de Redes
SERPRO/SUPRE/REBHE
Tel: (31) 3311-6825



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