[GTER] Problema resolucao dns

Network Operation Center AlfainfNet noc at alfainfnet.com.br
Tue Sep 25 16:44:06 -03 2012


Boa tarde.

 

Estou com um stress de resolução dns a dias. Domínio “calcadoslupie.com.br”.

Assim que o mesmo expira o ttl de cache,  server recursivo não resolve mais
o domínio somente forçando um DIG em cima de outro server, assim entrando
novamente em seu cache e então volta a resolver.

Fiz várias análises, em outros server resolve normal, porem achei algo
estranho e entao resolvi trocar uma ideia com o grupo:

Observem:

 

[root at dns3 logs]# dig calcadoslupie.com.br @f.dns.br

; <<>> DiG 9.7.3-P3 <<>> calcadoslupie.com.br @f.dns.br

;; global options: +cmd

;; Got answer:

;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 34529

;; flags: qr rd; QUERY: 1, ANSWER: 0, AUTHORITY: 2, ADDITIONAL: 0

;; WARNING: recursion requested but not available

 

;; QUESTION SECTION:

;calcadoslupie.com.br.  IN A

 

;; AUTHORITY SECTION:

calcadoslupie.com.br. 86400 IN NS ns1.interfacevirtual.com.

calcadoslupie.com.br. 86400 IN NS ns2.interfacevirtual.com.

 

;; Query time: 22 msec

;; SERVER: 200.219.159.10#53(200.219.159.10)

;; WHEN: Tue Sep 25 16:22:48 2012

;; MSG SIZE  rcvd: 94

 

===========================================================

 

[root at dns3 logs]# dig interfacevirtual.com @a.gtld-servers.net

; <<>> DiG 9.7.3-P3 <<>> interfacevirtual.com @a.gtld-servers.net

;; global options: +cmd

;; Got answer:

;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 39838

;; flags: qr rd; QUERY: 1, ANSWER: 0, AUTHORITY: 2, ADDITIONAL: 0

;; WARNING: recursion requested but not available

 

;; QUESTION SECTION:

;interfacevirtual.com.  IN A

 

;; AUTHORITY SECTION:

interfacevirtual.com. 172800 IN NS ns1.meta358.org.

interfacevirtual.com. 172800 IN NS ns2.meta358.org.

 

;; Query time: 128 msec

;; SERVER: 192.5.6.30#53(192.5.6.30)

;; WHEN: Tue Sep 25 16:35:16 2012

;; MSG SIZE  rcvd: 85

 

 

[root at dns3 logs]# dig interfacevirtual.com @ns1.meta358.org

 

; <<>> DiG 9.7.3-P3 <<>> interfacevirtual.com @ns1.meta358.org

;; global options: +cmd

;; Got answer:

;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 8950

;; flags: qr aa rd; QUERY: 1, ANSWER: 1, AUTHORITY: 2, ADDITIONAL: 2

;; WARNING: recursion requested but not available

 

;; QUESTION SECTION:

;interfacevirtual.com.  IN A

 

;; ANSWER SECTION:

interfacevirtual.com. 14400 IN A 67.228.172.192

 

;; AUTHORITY SECTION:

interfacevirtual.com. 86400 IN NS ns1.interfacevirtual.com.

interfacevirtual.com. 86400 IN NS ns2.interfacevirtual.com.

 

;; ADDITIONAL SECTION:

ns1.interfacevirtual.com. 14400 IN A 67.228.172.192

ns2.interfacevirtual.com. 14400 IN A 67.228.172.193

 

;; Query time: 156 msec

;; SERVER: 67.228.172.192#53(67.228.172.192)

;; WHEN: Tue Sep 25 16:36:34 2012

;; MSG SIZE  rcvd: 122

 

 

De fato o server autoritativo que responde pelo dominio
“interfacevirtual.com” eh o ns1/ns2.meta358.org, porem na zona no mesmo
constam outros NS, ns1/ns2.interfacevirtual.com. No meu entendimento deveria
ter na zona interfacevirtual.com os NS ns1/ns2.meta358.org ou entao nos
GTLD-Servers deveria estar com NS e IP da zona interfacevirtual.com.

Isto é um equívoco?

Pode estar causando estas falhas de resolucao?

Rodo dns recursivo com dnssec habilitado.

 

 

 

 

 

 

 

Gabriel V. Longo

inoc-dba 262883:100

noc at alfainfnet.com.br

http://www.alfainfnet.com.br <http://www.alfainfnet.com.br/> 

 




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