[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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