eu tenho problema com o armazenamento em cache do servidor DNS no Centos7, quando eu tento o exemplo do comando dig
dig www.google.com
Eu recebo esta saída
; <<>> DiG 9.9.4-RedHat-9.9.4-29.el7 <<>> www.google.fr
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 54269
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 1
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;www.google.fr. IN A
;; Query time: 0 msec
;; SERVER: 192.168.0.100#53(192.168.0.100)
;; WHEN: Wed Dec 14 06:26:02 CET 2016
;; MSG SIZE rcvd: 42
mas quando eu altero o dnssec-validation para no no /etc/named.conf ele funciona bem. qualquer ajuda
dig www.google.com
Eu recebo esta saída
dig google.com
; <<>> DiG 9.9.4-RedHat-9.9.4-29.el7 <<>> google.com
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 39355
;; flags: qr rd ra; QUERY: 1, ANSWER: 16, AUTHORITY: 13, ADDITIONAL: 1
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;google.com. IN A
;; ANSWER SECTION:
google.com. 92 IN A 41.201.129.30
google.com. 92 IN A 41.201.129.54
google.com. 92 IN A 41.201.129.29
google.com. 92 IN A 41.201.129.25
google.com. 92 IN A 41.201.129.50
google.com. 92 IN A 41.201.129.59
google.com. 92 IN A 41.201.129.24
google.com. 92 IN A 41.201.129.40
google.com. 92 IN A 41.201.129.34
google.com. 92 IN A 41.201.129.44
google.com. 92 IN A 41.201.129.20
google.com. 92 IN A 41.201.129.45
google.com. 92 IN A 41.201.129.49
google.com. 92 IN A 41.201.129.39
google.com. 92 IN A 41.201.129.35
google.com. 92 IN A 41.201.129.55
;; AUTHORITY SECTION:
. 169937 IN NS c.root-servers.net.
. 169937 IN NS m.root-servers.net.
. 169937 IN NS e.root-servers.net.
. 169937 IN NS i.root-servers.net.
. 169937 IN NS j.root-servers.net.
. 169937 IN NS b.root-servers.net.
. 169937 IN NS g.root-servers.net.
. 169937 IN NS h.root-servers.net.
. 169937 IN NS k.root-servers.net.
. 169937 IN NS a.root-servers.net.
. 169937 IN NS l.root-servers.net.
. 169937 IN NS f.root-servers.net.
. 169937 IN NS d.root-servers.net.
;; Query time: 85 msec
;; SERVER: 192.168.0.100#53(192.168.0.100)
;; WHEN: Wed Dec 14 04:44:52 CET 2016
;; MSG SIZE rcvd: 506
Eu quero informar a todos que o problema está resolvido, meu laboratório estava na estação de trabalho Vmware 12, mas quando eu mudei para a Kvm, tudo funcionou bem, não vinculado e nomeado. Os dois funcionaram como esperado e eu não precisei desligar o dnssec- validação para nome.