CentOS 6.3 Versão 9.8.2 do BIND
O servidor está agindo como o servidor DNS da minha rede local.
O que acontece é que eu posso resolver o jquery.com muito bem, mas acessar o code.jquery.com resulta em nada encontrado ao consultar do localhost.
dig jquery.com
; <<>> DiG 9.8.2rc1-RedHat-9.8.2-0.10.rc1.el6_3.5 <<>> jquery.com
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 38326
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 6, ADDITIONAL: 6
;; QUESTION SECTION:
;jquery.com. IN A
;; ANSWER SECTION:
jquery.com. 3600 IN A 70.32.120.34
;; AUTHORITY SECTION:
jquery.com. 168983 IN NS ns11.dnsmadeeasy.com.
jquery.com. 168983 IN NS ns14.dnsmadeeasy.com.
jquery.com. 168983 IN NS ns13.dnsmadeeasy.com.
jquery.com. 168983 IN NS ns15.dnsmadeeasy.com.
jquery.com. 168983 IN NS ns10.dnsmadeeasy.com.
jquery.com. 168983 IN NS ns12.dnsmadeeasy.com.
;; ADDITIONAL SECTION:
ns10.dnsmadeeasy.com. 84449 IN A 208.94.148.4
ns11.dnsmadeeasy.com. 84449 IN A 208.80.124.4
ns12.dnsmadeeasy.com. 84449 IN A 208.80.126.4
ns13.dnsmadeeasy.com. 84449 IN A 208.80.125.4
ns14.dnsmadeeasy.com. 84449 IN A 208.80.127.4
ns15.dnsmadeeasy.com. 84449 IN A 208.94.149.4
;; Query time: 75 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Tue Oct 30 11:09:55 2012
;; MSG SIZE rcvd: 266
Então:
dig code.jquery.com
; <<>> DiG 9.8.2rc1-RedHat-9.8.2-0.10.rc1.el6_3.5 <<>> code.jquery.com
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 12717
;; flags: qr rd ra; QUERY: 1, ANSWER: 3, AUTHORITY: 0, ADDITIONAL: 0
;; QUESTION SECTION:
;code.jquery.com. IN A
;; ANSWER SECTION:
code.jquery.com. 43118 IN CNAME wac.1257.edgecastcdn.net.
wac.1257.edgecastcdn.net. 3518 IN CNAME ne.wac.edgecastcdn.net.
ne.wac.edgecastcdn.net. 3518 IN A 93.184.220.20
;; Query time: 80 msec
;; SERVER: 8.8.8.8#53(8.8.8.8)
;; WHEN: Tue Oct 30 11:10:45 2012
;; MSG SIZE rcvd: 108
Então:
dig jquery.com @localhost
; <<>> DiG 9.8.2rc1-RedHat-9.8.2-0.10.rc1.el6_3.5 <<>> jquery.com @localhost
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 10420
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 6, ADDITIONAL: 6
;; QUESTION SECTION:
;jquery.com. IN A
;; ANSWER SECTION:
jquery.com. 3501 IN A 70.32.120.34
;; AUTHORITY SECTION:
jquery.com. 168884 IN NS ns12.dnsmadeeasy.com.
jquery.com. 168884 IN NS ns10.dnsmadeeasy.com.
jquery.com. 168884 IN NS ns14.dnsmadeeasy.com.
jquery.com. 168884 IN NS ns13.dnsmadeeasy.com.
jquery.com. 168884 IN NS ns15.dnsmadeeasy.com.
jquery.com. 168884 IN NS ns11.dnsmadeeasy.com.
;; ADDITIONAL SECTION:
ns10.dnsmadeeasy.com. 84350 IN A 208.94.148.4
ns11.dnsmadeeasy.com. 84350 IN A 208.80.124.4
ns12.dnsmadeeasy.com. 84350 IN A 208.80.126.4
ns13.dnsmadeeasy.com. 84350 IN A 208.80.125.4
ns14.dnsmadeeasy.com. 84350 IN A 208.80.127.4
ns15.dnsmadeeasy.com. 84350 IN A 208.94.149.4
;; Query time: 0 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Tue Oct 30 11:11:34 2012
;; MSG SIZE rcvd: 266
E este é o pouco que estou perplexo:
dig code.jquery.com @localhost
; <<>> DiG 9.8.2rc1-RedHat-9.8.2-0.10.rc1.el6_3.5 <<>> code.jquery.com @localhost
;; global options: +cmd
;; connection timed out; no servers could be reached
Sua ligação local, por algum motivo, não pode acessar o edgecastcdn.net. Enquanto o google pode alcançá-los. tente dig @localhost edgecastcdn.net e dig @ns1.edgecastcdn.net edgecastcdn.net - você provavelmente obterá as mesmas mensagens de tempo limite.
Pode ser o problema de configuração incorreta ou o efeito colateral de algum ataque DDOS no edgecastcdn.net ou algo assim.