Não resolve alguns sites.

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Tenho um dns bind 9.2.3, no fedora 1.0.
Ele está funcionando perfeitamente para quase todos os dominios que pesquiso. Porém o que me deixa intrigado que de um tempo para cá ele não consegue resolver o www.nasa.gov. Que eu me lembre agora é o único que não consigo resolver.

Olhe o dig abaixo
# dig @localhost www.nasa.gov

<<>> DiG 9.2.3 <<>> @localhost www.nasa.gov
;; global options: printcmd
;; connection timed out; no servers could be reached

para todos os outros que tentei funciona normaimente.
dig @loclahost www.ig.com.br

; <<>> DiG 9.2.3 <<>> @localhost www.ig.com.br
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 18693
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 2, ADDITIONAL: 0

;; QUESTION SECTION:
;www.ig.com.br. IN A

;; ANSWER SECTION:
www.ig.com.br. 1424 IN A 200.226.133.74

;; AUTHORITY SECTION:
ig.com.br. 1424 IN NS ns2.ig.com.br.
ig.com.br. 1424 IN NS ns1.ig.com.br.

;; Query time: 5 msec
;; SERVER: 127.0.0.1#53(localhost)
;; WHEN: Mon Mar 22 19:05:22 2004
;; MSG SIZE rcvd: 83

Observe abaixo que só o secundario resolve mas o meu dns nao guarda no cache.

[root@kiol /]# dig www.nasa.gov

; <<>> DiG 9.2.3 <<>> www.nasa.gov
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 27768
;; flags: qr rd ra; QUERY: 1, ANSWER: 3, AUTHORITY: 13, ADDITIONAL: 12

;; QUESTION SECTION:
;www.nasa.gov. IN A

;; ANSWER SECTION:
www.nasa.gov. 588 IN CNAME www.nasa.gov.speedera.net.
www.nasa.gov.speedera.net. 120 IN A 64.14.117.26
www.nasa.gov.speedera.net. 120 IN A 63.218.11.132

;; AUTHORITY SECTION:
speedera.net. 86400 IN NS j.speedera.net.
speedera.net. 86400 IN NS l.speedera.net.
speedera.net. 86400 IN NS m.speedera.net.
speedera.net. 86400 IN NS n.speedera.net.
speedera.net. 86400 IN NS o.speedera.net.
speedera.net. 86400 IN NS p.speedera.net.
speedera.net. 86400 IN NS q.speedera.net.
speedera.net. 86400 IN NS s.speedera.net.
speedera.net. 86400 IN NS y.speedera.net.
speedera.net. 86400 IN NS a.speedera.net.
speedera.net. 86400 IN NS e.speedera.net.
speedera.net. 86400 IN NS f.speedera.net.
speedera.net. 86400 IN NS h.speedera.net.

;; ADDITIONAL SECTION:
a.speedera.net. 86400 IN A 208.185.54.61
e.speedera.net. 86400 IN A 221.111.1.3
f.speedera.net. 86400 IN A 210.224.186.3
h.speedera.net. 86400 IN A 64.14.117.35
j.speedera.net. 86400 IN A 202.160.241.132
l.speedera.net. 86400 IN A 64.0.96.22
m.speedera.net. 86400 IN A 212.162.1.222
n.speedera.net. 86400 IN A 65.169.170.140
o.speedera.net. 86400 IN A 63.166.13.72
p.speedera.net. 86400 IN A 208.185.219.162
q.speedera.net. 86400 IN A 64.41.192.113
s.speedera.net. 86400 IN A 205.158.108.220

;; Query time: 5276 msec
;; SERVER: 200.222.0.35#53(200.222.0.35)
;; WHEN: Mon Mar 22 19:07:59 2004
;; MSG SIZE rcvd: 501