DNS/キャッシュサーバ/unbound/TTLの扱い/a.t.e-ontap.com/-2について、ここに記述してください。

authority, additional section のDNSレコードのTTLの変化に注目。 -- ToshinoriMaeno 2011-08-12 10:00:02

unbound-1.4.12

%dnsqr a a.t.e-ontap.com
1 a.t.e-ontap.com:
82 bytes, 1+1+1+1 records, response, noerror
query: 1 a.t.e-ontap.com
answer: a.t.e-ontap.com 60 A 202.41.218.249
authority: t.e-ontap.com 600 NS ns.t.e-ontap.com
additional: ns.t.e-ontap.com 600 A 202.41.218.228

18:53d%dnsqr a a.t.e-ontap.com
1 a.t.e-ontap.com:
82 bytes, 1+1+1+1 records, response, noerror
query: 1 a.t.e-ontap.com
answer: a.t.e-ontap.com 56 A 202.41.218.249
authority: t.e-ontap.com 492 NS ns.t.e-ontap.com
additional: ns.t.e-ontap.com 396 A 202.41.218.228

18:53d%dnsqr a a.t.e-ontap.com
1 a.t.e-ontap.com:
82 bytes, 1+1+1+1 records, response, noerror
query: 1 a.t.e-ontap.com
answer: a.t.e-ontap.com 52 A 202.41.218.249
authority: t.e-ontap.com 488 NS ns.t.e-ontap.com
additional: ns.t.e-ontap.com 392 A 202.41.218.228

18:53d%dnsqr a a.t.e-ontap.com
1 a.t.e-ontap.com:
82 bytes, 1+1+1+1 records, response, noerror
query: 1 a.t.e-ontap.com
answer: a.t.e-ontap.com 48 A 202.41.218.249
authority: t.e-ontap.com 484 NS ns.t.e-ontap.com
additional: ns.t.e-ontap.com 388 A 202.41.218.228

18:53d%dnsqr a a.t.e-ontap.com
1 a.t.e-ontap.com:
82 bytes, 1+1+1+1 records, response, noerror
query: 1 a.t.e-ontap.com
answer: a.t.e-ontap.com 45 A 202.41.218.249
authority: t.e-ontap.com 481 NS ns.t.e-ontap.com
additional: ns.t.e-ontap.com 385 A 202.41.218.228

18:53d%dnsqr a a.t.e-ontap.com
1 a.t.e-ontap.com:
82 bytes, 1+1+1+1 records, response, noerror
query: 1 a.t.e-ontap.com
answer: a.t.e-ontap.com 38 A 202.41.218.249
authority: t.e-ontap.com 474 NS ns.t.e-ontap.com
additional: ns.t.e-ontap.com 378 A 202.41.218.228


18:53d%dnsqr a a.t.e-ontap.com
1 a.t.e-ontap.com:
82 bytes, 1+1+1+1 records, response, noerror
query: 1 a.t.e-ontap.com
answer: a.t.e-ontap.com 35 A 202.41.218.249
authority: t.e-ontap.com 471 NS ns.t.e-ontap.com
additional: ns.t.e-ontap.com 375 A 202.41.218.228