DNS/実装/KnotDNSresolver/yamato.ac.jpについて、ここに記述してください。

yamato.ac.jp ns2.dns.ne.jp 210.224.172.13
yamato.ac.jp ns1.dns.ne.jp 210.188.224.9

$ dig -t a yamato.ac.jp @127.0.0.3

; <<>> DiG 9.9.5-3ubuntu0.5-Ubuntu <<>> -t a yamato.ac.jp @127.0.0.3
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 34434
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 1452
;; QUESTION SECTION:
;yamato.ac.jp.                  IN      A

;; ANSWER SECTION:
yamato.ac.jp.           2610    IN      A       49.212.180.17

;; Query time: 0 msec
;; SERVER: 127.0.0.3#53(127.0.0.3)
;; WHEN: Wed Oct 07 21:38:11 JST 2015
;; MSG SIZE  rcvd: 57

Knot Resolver がJPからのAレコードをどう扱うか。

ただ、「委譲・委任」毒を受け入れても、

現状では実害は大きくないと言える。 --> やはり委譲がキャッシュされることのないドメイン名を狙う方が効果的だろう。  -- ToshinoriMaeno 2015-10-07 15:18:59

[plan] plan 'yamato.ac.jp.' type 'A'
[resl]   => querying: '2001:502:ad09::5' score: 10 zone cut: 'jp.' m12n: 'ac.JP.' type: 'NS'
[resl]      optional: '156.154.100.5' score: 10 zone cut: 'jp.' m12n: 'ac.JP.' type: 'NS'
[resl]   => NS unreachable, retrying over TCP
[resl]   => querying: '2001:502:ad09::5' score: 10 zone cut: 'jp.' m12n: 'aC.jP.' type: 'NS'
[resl]      optional: '156.154.100.5' score: 10 zone cut: 'jp.' m12n: 'aC.jP.' type: 'NS'
[resl]   => querying: '2001:2f8:0:100::153' score: 10 zone cut: 'jp.' m12n: 'AC.jP.' type: 'NS'
[resl]      optional: '150.100.6.8' score: 10 zone cut: 'jp.' m12n: 'AC.jP.' type: 'NS'
[plan] plan 'yamato.ac.jp.' type 'A'
[resl]   => querying: '156.154.100.5' score: 10 zone cut: 'jp.' m12n: 'Ac.jP.' type: 'NS'
[iter]   <= rcode: NOERROR
[iter]   <= found cut, retrying with non-minimized name
[resl]   => querying: '2001:240::53' score: 10 zone cut: 'jp.' m12n: 'yamatO.aC.jp.' type: 'A'
[resl]      optional: '210.138.175.244' score: 10 zone cut: 'jp.' m12n: 'yamatO.aC.jp.' type: 'A'
[resl]   => NS unreachable, retrying over TCP
[resl]   => querying: '2001:2f8:0:100::153' score: 10 zone cut: 'jp.' m12n: 'Ac.jp.' type: 'NS'
[resl]      optional: '150.100.6.8' score: 10 zone cut: 'jp.' m12n: 'Ac.jp.' type: 'NS'
[resl]   => querying: '2001:240::53' score: 10 zone cut: 'jp.' m12n: 'Ac.Jp.' type: 'NS'
[resl]      optional: '210.138.175.244' score: 10 zone cut: 'jp.' m12n: 'Ac.Jp.' type: 'NS'
[resl]   => NS unreachable, retrying over TCP
[resl]   => querying: '2001:240::53' score: 10 zone cut: 'jp.' m12n: 'YaMatO.aC.jp.' type: 'A'
[resl]      optional: '210.138.175.244' score: 10 zone cut: 'jp.' m12n: 'YaMatO.aC.jp.' type: 'A'
[resl]   => querying: '210.138.175.244' score: 10 zone cut: 'jp.' m12n: 'YAmatO.Ac.jP.' type: 'A'
[iter]   <= referral response, follow
[resl]   => querying: '210.188.224.9' score: 10 zone cut: 'yamato.ac.jp.' m12n: 'YaMatO.ac.JP.' type: 'A'
[iter]   <= rcode: NOERROR
[resl] finished: 4, queries: 1, mempool: 32784 B

[resl]   => NS unreachable, retrying over TCP
[resl]   => querying: '2001:240::53' score: 10 zone cut: 'jp.' m12n: 'ac.Jp.' type: 'NS'
[resl]      optional: '210.138.175.244' score: 10 zone cut: 'jp.' m12n: 'ac.Jp.' type: 'NS'
[resl]   => querying: '150.100.6.8' score: 10 zone cut: 'jp.' m12n: 'ac.JP.' type: 'NS'
[iter]   <= rcode: NOERROR
[iter]   <= found cut, retrying with non-minimized name
[resl]   => querying: '2001:200:c000::35' score: 10 zone cut: 'jp.' m12n: 'YAMAto.aC.jP.' type: 'A'
[resl]      optional: '192.50.43.53' score: 10 zone cut: 'jp.' m12n: 'YAMAto.aC.jP.' type: 'A'
[resl]   => NS unreachable, retrying over TCP
[resl]   => querying: '2001:200:c000::35' score: 10 zone cut: 'jp.' m12n: 'yAMATo.Ac.jp.' type: 'A'
[resl]      optional: '192.50.43.53' score: 10 zone cut: 'jp.' m12n: 'yAMATo.Ac.jp.' type: 'A'
[resl]   => querying: '203.119.40.1' score: 10 zone cut: 'jp.' m12n: 'YAmATO.ac.Jp.' type: 'A'
[iter]   <= referral response, follow
[resl]   => querying: '210.224.172.13' score: 10 zone cut: 'yamato.ac.jp.' m12n: 'yAmaTO.ac.JP.' type: 'A'
[iter]   <= rcode: NOERROR
[resl] finished: 4, queries: 1, mempool: 16392 B

$ dig -t ns yamato.ac.jp @127.0.0.3

; <<>> DiG 9.9.5-3ubuntu0.5-Ubuntu <<>> -t ns yamato.ac.jp @127.0.0.3
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 27490
;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 1452
;; QUESTION SECTION:
;yamato.ac.jp.                  IN      NS

;; ANSWER SECTION:
yamato.ac.jp.           85553   IN      NS      ns1.dns.ne.jp.
yamato.ac.jp.           85553   IN      NS      ns2.dns.ne.jp.

;; Query time: 0 msec
;; SERVER: 127.0.0.3#53(127.0.0.3)
;; WHEN: Wed Oct 07 21:35:48 JST 2015
;; MSG SIZE  rcvd: 84

[plan] plan 'yamato.ac.jp.' type 'A'
[resl]   => querying: '2001:502:ad09::5' score: 10 zone cut: 'jp.' m12n: 'ac.JP.' type: 'NS'
[resl]      optional: '156.154.100.5' score: 10 zone cut: 'jp.' m12n: 'ac.JP.' type: 'NS'
[resl]   => NS unreachable, retrying over TCP
[resl]   => querying: '2001:502:ad09::5' score: 10 zone cut: 'jp.' m12n: 'aC.jP.' type: 'NS'
[resl]      optional: '156.154.100.5' score: 10 zone cut: 'jp.' m12n: 'aC.jP.' type: 'NS'
[resl]   => querying: '2001:2f8:0:100::153' score: 10 zone cut: 'jp.' m12n: 'AC.jP.' type: 'NS'
[resl]      optional: '150.100.6.8' score: 10 zone cut: 'jp.' m12n: 'AC.jP.' type: 'NS'
[plan] plan 'yamato.ac.jp.' type 'A'
[resl]   => querying: '156.154.100.5' score: 10 zone cut: 'jp.' m12n: 'Ac.jP.' type: 'NS'
[iter]   <= rcode: NOERROR
[iter]   <= found cut, retrying with non-minimized name
[resl]   => querying: '2001:240::53' score: 10 zone cut: 'jp.' m12n: 'yamatO.aC.jp.' type: 'A'
[resl]      optional: '210.138.175.244' score: 10 zone cut: 'jp.' m12n: 'yamatO.aC.jp.' type: 'A'
[resl]   => NS unreachable, retrying over TCP
[resl]   => querying: '2001:2f8:0:100::153' score: 10 zone cut: 'jp.' m12n: 'Ac.jp.' type: 'NS'
[resl]      optional: '150.100.6.8' score: 10 zone cut: 'jp.' m12n: 'Ac.jp.' type: 'NS'
[resl]   => querying: '2001:240::53' score: 10 zone cut: 'jp.' m12n: 'Ac.Jp.' type: 'NS'
[resl]      optional: '210.138.175.244' score: 10 zone cut: 'jp.' m12n: 'Ac.Jp.' type: 'NS'
[resl]   => NS unreachable, retrying over TCP
[resl]   => querying: '2001:240::53' score: 10 zone cut: 'jp.' m12n: 'YaMatO.aC.jp.' type: 'A'
[resl]      optional: '210.138.175.244' score: 10 zone cut: 'jp.' m12n: 'YaMatO.aC.jp.' type: 'A'
[resl]   => querying: '210.138.175.244' score: 10 zone cut: 'jp.' m12n: 'YAmatO.Ac.jP.' type: 'A'
[iter]   <= referral response, follow
[resl]   => querying: '210.188.224.9' score: 10 zone cut: 'yamato.ac.jp.' m12n: 'YaMatO.ac.JP.' type: 'A'
[iter]   <= rcode: NOERROR
[resl] finished: 4, queries: 1, mempool: 32784 B
[resl]   => NS unreachable, retrying over TCP
[resl]   => querying: '2001:240::53' score: 10 zone cut: 'jp.' m12n: 'ac.Jp.' type: 'NS'
[resl]      optional: '210.138.175.244' score: 10 zone cut: 'jp.' m12n: 'ac.Jp.' type: 'NS'
[resl]   => querying: '150.100.6.8' score: 10 zone cut: 'jp.' m12n: 'ac.JP.' type: 'NS'
[iter]   <= rcode: NOERROR
[iter]   <= found cut, retrying with non-minimized name
[resl]   => querying: '2001:200:c000::35' score: 10 zone cut: 'jp.' m12n: 'YAMAto.aC.jP.' type: 'A'
[resl]      optional: '192.50.43.53' score: 10 zone cut: 'jp.' m12n: 'YAMAto.aC.jP.' type: 'A'
[resl]   => NS unreachable, retrying over TCP
[resl]   => querying: '2001:200:c000::35' score: 10 zone cut: 'jp.' m12n: 'yAMATo.Ac.jp.' type: 'A'
[resl]      optional: '192.50.43.53' score: 10 zone cut: 'jp.' m12n: 'yAMATo.Ac.jp.' type: 'A'
[resl]   => querying: '203.119.40.1' score: 10 zone cut: 'jp.' m12n: 'YAmATO.ac.Jp.' type: 'A'
[iter]   <= referral response, follow
[resl]   => querying: '210.224.172.13' score: 10 zone cut: 'yamato.ac.jp.' m12n: 'yAmaTO.ac.JP.' type: 'A'
[iter]   <= rcode: NOERROR
[resl] finished: 4, queries: 1, mempool: 16392 B
[plan] plan 'yamato.ac.jp.' type 'NS'
[ rc ]   => satisfied from cache
[iter]   <= rcode: NOERROR
[resl] finished: 4, queries: 1, mempool: 16392 B