1. kresd/issues/100.jp

/tcpdump もしてみた。　/04-16

> [plan] plan '100.jp.' type 'A'

[resl]   => using root hints
[resl]   => querying: '202.12.27.33' score: 10 zone cut: '.' m12n: 'jp.' type: 'NS'
[resl]      optional: '199.7.83.42' score: 10 zone cut: '.' m12n: 'jp.' type: 'NS'
[resl]      optional: '193.0.14.129' score: 10 zone cut: '.' m12n: 'jp.' type: 'NS'
[resl]      optional: '192.58.128.30' score: 10 zone cut: '.' m12n: 'jp.' type: 'NS'
[iter]   <= referral response, follow
[resl]   <= server: '202.12.27.33' rtt: 6 ms

[resl]   => querying: '203.119.40.1' score: 10 zone cut: 'jp.' m12n: '100.Jp.' type: 'A'
[resl]      optional: '150.100.6.8' score: 10 zone cut: 'jp.' m12n: '100.Jp.' type: 'A'
[resl]      optional: '192.50.43.53' score: 10 zone cut: 'jp.' m12n: '100.Jp.' type: 'A'
[resl]      optional: '210.138.175.244' score: 10 zone cut: 'jp.' m12n: '100.Jp.' type: 'A'
[iter]   <= referral response, follow
[resl]   <= server: '203.119.40.1' rtt: 5 ms

[resl]   => querying: '210.188.224.9' score: 10 zone cut: '100.jp.' m12n: '100.jP.' type: 'A'
[iter]   <= rcode: NOERROR
[resl]   <= server: '210.188.224.9' rtt: 5 ms
[resl] finished: 4, queries: 1, mempool: 32800 B

JPからの100.jp NSは ns1.dns.ne.jp を指しているはずだが、それを問い合わせることなく、

• 100.jpを問い合わせている。ダメだ。(glueに準じた扱いか）

-- ToshinoriMaeno 2016-04-15 13:57:43

ただし、ns1.dns.ne.jp A レコードとしては保存されていないので、

• dig ns1.dns.ne.jp は問い合わせをしなおしている。

-- ToshinoriMaeno 2016-04-15 14:15:19

それでもout-of-bailiwick判定が不十分なことは確かです。

• もうちょっと調べてみよう。

> cachectl.clear()
true

> [plan] plan '100.jp.' type 'A'
[resl]   => using root hints
[resl]   => querying: '202.12.27.33' score: 10 zone cut: '.' m12n: 'jP.' type: 'NS'
[resl]      optional: '199.7.83.42' score: 10 zone cut: '.' m12n: 'jP.' type: 'NS'
[resl]      optional: '193.0.14.129' score: 10 zone cut: '.' m12n: 'jP.' type: 'NS'
[resl]      optional: '192.58.128.30' score: 10 zone cut: '.' m12n: 'jP.' type: 'NS'
[iter]   <= referral response, follow
[resl]   <= server: '202.12.27.33' rtt: 6 ms
[resl]   => querying: '203.119.40.1' score: 10 zone cut: 'jp.' m12n: '100.jP.' type: 'A'
[resl]      optional: '150.100.6.8' score: 10 zone cut: 'jp.' m12n: '100.jP.' type: 'A'
[resl]      optional: '192.50.43.53' score: 10 zone cut: 'jp.' m12n: '100.jP.' type: 'A'
[resl]      optional: '210.138.175.244' score: 10 zone cut: 'jp.' m12n: '100.jP.' type: 'A'
[iter]   <= referral response, follow
[resl]   <= server: '203.119.40.1' rtt: 7 ms
[resl]   => querying: '210.224.172.13' score: 10 zone cut: '100.jp.' m12n: '100.Jp.' type: 'A'
[iter]   <= rcode: NOERROR
[resl]   <= server: '210.224.172.13' rtt: 16 ms
[resl] finished: 4, queries: 1, mempool: 32800 B

直後に ns1.dns.ne.jp Aを問い合わせている。

[plan] plan 'ns1.dns.ne.jp.' type 'A'
[resl]   => querying: '150.100.6.8' score: 10 zone cut: 'jp.' m12n: 'NE.jP.' type: 'NS'
[resl]      optional: '192.50.43.53' score: 10 zone cut: 'jp.' m12n: 'NE.jP.' type: 'NS'
[resl]      optional: '210.138.175.244' score: 10 zone cut: 'jp.' m12n: 'NE.jP.' type: 'NS'
[resl]      optional: '156.154.100.5' score: 10 zone cut: 'jp.' m12n: 'NE.jP.' type: 'NS'
[iter]   <= rcode: NOERROR
[iter]   <= found cut, retrying with non-minimized name
[ pc ]   => answer cached for TTL=900
[resl]   <= server: '150.100.6.8' rtt: 7 ms
[resl]   => querying: '192.50.43.53' score: 10 zone cut: 'jp.' m12n: 'nS1.DNS.nE.jp.' type: 'A'
[resl]      optional: '210.138.175.244' score: 10 zone cut: 'jp.' m12n: 'nS1.DNS.nE.jp.' type: 'A'
[resl]      optional: '156.154.100.5' score: 10 zone cut: 'jp.' m12n: 'nS1.DNS.nE.jp.' type: 'A'
[resl]      optional: '202.12.30.131' score: 10 zone cut: 'jp.' m12n: 'nS1.DNS.nE.jp.' type: 'A'
[iter]   <= referral response, follow
[resl]   <= server: '192.50.43.53' rtt: 20 ms
[resl]   => querying: '210.224.172.13' score: 16 zone cut: 'dns.ne.jp.' m12n: 'nS1.DNS.ne.jP.' type: 'A'
[resl]      optional: '210.188.224.9' score: 16 zone cut: 'dns.ne.jp.' m12n: 'nS1.DNS.ne.jP.' type: 'A'
[iter]   <= rcode: NOERROR
[resl]   <= server: '210.224.172.13' rtt: 13 ms
[resl] finished: 4, queries: 1, mempool: 32800 B