DNS/実装/unbound/query.logについて、ここに記述してください。

qmail minimisationとcase randomizationとを有効にしてある。

== dig f.ns.qmail.jpのログ ==
qmail.jp NS (tinydns)に送られてきたもの
{{{
@400000005669873d18ccceec 276e8703:d0ff:cdc3 + 0002 NS.qmAIL.JP
@400000005669873d198f1d1c 276e8703:60a4:9b62 + 0002 nS.QmAIL.jp
@400000005669873d1993dfdc 276e8703:defc:8c3f + 0001 F.nS.qMaIL.Jp
@400000005669873d1993e3c4 276e8703:70cd:7a98 + 0002 QMAiL.jP
@400000005669873d1a80c464 276e8703:5d9d:0110 + 0001 a.NS.QMAIL.jP
}}}

ns.qmail.jpはempty non-terminalなので、NS queryに対して、NXDOMAINを返している。
　ここは議論があるところなので、no data を返すようにしてみる。
-- ToshinoriMaeno <<DateTime(2015-12-10T23:21:24+0900)>>

== unbound.log ==
jpサーバはキャッシュにある状態から
{{{
[1449756467] unbound[1051:0] info: resolving f.ns.qmail.jp. A IN
[1449756467] unbound[1051:0] info: response for f.ns.qmail.jp. A IN
[1449756467] unbound[1051:0] info: reply from <jp.> 192.50.43.53#53
[1449756467] unbound[1051:0] info: query response was REFERRAL
[1449756467] unbound[1051:0] info: resolving qmail.jp. NS IN
[1449756467] unbound[1051:0] info: response for f.ns.qmail.jp. A IN
[1449756467] unbound[1051:0] info: reply from <qmail.jp.> 14.192.44.5#53
[1449756467] unbound[1051:0] info: query response was NXDOMAIN ANSWER
[1449756467] unbound[1051:0] info: response for qmail.jp. NS IN
[1449756467] unbound[1051:0] info: reply from <jp.> 150.100.6.8#53
[1449756467] unbound[1051:0] info: query response was REFERRAL
[1449756467] unbound[1051:0] info: resolving a.ns.qmail.jp. A IN
[1449756467] unbound[1051:0] info: response for f.ns.qmail.jp. A IN
[1449756467] unbound[1051:0] info: reply from <qmail.jp.> 14.192.44.5#53
[1449756467] unbound[1051:0] info: query response was ANSWER
[1449756467] unbound[1051:0] info: response for qmail.jp. NS IN
[1449756467] unbound[1051:0] info: reply from <qmail.jp.> 14.192.44.5#53
[1449756467] unbound[1051:0] info: query response was ANSWER
[1449756467] unbound[1051:0] info: response for a.ns.qmail.jp. A IN
[1449756467] unbound[1051:0] info: reply from <qmail.jp.> 14.192.44.5#53
[1449756467] unbound[1051:0] info: query response was NXDOMAIN ANSWER
[1449756467] unbound[1051:0] info: response for a.ns.qmail.jp. A IN
[1449756467] unbound[1051:0] info: reply from <qmail.jp.> 14.192.44.5#53
[1449756467] unbound[1051:0] info: query response was ANSWER
}}}

unbound側のlogがおかしいらしい。
　問い合わせの名前がきちんと記録されていない。(ns.qmail.jp NSなど）
-- ToshinoriMaeno <<DateTime(2015-12-10T23:17:59+0900)>>