## page was renamed from DNS/IPv6対応/mhlw
Describe DNS/IPv6対応/mhlw here.

== 厚生労働省の設定 ==
%dnsq ns mhlw.go.jp a.dns.jp
{{{
2 mhlw.go.jp:
230 bytes, 1+0+5+4 records, response, noerror
query: 2 mhlw.go.jp
authority: mhlw.go.jp 86400 NS nsipv601.mhlw.go.jp
authority: mhlw.go.jp 86400 NS ns01.mhlw.go.jp
authority: mhlw.go.jp 86400 NS nsipv602.mhlw.go.jp
authority: mhlw.go.jp 86400 NS ns02.mhlw.go.jp
authority: mhlw.go.jp 86400 NS ns-kg022.ocn.ad.jp
additional: ns01.mhlw.go.jp 86400 A 210.227.79.197
additional: ns02.mhlw.go.jp 86400 A 210.227.79.229
additional: nsipv601.mhlw.go.jp 86400 28 \040\001\003\200\005\025\000\001\000\000\000\000\000\000\001\001
additional: nsipv602.mhlw.go.jp 86400 28 \040\001\003\200\005\025\000\001\000\000\000\000\000\000\001\021
}}}

%dnsq ns mhlw.go.jp 210.227.79.197
{{{
2 mhlw.go.jp:
128 bytes, 1+3+0+2 records, response, authoritative, noerror
query: 2 mhlw.go.jp
answer: mhlw.go.jp 3600 NS ns-kg022.ocn.ad.jp
answer: mhlw.go.jp 3600 NS ns01.mhlw.go.jp
answer: mhlw.go.jp 3600 NS ns02.mhlw.go.jp
additional: ns01.mhlw.go.jp 3600 A 210.227.79.197
additional: ns02.mhlw.go.jp 3600 A 210.227.79.229
}}}

%dnsq any nsipv601.mhlw.go.jp 210.227.79.197
{{{
255 nsipv601.mhlw.go.jp:
165 bytes, 1+1+3+2 records, response, authoritative, noerror
query: 255 nsipv601.mhlw.go.jp
answer: nsipv601.mhlw.go.jp 3600 28 \040\001\003\200\005\025\000\001\000\000\000\000\000\000\001\001
authority: mhlw.go.jp 3600 NS ns02.mhlw.go.jp
authority: mhlw.go.jp 3600 NS ns-kg022.ocn.ad.jp
authority: mhlw.go.jp 3600 NS ns01.mhlw.go.jp
additional: ns01.mhlw.go.jp 3600 A 210.227.79.197
additional: ns02.mhlw.go.jp 3600 A 210.227.79.229
}}}

----

IPv6 アドレスをもつ NS レコードはどこへ行ったか。

IPv6で問い合わせてみると、返事には IPv4 関係のNS/A レコードがない。

%DNSCACHEIP=202.41.218.249 dnsqr ns mhlw.go.jp                                    ~
{{{
2 mhlw.go.jp:
130 bytes, 1+2+0+2 records, response, noerror
query: 2 mhlw.go.jp
answer: mhlw.go.jp 76619 NS nsipv601.mhlw.go.jp
answer: mhlw.go.jp 76619 NS nsipv602.mhlw.go.jp
additional: nsipv601.mhlw.go.jp 76619 28 \040\001\003\200\005\025\000\001\000\000\000\000\000\000\001\001
additional: nsipv602.mhlw.go.jp 76619 28 \040\001\003\200\005\025\000\001\000\000\000\000\000\000\001\021
}}}

[[DNS/jprs.jp]]はIPv4, IPv6どちらを使っても同じ返事が返る。