Describe DNS/IPv6対応/mhlw here.
1. 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。