watchNS/nstld.comについて、ここに記述してください。
$ dnsq ns nstld.com a.gtld-servers.net 2 nstld.com: 275 bytes, 1+0+4+8 records, response, noerror query: 2 nstld.com authority: nstld.com 172800 NS av1.nstld.com authority: nstld.com 172800 NS av2.nstld.com authority: nstld.com 172800 NS av3.nstld.com authority: nstld.com 172800 NS av4.nstld.com additional: av1.nstld.com 172800 A 192.42.177.30 additional: av1.nstld.com 172800 28 \040\001\005\000\001$\000\000\000\000\000\000\000\000\0000 additional: av2.nstld.com 172800 A 192.42.178.30 additional: av2.nstld.com 172800 28 \040\001\005\000\001%\000\000\000\000\000\000\000\000\0000 additional: av3.nstld.com 172800 A 192.82.133.30 additional: av3.nstld.com 172800 28 \040\001\005\000\001&\000\000\000\000\000\000\000\000\0000 additional: av4.nstld.com 172800 A 192.82.134.30 additional: av4.nstld.com 172800 28 \040\001\005\000\001'\000\000\000\000\000\000\000\000\0000
$ dnsq a av1.nstld.com av1.nstld.com 1 av1.nstld.com: 275 bytes, 1+1+4+7 records, response, authoritative, noerror query: 1 av1.nstld.com answer: av1.nstld.com 300 A 192.42.177.30 authority: nstld.com 86400 NS av4.nstld.com authority: nstld.com 86400 NS av2.nstld.com authority: nstld.com 86400 NS av3.nstld.com authority: nstld.com 86400 NS av1.nstld.com additional: av4.nstld.com 300 A 192.82.134.30 additional: av4.nstld.com 300 28 \040\001\005\000\001'\000\000\000\000\000\000\000\000\0000 additional: av2.nstld.com 300 A 192.42.178.30 additional: av2.nstld.com 300 28 \040\001\005\000\001%\000\000\000\000\000\000\000\000\0000 additional: av3.nstld.com 300 A 192.82.133.30 additional: av3.nstld.com 300 28 \040\001\005\000\001&\000\000\000\000\000\000\000\000\0000 additional: av1.nstld.com 300 28 \040\001\005\000\001$\000\000\000\000\000\000\000\000\0000
1. だが
$ dnsq ns gtld-servers.net av1.nstld.com 2 gtld-servers.net: 115 bytes, 1+4+0+0 records, response, authoritative, noerror query: 2 gtld-servers.net answer: gtld-servers.net 86400 NS av4.nstld.com answer: gtld-servers.net 86400 NS av2.nstld.com answer: gtld-servers.net 86400 NS av1.nstld.com answer: gtld-servers.net 86400 NS av3.nstld.com
ここにはadditionalがない。なぜだろう。-- ToshinoriMaeno 2018-10-28 15:08:39
- 必要ないから、なくてもおかしくはない。
$ dnsq ns nstld.com av1.nstld.com 2 nstld.com: 275 bytes, 1+4+0+8 records, response, authoritative, noerror query: 2 nstld.com answer: nstld.com 86400 NS av4.nstld.com answer: nstld.com 86400 NS av2.nstld.com answer: nstld.com 86400 NS av3.nstld.com answer: nstld.com 86400 NS av1.nstld.com additional: av4.nstld.com 300 A 192.82.134.30 additional: av4.nstld.com 300 28 \040\001\005\000\001'\000\000\000\000\000\000\000\000\0000 additional: av2.nstld.com 300 A 192.42.178.30 additional: av2.nstld.com 300 28 \040\001\005\000\001%\000\000\000\000\000\000\000\000\0000 ...
ここのadditionalだって必要ないのだが。-- ToshinoriMaeno 2018-10-28 15:18:22