watchNS/gov.auについて、ここに記述してください。
ccTLD/au 参照
- au のNSは[abrsuvxyz].au という名前をもつ。
うちwxyzはgovなどのサブドメインのNSでもある。
$ dnsq ns gov.au x.au
2 gov.au: 88 bytes, 1+4+0+0 records, response, authoritative, noerror query: 2 gov.au answer: gov.au 86400 NS z.au answer: gov.au 86400 NS x.au answer: gov.au 86400 NS y.au answer: gov.au 86400 NS w.au
$ dnsq a nonexist.gov.au x.au
1 nonexist.gov.au: 95 bytes, 1+0+1+0 records, response, authoritative, nxdomain query: 1 nonexist.gov.au authority: gov.au 900 SOA w.au support.ausregistry.com.au 1459489895 1800 300 1814400 1800
$ dnsq a nonexistent.nsw.gov.au x.au
1 nonexistent.nsw.gov.au: 102 bytes, 1+0+1+0 records, response, authoritative, nxdomain query: 1 nonexistent.nsw.gov.au authority: nsw.gov.au 900 SOA w.au support.ausregistry.com.au 1459818720 1800 300 1814400 1800
この返答だけだと、gov.auゾーンが存在するかどうかは分からない。
- つまり、毒入り gov.au NS 返答が来たら、どうするか迷うはずだ。
ただし、こっちに聞いたひとは分かるはずだが、... 気持ち悪い設定である。
$ dnsq a nonexistent.nsw.gov.au a.au 1 nonexistent.nsw.gov.au: 280 bytes, 1+0+4+8 records, response, noerror query: 1 nonexistent.nsw.gov.au authority: gov.au 86400 NS w.au authority: gov.au 86400 NS x.au authority: gov.au 86400 NS z.au authority: gov.au 86400 NS y.au additional: w.au 86400 A 37.209.192.5 additional: w.au 86400 28 \040\001\015\315\000\001\000\000\000\000\000\000\000\000\000\005 additional: x.au 86400 A 37.209.194.5 additional: x.au 86400 28 \040\001\015\315\000\002\000\000\000\000\000\000\000\000\000\005 additional: y.au 86400 A 37.209.196.5 additional: y.au 86400 28 \040\001\015\315\000\003\000\000\000\000\000\000\000\000\000\005 additional: z.au 86400 A 37.209.198.5 additional: z.au 86400 28 \040\001\015\315\000\004\000\000\000\000\000\000\000\000\000\005