watchNS/greensys.ne.jpについて、ここに記述してください。
JPサーバーが余計なAレコードをつけてくることが害であることを示す実例：
%dig -t ns greensys.ne.jp @a.dns.jp ~/dnsq/0103 ; <<>> DiG 9.11.2 <<>> -t ns greensys.ne.jp @a.dns.jp ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 9836 ;; flags: qr rd; QUERY: 1, ANSWER: 0, AUTHORITY: 5, ADDITIONAL: 30 ;; WARNING: recursion requested but not available ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 4096 ;; QUESTION SECTION: ;greensys.ne.jp. IN NS ;; AUTHORITY SECTION: greensys.ne.jp. 86400 IN NS ns1.xserver.jp. greensys.ne.jp. 86400 IN NS dns1.greensys.ne.jp. greensys.ne.jp. 86400 IN NS ns3.xserver.jp. greensys.ne.jp. 86400 IN NS dns2.greensys.ne.jp. greensys.ne.jp. 86400 IN NS ns2.xserver.jp. ;; ADDITIONAL SECTION: ns1.xserver.jp. 86400 IN A 219.94.200.165 ns1.xserver.jp. 86400 IN A 219.94.200.166 ns1.xserver.jp. 86400 IN A 219.94.200.167 ns1.xserver.jp. 86400 IN A 219.94.200.168 ns1.xserver.jp. 86400 IN A 219.94.200.169 ns1.xserver.jp. 86400 IN A 219.94.200.170 ns1.xserver.jp. 86400 IN A 219.94.200.246 ns1.xserver.jp. 86400 IN A 219.94.200.70 ns1.xserver.jp. 86400 IN A 219.94.200.71 ns1.xserver.jp. 86400 IN A 219.94.200.164 ns2.xserver.jp. 86400 IN A 157.112.182.225 ns2.xserver.jp. 86400 IN A 210.188.201.61 ns2.xserver.jp. 86400 IN A 210.188.201.246 ns2.xserver.jp. 86400 IN A 157.112.182.221 ns2.xserver.jp. 86400 IN A 157.112.182.222 ns2.xserver.jp. 86400 IN A 157.112.182.223 ns2.xserver.jp. 86400 IN A 157.112.182.224 ns3.xserver.jp. 86400 IN A 219.94.200.176 ns3.xserver.jp. 86400 IN A 219.94.200.177 ns3.xserver.jp. 86400 IN A 219.94.200.247 ns3.xserver.jp. 86400 IN A 219.94.200.72 ns3.xserver.jp. 86400 IN A 219.94.200.73 ns3.xserver.jp. 86400 IN A 219.94.200.171 ns3.xserver.jp. 86400 IN A 219.94.200.172 ns3.xserver.jp. 86400 IN A 219.94.200.173 ns3.xserver.jp. 86400 IN A 219.94.200.174 ns3.xserver.jp. 86400 IN A 219.94.200.175 dns1.greensys.ne.jp. 86400 IN A 182.171.248.210 dns2.greensys.ne.jp. 86400 IN A 202.212.80.146 ;; Query time: 6 msec ;; SERVER: 203.119.1.1#53(203.119.1.1) ;; WHEN: Wed Jan 10 07:35:59 JST 2018 ;; MSG SIZE rcvd: 607
こっちはもっとまずい。
%dig +noedns -t ns greensys.ne.jp @a.dns.jp ~/dnsq/0103 ; <<>> DiG 9.11.2 <<>> +noedns -t ns greensys.ne.jp @a.dns.jp ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 51917 ;; flags: qr rd; QUERY: 1, ANSWER: 0, AUTHORITY: 5, ADDITIONAL: 17 ;; WARNING: recursion requested but not available ;; QUESTION SECTION: ;greensys.ne.jp. IN NS ;; AUTHORITY SECTION: greensys.ne.jp. 86400 IN NS dns2.greensys.ne.jp. greensys.ne.jp. 86400 IN NS ns1.xserver.jp. greensys.ne.jp. 86400 IN NS dns1.greensys.ne.jp. greensys.ne.jp. 86400 IN NS ns3.xserver.jp. greensys.ne.jp. 86400 IN NS ns2.xserver.jp. ;; ADDITIONAL SECTION: ns1.xserver.jp. 86400 IN A 219.94.200.164 ns1.xserver.jp. 86400 IN A 219.94.200.165 ns1.xserver.jp. 86400 IN A 219.94.200.166 ns1.xserver.jp. 86400 IN A 219.94.200.167 ns1.xserver.jp. 86400 IN A 219.94.200.168 ns1.xserver.jp. 86400 IN A 219.94.200.169 ns1.xserver.jp. 86400 IN A 219.94.200.170 ns1.xserver.jp. 86400 IN A 219.94.200.246 ns1.xserver.jp. 86400 IN A 219.94.200.70 ns1.xserver.jp. 86400 IN A 219.94.200.71 ns2.xserver.jp. 86400 IN A 157.112.182.223 ns2.xserver.jp. 86400 IN A 157.112.182.224 ns2.xserver.jp. 86400 IN A 157.112.182.225 ns2.xserver.jp. 86400 IN A 210.188.201.61 ns2.xserver.jp. 86400 IN A 210.188.201.246 ns2.xserver.jp. 86400 IN A 157.112.182.221 ns2.xserver.jp. 86400 IN A 157.112.182.222 ;; Query time: 6 msec ;; SERVER: 203.119.1.1#53(203.119.1.1) ;; WHEN: Wed Jan 10 08:31:47 JST 2018 ;; MSG SIZE rcvd: 404