Ubuntu/16.04LTS/unbound/log/003.jp/jp-answerについて、ここに記述してください。
a.dns.jpの返すNSは受け入れるにしても、Additionalは受け入れるべきではない。 -- ToshinoriMaeno 2019-02-03 03:15:03
$ dig 003.jp @a.dns.jp ; <<>> DiG 9.12.3 <<>> 003.jp @a.dns.jp ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 36619 ;; flags: qr rd; QUERY: 1, ANSWER: 0, AUTHORITY: 5, ADDITIONAL: 14 ;; WARNING: recursion requested but not available ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 4096 ; COOKIE: 6b0100b85f1a7593c5bf1e3b5c565c35b47664054780c49d (good) ;; QUESTION SECTION: ;003.jp. IN A ;; AUTHORITY SECTION: 003.jp. 86400 IN NS ns3.xserver.jp. 003.jp. 86400 IN NS ns1.xserver.jp. 003.jp. 86400 IN NS ns2.xserver.jp. 003.jp. 86400 IN NS ns5.xserver.jp. 003.jp. 86400 IN NS ns4.xserver.jp. ;; ADDITIONAL SECTION: ns1.xserver.jp. 86400 IN A 219.94.200.164 ns1.xserver.jp. 86400 IN A 219.94.200.170 ns1.xserver.jp. 86400 IN A 219.94.200.246 ns2.xserver.jp. 86400 IN A 157.112.182.221 ns2.xserver.jp. 86400 IN A 157.112.182.225 ns2.xserver.jp. 86400 IN A 210.188.201.246 ns3.xserver.jp. 86400 IN A 219.94.200.247 ns4.xserver.jp. 86400 IN A 183.90.224.226 ns4.xserver.jp. 86400 IN A 183.90.224.230 ns4.xserver.jp. 86400 IN A 219.94.203.247 ns5.xserver.jp. 86400 IN A 157.112.182.220 ns5.xserver.jp. 86400 IN A 210.188.201.247 ns5.xserver.jp. 86400 IN A 157.112.182.218 ;; Query time: 4 msec ;; SERVER: 203.119.1.1#53(203.119.1.1) ;; WHEN: 日 2月 03 12:12:53 JST 2019 ;; MSG SIZE rcvd: 369