watchNS/ns1.isc-sns.netについて、ここに記述してください。
$ dnsq a ns1.isc-sns.net a.gtld-servers.net
1 ns1.isc-sns.net: 166 bytes, 1+0+3+3 records, response, noerror query: 1 ns1.isc-sns.net authority: isc-sns.net 172800 NS ns1.isc-sns.net authority: isc-sns.net 172800 NS ns2.isc-sns.com authority: isc-sns.net 172800 NS ns3.isc-sns.info additional: ns1.isc-sns.net 172800 28 \040\001\004p\000\032\000\000\000\000\000\000\000\000\000\001 additional: ns1.isc-sns.net 172800 A 72.52.71.1 additional: ns2.isc-sns.com 172800 A 63.243.194.1
1. knot resolver
$ dig ns2.isc-sns.com @127.0.0.3 ; <<>> DiG 9.11.1 <<>> ns2.isc-sns.com @127.0.0.3 ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 51702 ;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 1 ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 4096 ; COOKIE: 7337b524ea82c2976c564e745912ce53507750ac6c86810d (good) ;; QUESTION SECTION: ;ns2.isc-sns.com. IN A ;; Query time: 0 msec ;; SERVER: 127.0.0.3#53(127.0.0.3) ;; WHEN: Wed May 10 17:24:51 JST 2017 ;; MSG SIZE rcvd: 72
2. log
@400000005912ce9c2d0ad87c [ 0][plan] plan 'ns2.isc-sns.com.' type 'A' @400000005912ce9c2d0b6134 [28115][iter] 'ns2.isc-sns.com.' type 'A' id was assigned, parent id 0 @400000005912ce9c2d0b845c [28115][resl] NT check; ns2isc-snscom cut isc-snscom @400000005912ce9c2d0b845c [28115][resl] kr peekpkt ns2isc-snscom ret -2 @400000005912ce9c2d0b9fb4 [11675][iter] 'ns2.isc-sns.com.' type 'A' id was assigned, parent id 0 @400000005912ce9c2d0b9fb4 [11675][plan] plan 'ns3.isc-sns.info.' type 'A' @400000005912ce9c2d0bedd4 [13930][iter] 'ns3.isc-sns.info.' type 'A' id was assigned, parent id 11675 @400000005912ce9c2d0bf1bc [13930][resl] NT check; ns3isc-snsinfo cut isc-snsinfo @400000005912ce9c2d0bf5a4 [13930][resl] kr peekpkt ns3isc-snsinfo ret -2 @400000005912ce9c2d0c092c [14116][iter] 'ns3.isc-sns.info.' type 'A' id was assigned, parent id 11675 @400000005912ce9c2d0c0d14 [14116][resl] => unresolvable NS address, bailing out @400000005912ce9c2d0c1cb4 [14116][plan] plan 'ns1.isc-sns.net.' type 'A' @400000005912ce9c2d0c209c [12502][iter] 'ns1.isc-sns.net.' type 'A' id was assigned, parent id 14116 @400000005912ce9c2d0c5f1c [12502][resl] NT check; ns1isc-snsnet cut isc-snsnet @400000005912ce9c2d0c768c [12502][resl] kr peekpkt ns1isc-snsnet ret -2 @400000005912ce9c2d0c768c [22996][iter] 'ns1.isc-sns.net.' type 'A' id was assigned, parent id 14116 @400000005912ce9c2d0c7a74 [22996][resl] => unresolvable NS address, bailing out @400000005912ce9c2d0c8dfc [22996][resl] => unresolvable NS address, bailing out @400000005912ce9c2d0c91e4 [22996][resl] => circular dependepcy, retrying with non-minimized name @400000005912ce9c2d0c95cc [ 2714][iter] 'ns1.isc-sns.net.' type 'A' id was assigned, parent id 14116 @400000005912ce9c2d0ce3ec [ 2714][resl] => unresolvable NS address, bailing out @400000005912ce9c2d0ce3ec [ 2714][resl] => no valid NS left @400000005912ce9c2d0ce7d4 [ 2268][iter] 'ns3.isc-sns.info.' type 'A' id was assigned, parent id 11675 @400000005912ce9c2d0d0afc [ 2268][resl] => unresolvable NS address, bailing out @400000005912ce9c2d0d0ee4 [ 2268][resl] => circular dependepcy, retrying with non-minimized name @400000005912ce9c2d0d0ee4 [38017][iter] 'ns3.isc-sns.info.' type 'A' id was assigned, parent id 11675 @400000005912ce9c2d0d41ac [38017][resl] => unresolvable NS address, bailing out @400000005912ce9c2d0d591c [38017][plan] plan 'ns1.isc-sns.net.' type 'A' @400000005912ce9c2d0d5d04 [13839][iter] 'ns1.isc-sns.net.' type 'A' id was assigned, parent id 38017 @400000005912ce9c2d0d87fc [13839][resl] NT check; ns1isc-snsnet cut isc-snsnet @400000005912ce9c2d0d9f6c [13839][resl] kr peekpkt ns1isc-snsnet ret -2 @400000005912ce9c2d0d9f6c [42948][iter] 'ns1.isc-sns.net.' type 'A' id was assigned, parent id 38017 @400000005912ce9c2d0da354 [42948][resl] => unresolvable NS address, bailing out @400000005912ce9c2d0db6dc [42948][resl] => unresolvable NS address, bailing out @400000005912ce9c2d0db6dc [42948][resl] => circular dependepcy, retrying with non-minimized name @400000005912ce9c2d0dbac4 [36850][iter] 'ns1.isc-sns.net.' type 'A' id was assigned, parent id 38017 @400000005912ce9c2d0de9a4 [36850][resl] => unresolvable NS address, bailing out @400000005912ce9c2d0de9a4 [36850][resl] => no valid NS left @400000005912ce9c2d0dfd2c [ 449][iter] 'ns3.isc-sns.info.' type 'A' id was assigned, parent id 11675 @400000005912ce9c2d0e10b4 [ 449][resl] => unresolvable NS address, bailing out @400000005912ce9c2d0e10b4 [ 449][resl] => unresolvable NS address, bailing out @400000005912ce9c2d0e149c [ 449][resl] => no valid NS left @400000005912ce9c2d0e243c [33789][iter] 'ns2.isc-sns.com.' type 'A' id was assigned, parent id 0 @400000005912ce9c2d0e33dc [33789][resl] => unresolvable NS address, bailing out @400000005912ce9c2d0e37c4 [33789][resl] => circular dependepcy, retrying with non-minimized name @400000005912ce9c2d0e4764 [25890][iter] 'ns2.isc-sns.com.' type 'A' id was assigned, parent id 0 @400000005912ce9c2d0e7e14 [25890][resl] => unresolvable NS address, bailing out @400000005912ce9c2d0e81fc [25890][plan] plan 'ns1.isc-sns.net.' type 'A' @400000005912ce9c2d0e996c [56752][iter] 'ns1.isc-sns.net.' type 'A' id was assigned, parent id 25890 @400000005912ce9c2d0ea90c [56752][resl] NT check; ns1isc-snsnet cut isc-snsnet @400000005912ce9c2d0ebc94 [56752][resl] kr peekpkt ns1isc-snsnet ret -2 @400000005912ce9c2d0ebc94 [56717][iter] 'ns1.isc-sns.net.' type 'A' id was assigned, parent id 25890 @400000005912ce9c2d0ee3a4 [56717][plan] plan 'ns3.isc-sns.info.' type 'A' @400000005912ce9c2d0ee78c [11884][iter] 'ns3.isc-sns.info.' type 'A' id was assigned, parent id 56717 @400000005912ce9c2d0ef72c [11884][resl] NT check; ns3isc-snsinfo cut isc-snsinfo @400000005912ce9c2d0f0ab4 [11884][resl] kr peekpkt ns3isc-snsinfo ret -2 @400000005912ce9c2d0f0ab4 [45110][iter] 'ns3.isc-sns.info.' type 'A' id was assigned, parent id 56717 @400000005912ce9c2d0f1e3c [45110][resl] => unresolvable NS address, bailing out @400000005912ce9c2d0f1e3c [45110][resl] => circular dependepcy, retrying with non-minimized name @400000005912ce9c2d0f31c4 [25547][iter] 'ns3.isc-sns.info.' type 'A' id was assigned, parent id 56717 @400000005912ce9c2d10c41c [25547][resl] => unresolvable NS address, bailing out @400000005912ce9c2d10c804 [25547][resl] => unresolvable NS address, bailing out @400000005912ce9c2d10cbec [25547][resl] => no valid NS left @400000005912ce9c2d10cbec [ 7154][iter] 'ns1.isc-sns.net.' type 'A' id was assigned, parent id 25890 @400000005912ce9c2d10cfd4 [ 7154][resl] => unresolvable NS address, bailing out @400000005912ce9c2d10d3bc [ 7154][resl] => unresolvable NS address, bailing out @400000005912ce9c2d10d3bc [ 7154][resl] => circular dependepcy, retrying with non-minimized name @400000005912ce9c2d110a6c [ 4922][iter] 'ns1.isc-sns.net.' type 'A' id was assigned, parent id 25890 @400000005912ce9c2d110e54 [ 4922][resl] => unresolvable NS address, bailing out @400000005912ce9c2d11123c [ 4922][resl] => no valid NS left @400000005912ce9c2d11123c [41337][iter] 'ns2.isc-sns.com.' type 'A' id was assigned, parent id 0 @400000005912ce9c2d111624 [41337][resl] => unresolvable NS address, bailing out @400000005912ce9c2d1125c4 [41337][resl] => no valid NS left @400000005912ce9c2d1125c4 [ 0][resl] finished: 8, queries: 6, mempool: 49200 B