ルートゾーンKSK/日本では/dns-oarc.net/bind-4096について、ここに記述してください。
テスト作成者はこんな返答を期待しているらしい。
$ dig +bufsize=4096 rs\.dns-oarc\.net txt @127.0.0.1
; <<>> DiG 9.11.1 <<>> +bufsize=4096 rs.dns-oarc.net txt @127.0.0.1 ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 4962 ;; flags: qr rd ra; QUERY: 1, ANSWER: 6, AUTHORITY: 0, ADDITIONAL: 1 ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 4096 ;; QUESTION SECTION: ;rs.dns-oarc.net. IN TXT ;; ANSWER SECTION: rs.dns-oarc.net. 60 IN CNAME rst.x487.rs.dns-oarc.net. rst.x487.rs.dns-oarc.net. 59 IN CNAME rst.x461.x487.rs.dns-oarc.net. rst.x461.x487.rs.dns-oarc.net. 58 IN CNAME rst.x466.x461.x487.rs.dns-oarc.net. rst.x466.x461.x487.rs.dns-oarc.net. 57 IN TXT "39.110.135.12 sent EDNS buffer size 512" rst.x466.x461.x487.rs.dns-oarc.net. 57 IN TXT "39.110.135.12 DNS reply size limit is at least 487" rst.x466.x461.x487.rs.dns-oarc.net. 57 IN TXT "Tested at 2017-07-25 14:29:09 UTC" ;; Query time: 4473 msec ;; SERVER: 127.0.0.1#53(127.0.0.1) ;; WHEN: Tue Jul 25 23:29:09 JST 2017 ;; MSG SIZE rcvd: 274
1. だが
こうなることも。
$ dig +bufsize=4096 rs.dns-oarc.net txt @127.0.0.1 ; <<>> DiG 9.11.1 <<>> +bufsize=4096 rs.dns-oarc.net txt @127.0.0.1 ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 53879 ;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 1 ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 4096 ;; QUESTION SECTION: ;rs.dns-oarc.net. IN TXT ;; Query time: 3188 msec ;; SERVER: 127.0.0.1#53(127.0.0.1) ;; WHEN: Tue Jul 25 23:32:31 JST 2017 ;; MSG SIZE rcvd: 44
$ dig +bufsize=4096 rs.dns-oarc.net txt @127.0.0.1
; <<>> DiG 9.11.1 <<>> +bufsize=4096 rs.dns-oarc.net txt @127.0.0.1 ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 59069 ;; flags: qr rd ra; QUERY: 1, ANSWER: 6, AUTHORITY: 0, ADDITIONAL: 1 ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 4096 ;; QUESTION SECTION: ;rs.dns-oarc.net. IN TXT ;; ANSWER SECTION: rs.dns-oarc.NET. 53 IN CNAME rst.x4048.rs.dns-oarc.net. rst.x4048.rs.dns-oarc.NET. 53 IN CNAME rst.x4058.x4048.rs.dns-oarc.net. rst.x4058.x4048.rs.dns-oarc.net. 58 IN CNAME rst.x4064.x4058.x4048.rs.dns-oarc.net. rst.x4064.x4058.x4048.rs.dns-oarc.net. 57 IN TXT "Tested at 2017-07-25 14:32:43 UTC" rst.x4064.x4058.x4048.rs.dns-oarc.net. 57 IN TXT "39.110.135.12 sent EDNS buffer size 4096" rst.x4064.x4058.x4048.rs.dns-oarc.net. 57 IN TXT "39.110.135.12 DNS reply size limit is at least 4064" ;; Query time: 1924 msec ;; SERVER: 127.0.0.1#53(127.0.0.1) ;; WHEN: Tue Jul 25 23:32:43 JST 2017 ;; MSG SIZE rcvd: 304
$ dig +bufsize=4096 rs.dns-oarc.net txt @127.0.0.1
; <<>> DiG 9.11.1 <<>> +bufsize=4096 rs.dns-oarc.net txt @127.0.0.1 ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 50720 ;; flags: qr rd ra; QUERY: 1, ANSWER: 6, AUTHORITY: 0, ADDITIONAL: 1 ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 4096 ;; QUESTION SECTION: ;rs.dns-oarc.net. IN TXT ;; ANSWER SECTION: rs.dns-oarc.net. 60 IN CNAME rst.x4048.rs.dns-oarc.net. rst.x4048.rs.dns-oarc.net. 59 IN CNAME rst.x1198.x4048.rs.dns-oarc.net. rst.x1198.x4048.rs.dns-oarc.net. 58 IN CNAME rst.x4064.x1198.x4048.rs.dns-oarc.net. rst.x4064.x1198.x4048.rs.dns-oarc.net. 57 IN TXT "39.110.135.12 DNS reply size limit is at least 4064" rst.x4064.x1198.x4048.rs.dns-oarc.net. 57 IN TXT "39.110.135.12 sent EDNS buffer size 4096" rst.x4064.x1198.x4048.rs.dns-oarc.net. 57 IN TXT "Tested at 2017-07-25 14:34:20 UTC" ;; Query time: 1663 msec ;; SERVER: 127.0.0.1#53(127.0.0.1) ;; WHEN: Tue Jul 25 23:34:20 JST 2017 ;; MSG SIZE rcvd: 279
2. 2048
$ dig +bufsize=2048 rs.dns-oarc.net txt @127.0.0.1 ; <<>> DiG 9.11.1 <<>> +bufsize=2048 rs.dns-oarc.net txt @127.0.0.1 ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 50463 ;; flags: qr rd ra; QUERY: 1, ANSWER: 6, AUTHORITY: 0, ADDITIONAL: 1 ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 4096 ;; QUESTION SECTION: ;rs.dns-oarc.net. IN TXT ;; ANSWER SECTION: rs.dns-oarc.net. 60 IN CNAME rst.x1398.rs.dns-oarc.net. rst.x1398.rs.dns-oarc.net. 59 IN CNAME rst.x1198.x1398.rs.dns-oarc.net. rst.x1198.x1398.rs.dns-oarc.net. 58 IN CNAME rst.x1734.x1198.x1398.rs.dns-oarc.net. rst.x1734.x1198.x1398.rs.dns-oarc.net. 57 IN TXT "Tested at 2017-07-25 14:35:49 UTC" rst.x1734.x1198.x1398.rs.dns-oarc.net. 57 IN TXT "39.110.135.12 sent EDNS buffer size 4096" rst.x1734.x1198.x1398.rs.dns-oarc.net. 57 IN TXT "39.110.135.12 DNS reply size limit is at least 1734" ;; Query time: 1670 msec ;; SERVER: 127.0.0.1#53(127.0.0.1) ;; WHEN: Tue Jul 25 23:35:49 JST 2017 ;; MSG SIZE rcvd: 279