DNS/TCP/cwidc.netについて、ここに記述してください。

{{{
$ dig +tcp -t ns trendmicro.ne.jp @a.dns.jp

; <<>> DiG 9.12.1 <<>> +tcp -t ns trendmicro.ne.jp @a.dns.jp
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 14707
;; flags: qr rd; QUERY: 1, ANSWER: 0, AUTHORITY: 3, ADDITIONAL: 1
;; WARNING: recursion requested but not available

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;trendmicro.ne.jp.		IN	NS

;; AUTHORITY SECTION:
trendmicro.ne.jp.	86400	IN	NS	ns03.cwidc.net.
trendmicro.ne.jp.	86400	IN	NS	ns02.cwidc.net.
trendmicro.ne.jp.	86400	IN	NS	ns01.cwidc.net.

;; Query time: 5 msec
;; SERVER: 203.119.1.1#53(203.119.1.1)
;; WHEN: Mon Apr 23 13:15:15 JST 2018
;; MSG SIZE  rcvd: 111

tmaeno@u16:~$ dig +tcp -t ns trendmicro.ne.jp @ns01.cwidc.net.
;; communications error to 141.8.224.169#53: connection reset
tmaeno@u16:~$ dig +notcp -t ns trendmicro.ne.jp @ns01.cwidc.net.

; <<>> DiG 9.12.1 <<>> +notcp -t ns trendmicro.ne.jp @ns01.cwidc.net.
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 15740
;; flags: qr aa rd; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 3
;; WARNING: recursion requested but not available

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 1680
;; QUESTION SECTION:
;trendmicro.ne.jp.		IN	NS

;; ANSWER SECTION:
trendmicro.ne.jp.	300	IN	NS	ns28.rookdns.com.
trendmicro.ne.jp.	300	IN	NS	ns27.rookdns.com.

;; ADDITIONAL SECTION:
ns28.rookdns.com.	300	IN	A	141.8.224.170
ns27.rookdns.com.	300	IN	A	141.8.224.169

;; Query time: 158 msec
;; SERVER: 141.8.224.169#53(141.8.224.169)
;; WHEN: Mon Apr 23 13:15:32 JST 2018
;; MSG SIZE  rcvd: 126


}}}