DNS 비사 - 왜 스위스(ch)는 dig 할 수 없을까?
(shkspr.mobi)-
dig domain NS명령으로 일반 도메인부터 TLD 네임서버를 볼 수 있음 -
dig kr NS는 되지만dig ch NS는 아무런 값이 나오지 않음. 왜 그럴까 ? - dig 의 결과 값 중
bbc.co.uk. 900 IN NS ddns1.bbc.com.- 여기서 IN 은 Internet을 의미함
- Chaosnet 이 CH 이기 때문에
dig ch NS는 Chaosnet을 검색하는 것 - Chaosnet은 1970년대에 사용했던 로컬 네트워크 기술
- 즉 스위스 도메인서버를 보려면
dig ch. NS라고 입력 해야함 - DNS 에는 IN 과 CH 외에 HS(Hesoid)도 있음. '여러분 이거 다 아시는거죠?'
➜ ~ dig in NS
; <<>> DiG 9.16.1-Ubuntu <<>> in NS
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 64139
;; flags: qr rd ad; QUERY: 1, ANSWER: 13, AUTHORITY: 0, ADDITIONAL: 0
;; WARNING: recursion requested but not available
;; QUESTION SECTION:
;. IN NS
;; ANSWER SECTION:
. 0 IN NS m.root-servers.net.
. 0 IN NS b.root-servers.net.
. 0 IN NS c.root-servers.net.
. 0 IN NS d.root-servers.net.
. 0 IN NS e.root-servers.net.
. 0 IN NS f.root-servers.net.
. 0 IN NS g.root-servers.net.
. 0 IN NS h.root-servers.net.
. 0 IN NS a.root-servers.net.
. 0 IN NS i.root-servers.net.
. 0 IN NS j.root-servers.net.
. 0 IN NS k.root-servers.net.
. 0 IN NS l.root-servers.net.
;; Query time: 0 msec
;; SERVER: 172.30.224.1#53(172.30.224.1)
;; WHEN: Fri Jul 15 11:02:18 KST 2022
;; MSG SIZE rcvd: 432
➜ ~ dig in. NS
; <<>> DiG 9.16.1-Ubuntu <<>> in. NS
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 59500
;; flags: qr rd ad; QUERY: 1, ANSWER: 6, AUTHORITY: 0, ADDITIONAL: 0
;; WARNING: recursion requested but not available
;; QUESTION SECTION:
;in. IN NS
;; ANSWER SECTION:
in. 0 IN NS ns1.registry.in.
in. 0 IN NS ns3.registry.in.
in. 0 IN NS ns2.registry.in.
in. 0 IN NS ns4.registry.in.
in. 0 IN NS ns5.registry.in.
in. 0 IN NS ns6.registry.in.
;; Query time: 120 msec
;; SERVER: 172.30.224.1#53(172.30.224.1)
;; WHEN: Fri Jul 15 11:02:25 KST 2022
;; MSG SIZE rcvd: 196