named 에서 DNS root 서버 리스트 갱신하기
2023.06.13 12:04
원문 : http://www.ischo.net -- 조인상 // 시스템 엔지니어
Writer : http://www.ischo.net -- ischo // System Engineer in Replubic Of Korea
+++++++++++++++++++++++++++++++++++++++++++++++++++++++
오래된 root 서버 리스트파일을 갖고 있다면 root 네임서버 리스트를 갱신해야 한다.
다음은 오래된 root 네임서버 파일의 예이다.
#############################################################################
; <<>> DiG 9.9.4-RedHat-9.9.4-38.el7_3.2 <<>> +bufsize=1200 +norec @a.root-servers.net
; (2 servers found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 17380
;; flags: qr aa; QUERY: 1, ANSWER: 13, AUTHORITY: 0, ADDITIONAL: 27
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 1472
;; QUESTION SECTION:
;. IN NS
;; ANSWER SECTION:
. 518400 IN NS a.root-servers.net.
. 518400 IN NS b.root-servers.net.
. 518400 IN NS c.root-servers.net.
. 518400 IN NS d.root-servers.net.
. 518400 IN NS e.root-servers.net.
. 518400 IN NS f.root-servers.net.
. 518400 IN NS g.root-servers.net.
. 518400 IN NS h.root-servers.net.
. 518400 IN NS i.root-servers.net.
. 518400 IN NS j.root-servers.net.
. 518400 IN NS k.root-servers.net.
. 518400 IN NS l.root-servers.net.
. 518400 IN NS m.root-servers.net.
;; ADDITIONAL SECTION:
a.root-servers.net. 3600000 IN A 198.41.0.4
a.root-servers.net. 3600000 IN AAAA 2001:503:ba3e::2:30
b.root-servers.net. 3600000 IN A 192.228.79.201
b.root-servers.net. 3600000 IN AAAA 2001:500:84::b
c.root-servers.net. 3600000 IN A 192.33.4.12
c.root-servers.net. 3600000 IN AAAA 2001:500:2::c
d.root-servers.net. 3600000 IN A 199.7.91.13
d.root-servers.net. 3600000 IN AAAA 2001:500:2d::d
e.root-servers.net. 3600000 IN A 192.203.230.10
e.root-servers.net. 3600000 IN AAAA 2001:500:a8::e
f.root-servers.net. 3600000 IN A 192.5.5.241
f.root-servers.net. 3600000 IN AAAA 2001:500:2f::f
g.root-servers.net. 3600000 IN A 192.112.36.4
g.root-servers.net. 3600000 IN AAAA 2001:500:12::d0d
h.root-servers.net. 3600000 IN A 198.97.190.53
h.root-servers.net. 3600000 IN AAAA 2001:500:1::53
i.root-servers.net. 3600000 IN A 192.36.148.17
i.root-servers.net. 3600000 IN AAAA 2001:7fe::53
j.root-servers.net. 3600000 IN A 192.58.128.30
j.root-servers.net. 3600000 IN AAAA 2001:503:c27::2:30
k.root-servers.net. 3600000 IN A 193.0.14.129
k.root-servers.net. 3600000 IN AAAA 2001:7fd::1
l.root-servers.net. 3600000 IN A 199.7.83.42
l.root-servers.net. 3600000 IN AAAA 2001:500:9f::42
m.root-servers.net. 3600000 IN A 202.12.27.33
m.root-servers.net. 3600000 IN AAAA 2001:dc3::35
;; Query time: 18 msec
;; SERVER: 198.41.0.4#53(198.41.0.4)
;; WHEN: Po kvě 22 10:14:44 CEST 2017
;; MSG SIZE rcvd: 811
#############################################################################
root 서버 리스트를 갱신하기 위해서는 다음의 차례를 따른다.
Step 1. root 캐시 파일을 백업한다.
# cp /var/named/root.ca /var/named/root.ca.bak
Step 2. root 캐시 파일을 갱신한다.
# dig +bufsize=1200 +norec NS . @a.root-servers.net > /var/named/named.ca
# cat /var/named/named.ca
Step 3. named 데몬 재시작
# service named restart
