네임서버 버전 숨기기
bind 를 설치했다.
yum -y install bind
yum -y install caching-nameserver
네임서버 시작
[root@www data1]# /etc/init.d/named start
Starting named: [ OK ]
버전 확인하기
[root@www data1]# dig @127.0.0.1 version.bind chaos txt
; <<>> DiG 9.3.6-P1-RedHat-9.3.6-16.P1.el5 <<>> @127.0.0.1 version.bind chaos txt
; (1 server found)
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 1432
;; flags: qr aa rd; QUERY: 1, ANSWER: 1, AUTHORITY: 1, ADDITIONAL: 0
;; QUESTION SECTION:
;version.bind. CH TXT
;; ANSWER SECTION:
version.bind. 0 CH TXT "9.3.6-P1-RedHat-9.3.6-16.P1.el5"
;; AUTHORITY SECTION:
version.bind. 0 CH NS version.bind.
;; Query time: 1 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Wed Sep 14 17:21:12 2011
;; MSG SIZE rcvd: 88
vi /etc/named.caching-nameserver.conf
options {
listen-on port 53 { 127.0.0.1; };
listen-on-v6 port 53 { ::1; };
directory "/var/named";
dump-file "/var/named/data/cache_dump.db";
statistics-file "/var/named/data/named_stats.txt";
memstatistics-file "/var/named/data/named_mem_stats.txt";
// Those options should be used carefully because they disable port
// randomization
// query-source port 53;
// query-source-v6 port 53;
allow-query { localhost; };
allow-query-cache { localhost; };
version "simple"; // ---> 추가
};
[root@www data1]# /etc/init.d/named restart
Stopping named: [ OK ]
Starting named: [ OK ]
다시 버전 정보 확인
[root@www data1]# dig @127.0.0.1 version.bind chaos txt
; <<>> DiG 9.3.6-P1-RedHat-9.3.6-16.P1.el5 <<>> @127.0.0.1 version.bind chaos txt
; (1 server found)
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 62275
;; flags: qr aa rd; QUERY: 1, ANSWER: 1, AUTHORITY: 1, ADDITIONAL: 0
;; QUESTION SECTION:
;version.bind. CH TXT
;; ANSWER SECTION:
version.bind. 0 CH TXT "simple"
;; AUTHORITY SECTION:
version.bind. 0 CH NS version.bind.
;; Query time: 1 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Wed Sep 14 17:33:31 2011
;; MSG SIZE rcvd: 63
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