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네임서버 버전 숨기기

· 2012-04-25 (수) 00:14:29 · 2880
 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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