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Linux 네임서버 버전 숨기기

본문

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 ]

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