[CentOS 5.2] DNS 설정 & Hostname 변경

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hostname 변경
vi /etc/sysconfig/network
Networking = yes
Networking_IPV6= yes
Hostname = [원하는 호스트 주소]
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Dns Setting
# cat /etc/hosts
# cat /etc/resolv.conf
nameserver 164.124.101.2  -- 데이콤에서 사용하는 nameserver IP
nameserver 168.126.63.1   -- 코넷에서 사용하는 nameserver IP

[root@localhost src]# rpm -qa bind | grep bind
bind-9.3.4-10.P1.el5
bind-libs-9.3.4-10.P1.el5
bind-utils--9.3.4-10.P1.el5
ypbind-1.19-11.el5
[root@localhost src]# rpm -qa ypbind*
ypbind-1.19-11.el5
[root@localhost src]# rpm -qa bind|grep bind
bind-9.3.4-10.P1.el5
[root@localhost src]# rpm -qa | grep caching-nameserver
[root@localhost src]# yum -y install caching-nameserver*
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
 ... 중략 ...
Installing     : caching-nameserver                                [1/1]

Installed: caching-nameserver.i386 30:9.3.4-10.P1.el5
Complete!
[root@localhost src]# host
Usage: host [-aCdlriTwv] [-c class] [-N ndots] [-t type] [-W time]
            [-R number] hostname [server]
       -a is equivalent to -v -t *
       -c specifies query class for non-IN data
       -C compares SOA records on authoritative nameservers
       -d is equivalent to -v
       -l lists all hosts in a domain, using AXFR
       -i IP6.INT reverse lookups
       -N changes the number of dots allowed before root lookup is done
       -r disables recursive processing
       -R specifies number of retries for UDP packets
       -t specifies the query type
       -T enables TCP/IP mode
       -v enables verbose output
       -w specifies to wait forever for a reply
       -W specifies how long to wait for a reply
       -4 use IPv4 query transport only
       -6 use IPv6 query transport only
       -s a SERVFAIL response should stop query

[root@localhost src]# vi /etc/named.caching-nameserver.conf
//
// named.caching-nameserver.conf
...중략...
// caching-nameserver package upgrade.
//
options {
        listen-on port 53 { 127.0.0.1; };
        listen-on port 53 { any; };
        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     { any; };
};
logging {
        channel default_debug {
                file "data/named.run";
                severity dynamic;
        };
};
view localhost_resolver {
//        match-clients      { localhost; };
//        match-destinations { localhost; };
        match-clients      { any; };
        match-destinations { any; };
        recursion yes;
        include "/etc/named.rfc1912.zones";
};
:wq!
[root@localhost src]# cd /var/named
[root@localhost named]# ls -al
i?ⓒe³? 96
drwxr-x---  5 root  named 4096  7i?”  1 23:42 .
drwxr-xr-x 24 root  root  4096  6i?” 15 21:45 ..
drwxr-x---  5 root  named 4096  7i?”  1 23:42 chroot
drwxrwx---  2 named named 4096  1i?” 21 21:27 data
-rw-r-----  1 root  named  198  1i?” 21 21:27 localdomain.zone
-rw-r-----  1 root  named  195  1i?” 21 21:27 localhost.zone
-rw-r-----  1 root  named  427  1i?” 21 21:27 named.broadcast
-rw-r-----  1 root  named 1892  1i?” 21 21:27 named.ca
-rw-r-----  1 root  named  424  1i?” 21 21:27 named.ip6.local
-rw-r-----  1 root  named  426  1i?” 21 21:27 named.local
-rw-r-----  1 root  named  427  1i?” 21 21:27 named.zero
drwxrwx---  2 named named 4096  1i?” 21 21:27 slaves
[root@localhost log]# /etc/rc.d/init.d/named start
Starting named:                                            [  OK  ]
[root@localhost log]# tail /var/named/data/named.run
zone 0.in-addr.arpa/IN/localhost_resolver: loaded serial 42
zone 0.0.127.in-addr.arpa/IN/localhost_resolver: loaded serial 1997022700
zone 255.in-addr.arpa/IN/localhost_resolver: loaded serial 42
zone 0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.ip6.arpa/IN/localhost_resolver:

loaded serial 1997022700
zone localdomain/IN/localhost_resolver: loaded serial 42
zone localhost/IN/localhost_resolver: loaded serial 42
running
[root@localhost log]# cd /var/named/
[root@localhost named]# ls -al
total 96
drwxr-x---  5 root  named 4096 Jul  2 22:12 .
drwxr-xr-x 20 root  root  4096 Jul  2 22:08 ..
drwxr-x---  5 root  named 4096 Jul  2 22:12 chroot
drwxrwx---  2 named named 4096 Jul  2 22:18 data
-rw-r-----  1 root  named  198 Jan 21 21:27 localdomain.zone
-rw-r-----  1 root  named  195 Jan 21 21:27 localhost.zone
-rw-r-----  1 root  named  427 Jan 21 21:27 named.broadcast
-rw-r-----  1 root  named 1892 Jan 21 21:27 named.ca
-rw-r-----  1 root  named  424 Jan 21 21:27 named.ip6.local
-rw-r-----  1 root  named  426 Jan 21 21:27 named.local
-rw-r-----  1 root  named  427 Jan 21 21:27 named.zero
drwxrwx---  2 named named 4096 Jan 21 21:27 slaves
[root@localhost named]# vi /etc/named.rfc1912.zones
// Provided by Red Hat caching-nameserver package
//
// ISC BIND named zone configuration for zones recommended by
// RFC 1912 section 4.1 : localhost TLDs and address zones
//
// See /usr/share/doc/bind*/sample/ for example named configuration files.
//
zone "." IN {
        type hint;
        file "named.ca";
};

zone "localdomain" IN {
        type master;
        file "localdomain.zone";
        allow-update { none; };
};

zone "localhost" IN {
        type master;
        file "localhost.zone";
        allow-update { none; };
};

zone "0.0.127.in-addr.arpa" IN {
        type master;
        file "named.local";
        allow-update { none; };
};

zone "0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.ip6.arpa" IN {
        type master;
        file "named.ip6.local";
        allow-update { none; };
};

zone "255.in-addr.arpa" IN {
        type master;
        file "named.broadcast";
        allow-update { none; };
};

zone "0.in-addr.arpa" IN {
        type master;
        file "named.zero";
        allow-update { none; };
};

zone "example.co.kr" IN {
        type master;
        file "example.co.kr.zone";
        allow-update { none; };
};
:wq!
[root@localhost named]# cat named.ca

; <<>> DiG 9.5.0b2 <<>> +bufsize=1200 +norec NS . @a.root-servers.net
;; global options:  printcmd
;; Got answer:
...중략...
;; WHEN: Tue Feb 26 15:05:57 2008
;; MSG SIZE  rcvd: 615
[root@localhost named]# lftp ftp.internic.net
lftp ftp.internic.net:~> ls
drwxr-xr-x   2 ftp      ftp          4096 Jul  1 00:34 domain
lftp ftp.internic.net:/> cd domain/
cd ok, cwd=/domain
lftp ftp.internic.net:/domain> ls
-rw-r--r--   1 ftp      ftp           457 Jul  2 01:10 INTERNIC_ROOT_ZONE.signatures
-rw-r--r--   1 ftp      ftp           693 Jul  2 01:10 INTERNIC_ROOT_ZONE.signatures.asc
-rw-r--r--   1 ftp      ftp           690 Jul  2 00:52 arpa.zone.gz
...중략...-rw-r--r--   1 ftp      ftp            72 Mar 24 02:11 named.root.sig
-rw-r--r--   1 ftp      ftp         20870 Jul  2 01:10 root.zone.gz
-rw-r--r--   1 ftp      ftp            33 Jul  2 01:10 root.zone.gz.md5
-rw-r--r--   1 ftp      ftp            65 Jul  2 01:10 root.zone.gz.sig
lftp ftp.internic.net:/domain> get named.cache
2941 bytes transferred in 12 seconds (243b/s)
lftp ftp.internic.net:/domain> quit
[root@localhost named]# cat named.cache
;       This file holds the information on root name servers needed to
;       initialize cache of Internet domain name servers
...중략...
M.ROOT-SERVERS.NET.      3600000      A     202.12.27.33
M.ROOT-SERVERS.NET.      3600000      AAAA  2001:DC3::35
; End of File
[root@localhost named]# vi named.rev
$TTL    86400
@       IN      SOA     example.co.kr. example.localhost (
                                2009070200      ;       serial
                                1H              ;       Refresh
                                10M             ;       Retry
                                3600000         ;       Expire
                                86400)          ;       Minimum
        IN      NS      example.co.kr.
162     IN      PTR    example.co.kr.
:wq!
[root@localhost named]# vi example.co.kr.zone
$TTL    86400
@       IN      SOA     exma.     example.co.kr. (
                        2009070200 ; serial
                        1H      ;       Refresh
                        10M     ;       Retry
                        1W      ;       Expire
                        86400 ) ;       Minimum
        IN      NS      example.co.kr
        IN      A       192.168.0.2
        IN      MX 10   192.168.0.2
NS      IN      A       192.168.0.24
www     IN      A       210.93.84.64
mail    IN      CNAME   www
ftp     IN      CNAME   @
*       IN      CNAME   @
:wq!
[root@localhost named]# /etc/rc.d/init.d/named restart
Stopping named:                                            [  OK  ]
Starting named:                                            [  OK  ]
[root@localhost named]# tail /var/log/messages
Jul  3 00:52:08 localhost named[1636]: command channel listening on ::1#953
Jul  3 00:52:08 localhost named[1636]: zone 0.in-addr.arpa/IN/localhost_resolver: loaded serial 42
...중략...
notifies (serial 2009070200)
[root@localhost named]#

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CentOS 5.2에서 DNS설정하는 방법에 대해서 알아보았습니다.
적색 부분으로 표시되어 있는 부분은 직접 수정을 해줘야되는 부분이며, 마지막에 named.rev 파일과 example.co.kr.zone 파일을 직접 만들어줘야됩니다.

참고서적 : CentOS 5.2 리눅스 구축관리실무
               리눅스 서버관리 실무바이블(下)