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[동영상강좌] 39 이것이 리눅스다. 10장 01교시 : 메일서버 개념, 메일서버를 위한 네임서버 구현 [ Centos]

2017-09-03 18:46:12 By 머나먼나라 0 2051 댓글수 4 포스트 하기

5월 2024
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< Sever 컴퓨터 >

[root@localhost ~]# vi /etc/hostname

변경 = >
[root@localhost ~]# vi /etc/hostname
[root@localhost ~]# cat /etc/hostname
mail.naver.com

[root@localhost ~]# vi /etc/hosts

=>변경

127.0.0.1 localhost localhost.localdomain localhost4
localhost4.localdomain4
::1 localhost localhost.localdomain localhost6
localhost6.localdomain6

192.168.111.100 mail.naver.com

센드메일 설치
[root@localhost ~]# yum -y install sendmail

[root@localhost ~]# vi /etc/mail/local-host-names
변경 =>

# local-host-names - include all aliases for your machine here.

mail.naver.com

[root@localhost ~]# vi /etc/sysconfig/network

변경 =>
# Created by anaconda

HOSTNAME=mail.naver.com

=>재부팅

-----------------------------

9장에서 했던 내용 네임 서버 만들기

# yum -y install bind bind-chroot

[root@mail ~]# vi /etc/named.conf
행번호

: set number

변경 =>

12 options {
13 listen-on port 53 { any ;};
14 listen-on-v6 port 53 {none ; };
15 directory "/var/named";
16 dump-file "/var/named/data/cache_dump.db";
17 statistics-file "/var/named/data/named_stats.txt";
18 memstatistics-file "/var/named/data/named_mem_stats.txt";
19 allow-query { any; };

62 zone "naver.com" IN {
63
64 type master;
65 file "naver.com.db" ;
66 allow-update { none; };
67
68
69 };
-- INSERT --

zone "naver.com" IN {

   type master;
   file "naver.com.db" ;
   allow-update { none; };

};

zone "daum.net" IN {

type master;
file "daum.net.db" ;
allow-update { none; };

};

\> 리눅스 명령어
http://hyeonstorage.tistory.com/274

[root@mail ~]# cd /var/named
[root@mail named]# pwd
/var/named
[root@mail named]# ls
centos.com.db chroot data dynamic named.ca named.empty named.localhost
named.loopback slaves
[root@mail named]# touch naver.com.db

[root@mail named]# vi naver.com.db

$TTL 3H
@ SOA @ root. ( 2 1D 1H 1W 1H)
IN NS @
IN A 192.168.111.100
IN MX 10 mail.naver.com

mail IN A 192.168.111.100

카피
[root@mail named]# cp naver.com.db daum.net.db
[root@mail named]# vi daum.net.db
$TTL 3H
@ SOA @ root. ( 2 1D 1H 1W 1H)
IN NS @
IN A 192.168.111.200
IN MX 10 mail.daum.com

mail IN A 192.168.111.200

확인
[root@mail named]# named-checkconf

[root@mail named]# named-checkzone naver.com naver.com.db
zone naver.com/IN: naver.com/MX 'mail.naver.com.naver.com' has no address
records (A or AAAA)
zone naver.com/IN: loaded serial 2
OK
[root@mail named]# named-checkzone daum.net daum.net.db
zone daum.net/IN: daum.net/MX 'mail.daum.com.daum.net' has no address
records (A or AAAA)
zone daum.net/IN: loaded serial 2
OK

=>
포트를 여러게 열어야한다.
그러나 여기서는 테스트이다.
따라서 포트문제로 작동이 안되는 것을 방지 하기위해 방화벽을 중단시킨다.
[root@mail named]# systemctl stop firewalld
[root@mail named]# systemctl disable firewalld
Removed symlink /etc/systemd/system/dbus-
org.fedoraproject.FirewallD1.service.
Removed symlink /etc/systemd/system/basic.target.wants/firewalld.service.

작동하는지 확인
[root@mail named]# systemctl restart named
[root@mail named]# systemctl enable named
[root@mail named]# systemctl status named
● named.service - Berkeley Internet Name Domain (DNS)
Loaded: loaded (/usr/lib/systemd/system/named.service; enabled; vendor
preset: disabled)
Active: active (running) since 수 2017-04-26 18:54:38 KST; 44s ago
Main PID: 4781 (named)
CGroup: /system.slice/named.service
└─4781 /usr/sbin/named -u named

4월 26 18:54:38 mail.naver.com systemd[1]: Started Berkeley Internet Name
Domain (DNS).
4월 26 18:54:38 mail.naver.com named[4781]: zone 1.0.0.127.in-addr.arpa/IN:
loaded serial 0
4월 26 18:54:38 mail.naver.com named[4781]: zone localhost.localdomain/IN:
loaded serial 0
4월 26 18:54:38 mail.naver.com named[4781]: zone localhost/IN: loaded
serial 0
4월 26 18:54:38 mail.naver.com named[4781]: zone daum.net/IN: daum.net/MX
'mail.daum.com.daum.net' has no address rec... AAAA)
4월 26 18:54:38 mail.naver.com named[4781]: zone daum.net/IN: loaded serial
2
4월 26 18:54:38 mail.naver.com named[4781]: zone naver.com/IN: naver.com/MX
'mail.naver.com.naver.com' has no address... AAAA)
4월 26 18:54:38 mail.naver.com named[4781]: zone naver.com/IN: loaded
serial 2
4월 26 18:54:38 mail.naver.com named[4781]: all zones loaded
4월 26 18:54:38 mail.naver.com named[4781]: running
Hint: Some lines were ellipsized, use -l to show in full.

[root@mail named]# nslookup
> server 192.168.111.100
Default server: 192.168.111.100
Address: 192.168.111.100#53
> mail.naver.com
Server: 192.168.111.100
Address: 192.168.111.100#53

Name:   mail.naver.com
Address: 192.168.111.100
> mail.daum.net
Server:       192.168.111.100
Address:   192.168.111.100#53

Name: mail.daum.net
Address: 192.168.111.200
> exit

[root@mail named]# cd /etc/sysconfig/network-scripts/
[root@mail network-scripts]#

[root@mail network-scripts]# ls
ifcfg-ens32
[root@mail network-scripts]# vi ifcfg-ens32

100 으로 변경 =>
DNSI=192.168.111.100

재시작
#systemctl restart network

# cat /etc/resolv.conf