RHEL5 简易DNS配置

RHEL5 简易DNS配置

RHEL5 DNS服务相关信息

Type: System V-managed service
• Packages: bind, bind-utils, blnd-chroot
• Daemons:/lusr/sbin/named,/lusr/sbin/rndc
• Script: /ete/init. d/named
• Ports: 53 (domain), 953(rndc)
• Configuration: (Under /var/named/chroot/) /etc/
named.conf,/var/named/*,/etc/rnde.key
• Related:caching-nameserver,openssl

1、安装DNS服务所需包

[root@redhat home]# rpm -qa |grep bind
bind-libs-9.3.3-7.el5
bind-devel-9.3.3-7.el5
bind-utils-9.3.3-7.el5
bind-9.3.3-7.el5
bind-sdb-9.3.3-7.el5
bind-libbind-devel-9.3.3-7.el5
ypbind-1.19-7.el5
bind-chroot-9.3.3-7.el5
[root@redhat home]# rpm -qa |grep caching-nameserver
caching-nameserver-9.3.3-7.el5

2.启动DNS服务 [root@redhat ~]# /etc/init.d/named start

[root@redhat ~]# chkconfig --level 345 named

关闭防火墙 [root@redhat ~]# /etc/init.d/iptables stop

将SElinux设为Permissive [root@redhat ~]# setenforce 0

3.[root@redhat ~]# cd /var/named/chroot/etc/

[root@redhat etc]# cp named.caching-nameserver.conf named.conf

[root@redhat etc]# chgrp named named.conf

[root@redhat etc]# vi named.conf

options {
        listen-on port 53 { 172.18.30.86; };
        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";
        query-source    port 53;
        query-source-v6 port 53;
};
logging {
        channel default_debug {
                file "data/named.run";
                severity dynamic;
        };
};
        include "/etc/named.rfc1912.zones";
"named.conf" 36L, 1109C     

添加自己DNS域名[root@redhat etc]# vim named.rfc1912.zones
zone "em.com" IN {
        type master;
        file "em.com.db";
};
注意上面的em.com.db这是一个存放DNS各种记录的区域文件，一会需要自己在/var/named/chroot/var/named/里面新建。

4.配置区域文件[root@redhat etc]# cd /var/named/chroot/var/named

   [root@redhat named]# cp localhost.zone em.com.db

   [root@redhat named]# chgrp named em.com.db

    [root@redhat named]# vim em.com.db

$TTL    86400
@               IN SOA @       root (
                                        42              ; serial (d. adams)
                                        3H              ; refresh
                                        15M             ; retry
                                        1W              ; expiry
                                        1D )            ; minimum

                                      IN NS           redhat.em.com
redhat                           IN A            172.18.30.86
dns.em.com                   IN A            172.18.30.86

5.重启bind服务，使用nslookup检测dns。

    #nslookup em.com