1、
检验dns是否安装
# rpm �Cqa |grep bind
# rpm �Cqa |grep caching-nameserver
2、
DNS
的
3
个主要的配置文件
:
l
/etc/named.conf
l
/var/named/chroot/var/named/
正向区域文件
l
/var/named/chroot/var/named/
反向区域文件
假设创建一个
DNS
服务器,域名为
yxr.com
,主机名为
redhat
,
DNS
服务器
IP
地址为
192.168.100.1
,网络为
192.168.100.1/24
。同时创建正向和反向查找区域,正向解析区域为
yxr.com.zone
,反向区域文件为
100.168.192.in-addr.arpa.zone
。下面是
3
个主要配置文件的配置(更改部分均为突出颜色显示):
配置named.conf主配置文件
//
// named.conf for Red Hat caching-nameserver
//
options {
directory "/var/named";
dump-file "/var/named/data/cache_dump.db";
statistics-file "/var/named/data/named_stats.txt";
/*
* If there is a firewall between you and nameservers you want
* to talk to, you might need to uncomment the query-source
* directive below. Previous versions of BIND always asked
* questions using port 53, but BIND 8.1 uses an unprivileged
* port by default.
*/
// query-source address * port 53;
};
//
// a caching only nameserver config
//
controls {
inet
192.168.100.1
allow { localhost; } keys { rndckey; };
};
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 "yxr.com" IN{
type master;
file "yxr.com.zone";
allow-update { none; };
};
zone "
100.168.192
.in-addr.arpa" IN {
type master;
file "
100.168.192.in-addr.arpa.zone
";
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; };
};
include "/etc/rndc.key";
创建并配置
yxr.com.zone
正向解析文件
$TTL 86400
@ IN SOA redhat.yxr.com. root.yxr.com. (
2009100101 ; serial (d. adams )
28800 ; refresh
14400 ; retry
3600000 ; expiry
86400 ) ; minimum
@ IN NS redhat.yxr.com.
redhat IN A 192.168.100.1
www IN A 192.168.100.1
mail IN CNAME redhat.yxr.com.
yxr.com. IN MX 10 mail.yxr.com.
创建并配置
100.168.192.in-addr.arpa.zone
反向解析文件
$TTL 86400
@ IN SOA redhat.yxr.com. root.yxr.com. (
2009100101 ; serial (d. adams )
28800 ; refresh
14400 ; retry
3600000 ; expiry
86400 ) ; minimum
@ IN NS redhat.yxr.com.
1
IN PTR redhat.yxr.com.
1
IN PTR www.yxr.com.
1 IN PTR redhat.yxr.com.
3、
除了需要对以上
3
个配置文件进行配置外,在
DNS
服务器上还需要同时进行如下配置。
(1)
设置
IP
地址
# vi /etc/sysconfig/network-scripts/ifcfg-eth0
# service network restart
(2)
DNS
客户端设置
# vi /etc/resolv.conf
(3)
添加主机记录
4、
启动DNS
服务
# service named start
然后通过
# tail /var/log/messages
查看日志文件提示信息
在客户端上使用
nslookup
进行测试:
测试成功,表示
DNS
正向和反向均正常解析
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