centos7下配置dns服务器

来源：互联网发布：网络认证编辑：程序博客网时间：2024/04/30 22:46

参考诸多资料，步骤如下：（说明：用a.com做dns解析用，解析b.com）

1、在centos上安装bind，命令yum install bind-chroot bind -y

2、拷贝bind相关文件,准备bind chroot 环境。[root@centos7 ~]# cp -R /usr/share/doc/bind-*/sample/var/named/* /var/named/chroot/var/named/

3、在bind chroot 的目录中创建相关文件

[root@centos7 ~]# touch /var/named/chroot/var/named/data/cache_dump.db

[root@centos7 ~]# touch /var/named/chroot/var/named/data/named_stats.txt

[root@centos7 ~]# touch /var/named/chroot/var/named/data/named_mem_stats.txt

[root@centos7 ~]# touch /var/named/chroot/var/named/data/named.run

[root@centos7 ~]# mkdir /var/named/chroot/var/named/dynamic

[root@centos7 ~]# touch /var/named/chroot/var/named/dynamic/managed-keys.bind

4、将 Bind 锁定文件设置为可写

[root@centos7 ~]# chmod -R 777/var/named/chroot/var/named/data

[root@centos7 ~]# chmod -R 777/var/named/chroot/var/named/dynamic

5、将 /etc/named.conf 拷贝到 bind chroot目录

[root@centos7 ~]# cp -p /etc/named.conf /var/named/chroot/etc/named.conf

6、配置named.conf文件

options {
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";
allow-query { any; };
/*
- If you are building an AUTHORITATIVE DNS server, do NOT enable recursion.
- If you are building a RECURSIVE (caching) DNS server, you need to enable
recursion.
- If your recursive DNS server has a public IP address, you MUST enable access
control to limit queries to your legitimate users. Failing to do so will
cause your server to become part of large scale DNS amplification
attacks. Implementing BCP38 within your network would greatly
reduce such attack surface
*/
recursion yes;

dnssec-enable yes;
dnssec-validation yes;
dnssec-lookaside auto;

/* Path to ISC DLV key */
bindkeys-file "/etc/named.iscdlv.key";

managed-keys-directory "/var/named/dynamic";

pid-file "/run/named/named.pid";
session-keyfile "/run/named/session.key";
};

logging {
channel default_debug {
file "data/named.run";
severity dynamic;
};
};

zone "." IN {
type hint;
file "named.ca";
};
zone "ns.a.com" IN {
type master;
file "a.com";
};
zone "b.com" IN {
type master;
file "b.com";
};
zone "1.168.192.in-addr.arpa" IN {
type master;
file "192.168.1.zone";
allow-transfer {192.168.1.2;};
};
include "/etc/named.rfc1912.zones"；

include "/etc/named.root.key";

7、配置正向解析文件

文件放在var/named目录下，要是不行一份到/var/named/chroot/var/named/

vi a.com

$TTL 1D
$TTL 600
@ IN SOA ns.a.com admin.a.com (
0 ;serial
1D ;refresh
1H ;retry
1w ;expire
3H ) ;minimum

@ IN NS ns
ns IN A 192.168.1.2

:wq保存退出

vi b.com$TTL 1D
$TTL 600
@ IN SOA b.com admin.b.com (
0 ;serial
1D ;refresh
1H ;retry
1w ;expire
3H ) ;minimum
@ IN NS ns.a.com.
www IN A 192.168.1.3

：wq保存退出

8、反向解析文件

vi 192.168.1.zone

$TTL 1D

$TTL 600
@ IN SOA 1.168.192.in-addr.arpa. admin.a.com. (
0 ;serial
1D ;refresh
1H ;retry
1W ;expire
3H ;minimum
)

@ IN NS ns.a.com.
240 IN PTR ns.a.com.

:wq保存退出

9、重启named服务，systemctl restart named

10、修改防火墙iptables，添加53端口

-A INPUT -m state --state NEW -m tcp -p tcp --dport 53 -j ACCEPT
-A INPUT -m state --state NEW -m udp -p udp --dport 53 -j ACCEPT

11、服务器的dns改成本机IP，修改/etc/resolv.conf文件

12、在文件/etc/hostname中修改服务器名字，最好对应做解析用的域名，比如ns.a.com

配置一下试试！

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