dns服务搭建

Bind是DNS协议的一种实现，其运行的进程名为named。

Bind的配置文件

/etc/named.conf
/etc/named.iscdlv.key
/etc/named.rfc1912.zones
/etc/named.root.key

安装

yum -y install bind

/etc/named.conf

options {
        listen-on port 53 { 127.0.0.1;localhost; }; #设置监控能与外部主机通信的IP地址
        listen-on-v6 port 53 { ::1; };
        directory       "/var/named";  #指定区域数据文件的存放目录
        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; };  #限制查询的来源为本地
        recursion yes;  #是否开启递归查询
        dnssec-enable yes;  #学习时建议关闭
        dnssec-validation yes;  #学习时建议关闭
        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 {  #根区域，包含着多个DNS顶级域信息
        type hint; 
        file "named.ca";
};
include "/etc/named.rfc1912.zones";  #把区域管理文件的内容包含进此文件
include "/etc/named.root.key";

/etc/named.rfc1912.zones

zone "test.com" IN {        
    type master;               
    file "test.com.zone";   
};

/var/named/test.com.zone

$TTL 1D
$ORIGIN test.com.
@    IN SOA     ns1.test.com. dnsadmin.test.com. (
                    0    
                    1D    
                    1H    
                    1W    
                    3H )    
        IN      NS      ns1
        IN      MX   10 mx1
        IN      MX   20 mx2
ns1     IN      A       192.168.1.2
mx1     IN      A       192.168.1.3
mx2     IN      A       192.168.1.4
www     IN      A       192.168.1.4

启动：systemctl start named