dns域名解析原理
实验步骤1、主dns要完成dns解析：192.168.21.128
[root@localhost ~]# yum install bind -y
[root@localhost ~]# systemctl start named
[root@localhost ~]# vim /etc/named.conf
options {
listen-on port 53 { any; };
directory "/var/named";
allow-query { any; };
allow-transfer { 192.168.21.129; }; #转发给哪个从dns
}
zone "zhang.com." IN {
type master;
file "named.zhang.com";
};
zone "21.168.192.in-addr.arpa" IN {
type master;
file "named.192.168.21.zone";
};
[root@localhost ~]# cp -a /var/named/named.localhost /var/named/named.zhang.com
[root@localhost ~]# cp -a /var/named/named.localhost /var/named/named.192.168.21.zone
vim /var/named/named.zhang.com
vim /var/named/named.192.168.21.zone
[root@localhost ~]# systemctl restart named
[root@localhost ~]# systemctl stop firewalld
从：192.168.21.129
[root@localhost ~]# yum install bind -y
[root@localhost ~]# systemctl start named
[root@localhost ~]# vim /etc/named.conf
options {
listen-on port 53 { any; };
directory "/var/named";
allow-query { any; };
}
zone "zhang.com." IN {
type slave;
masters { 192.168.21.128; };
file "slaves/named.zhang.com";
};
zone "21.168.192.in-addr.arpa" IN {
type slave;
masters { 192.168.21.128; };
file "slaves/named.192.168.21.zone";
};
[root@localhost ~]# systemctl restart named
[root@localhost ~]# systemctl stop firewalld
测试：
注意：在安装软件前记得先挂载；
在配置文件时注意配置要求以及格式，如配置域名是xixi.com.后的"."如果缺少就可能导致报错；在named.zhang.com文件的配置时，注意区别A与PTR的区别及应用；注意防火墙有没有关闭等。
)
