11.9作业

配置dns主从服务
要求从服务器能够定时从主服务器同步数据

主dns服务器配置

[root@localhost ~] vim /etc/resolv.conf
---------------------------------------------------------------
# Generated by NetworkManager
#nameserver 192.168.200.2
#nameserver 8.8.8.8
nameserver 192.168.200.128
---------------------------------------------------------------


[root@localhost ~]# vim /etc/named.conf 
---------------------------------------------------------------
options {
	listen-on port 53 { 192.168.200.128; };
	allow-query     { any; };
    allow-transfer { 192.168.200.129; };

};
#zone "." IN {
#       type hint;
#       file "named.ca";
#};
zone "openlab.com" IN {
        type master;
        file "named.openlab.com";
};
zone "200.168.192.in-addr.arpa" IN {
        type master;
        file "named.openlab.com";
};
---------------------------------------------------------------

接着添加相应的配置文件

[root@localhost ~] cp -a /var/named/named.localhost /var/named/named.openlab.com
[root@localhost ~] vim /var/named/named.openlab.com
[root@localhost ~] systemctl restart named

从dns服务器配置

[root@localhost ~] vim /etc/resolv.conf 
----------------------------------------------------------------
# Generated by NetworkManager
#search localdomain
#nameserver 192.168.200.2
nameserver 192.168.200.129
----------------------------------------------------------------


[root@localhost ~] vim /etc/named.conf 
----------------------------------------------------------------
options {
	listen-on port 53 { 192.168.200.129; };
	allow-query     { any; };
    
    dnssec-validation no;
};
#zone "." IN {
#       type hint;
#       file "named.ca";
#};
zone "openlab.com" IN {
        type slave;
        file "slaves/named.openlab.com";
        masters { 192.168.200.128; };
};
zone "200.168.192.in-addr.arpa" IN {
        type slave;
        file "slaves/named.openlab.com";
        masters { 192.168.200.128; };
};
----------------------------------------------------------------
[root@localhost ~] systemctl restart named

查看slaves文件夹，确认是否获取主dns服务器配置

测试【从dns服务器】