第十天

SOA格式 ---（序列号，同步时间，重试时间，过期时间，TTL）

正向解析

[root@a ~]# mount /dev/sr0 /mnt
mount: /mnt: WARNING: device write-protected, mounted read-only.
[root@a ~]# yum install bind -y

[root@a ~]# vim /etc/named.conf

options {listen-on port 53 { 192.168.10.129; };directory       "/var/named";allow-query     { any; };
};zone "baidu.com" IN {type master;file "named.baidu.com";
};
zone "qq.com" IN {type master;file "named.qq.com";
};
~   

[root@a named]# vim named.baidu.com

$TTL 1D
@       IN      SOA     @       admin.admin.com. (20221104001D1H3H1D )NS      dns.baidu.com.
dns             A       192.168.10.129
www             A       192.168.11.11
ftp             A       192.168.10.129
mail            A       192.168.10.12
exmail          CNAME   mail

[root@a named]# vim named.qq.com

$TTL 1D
@       IN      SOA     @       admin.admin.com. (20221104001D1H3H1D )NS      dns.qq.com.
dns             A       192.168.10.129
www             A       192.168.11.11
ftp             A       192.168.10.129
mail            A       192.168.10.12
exmail          CNAME   mail

[root@a named]# systemctl restart named
[root@a named]# systemctl stop firewalld
[root@a named]# setenforce 0
 

[root@a named]# vim /etc/resolv.conf

# Generated by NetworkManager
search localdomain
nameserver 192.168.10.129                  

测试

ping

[root@a named]# ping www.baidu.com
PING www.baidu.com (192.168.11.11) 56(84) bytes of data.
^C
--- www.baidu.com ping statistics ---
15 packets transmitted, 0 received, 100% packet loss, time 14370ms

或者用nslookup测试 --- 解析

[root@a named]# nslookup mail.baidu.com
Server:        192.168.10.129
Address:    192.168.10.129#53

Name:    mail.baidu.com
Address: 192.168.10.12

不改变resolv.conf里的值，用nslookup解析

[root@a named]# vim /etc/resolv.conf --- 将值改回

# Generated by NetworkManager
search localdomain
nameserver 192.168.10.2           

[root@a named]# nslookup
> server 192.168.10.129
Default server: 192.168.10.129
Address: 192.168.10.129#53
> www.qq.com
Server:        192.168.10.129
Address:    192.168.10.129#53

Name:    www.qq.com
Address: 192.168.11.11
>

[root@a named]# vim /var/named/named.baidu.com

$TTL 1D
@       IN      SOA     @       admin.admin.com. (20221104001D1H3H1D )NS      dns.baidu.com.NS      dns.qq.com.
dns             A       192.168.10.129
www             A       192.168.11.11
ftp             A       192.168.10.129
mail            A       192.168.10.12
exmail          CNAME   mail

[root@a ~]# nslookup qq.com
Server:        192.168.10.2
Address:    192.168.10.2#53

Non-authoritative answer:
Name:    qq.com
Address: 123.151.137.18
Name:    qq.com
Address: 183.3.226.35
Name:    qq.com
Address: 61.129.7.47

反向解析

[root@a ~]# vim /etc/named.conf

options {listen-on port 53 { 192.168.10.129; };directory       "/var/named";allow-query     { any; };
};zone "baidu.com" IN {type master;file "named.baidu.com";
};
zone "qq.com" IN {type master;file "named.qq.com";
};
zone "10.168.192.in-addr.arpa" IN {type master;file "named.192";
};

[root@a ~]# vim /var/named/named.192

$TTL 1D
@       IN      SOA     @ admin (001D1H3H1D )IN      NS      dns.baidu.com.IN      NS      dns.qq.com.
129     IN      PTR     dns.baidu.com.
129     IN      PTR     dns.qq.com.
100     IN      PTR     www.baidu.com.
~                                      

将两个地址放到一个文件里

[root@a ~]# vim /etc/named.conf

options {listen-on port 53 { 192.168.10.129; };directory       "/var/named";allow-query     { any; };
};zone "baidu.com" IN {type master;file "named.baidu.com";
};
zone "qq.com" IN {type master;file "named.baidu.com";
};
zone "10.168.192.in-addr.arpa" IN {type master;file "named.baidu.com";
};

[root@a ~]# vim /var/named/named.baidu.com