# 子域 ## Server：192.168.1.211 ``` vim /var/named/example.com sub.example.com. IN NS dns.sub.example.com. dns.sub.example.com. IN A 192.168.1.210 vim /var/named/1.168.192.zone sub.example.com. IN NS dns.sub.example.com. 210 IN PTR dns.sub.example.com. systemctl restart named ``` ## Desktop：192.168.1.210 ``` vim /etc/named.conf zone "sub.example.com" IN { type master; file "sub.example.com"; }; zone "1.168.192.in-addr.arpa" IN { type master; file "1.168.192.sub.zone"; }; cd /var/named cp named.localhost sub.example.com cp named.localhost 1.168.192.sub.zone chgrp named sub.example.com 1.168.192.sub.zone vim sub.example.com $TTL 1D @ IN SOA dns.sub.example.com. root.sub.example.com. ( 0 ; serial 1D ; refresh 1H ; retry 1W ; expire 3H ) ; minimum @ IN NS dns.sub.example.com. dns IN A 192.168.1.210 @ IN MX 5 mail.sub.example.com. mail IN A 192.168.1.210 www IN A 192.168.1.210 vim 1.168.192.sub.zone $TTL 1D @ IN SOA dns.sub.example.com. root.sub.example.com. ( 0 ; serial 1D ; refresh 1H ; retry 1W ; expire 3H ) ; minimum @ IN NS dns.sub.example.com. 10 IN PTR dns.sub.example.com. @ IN MX 5 mail.sub.example.com. 10 IN PTR mail.sub.example.com. 10 IN PTR www.sub.example.com. systemctl start named ``` ## 物理机： vim /etc/resolv.conf nameserver 192.168.1.211 ### 高速缓存 options最后一行加一句 forwarders { 192.168.1.211; };