启动 named： [确定]
测试解析新加入的记录 test.123.com：
[root@cp1 ~]# dig @192.168.147.137 test.123.com
; <<>> DiG 9.8.2rc1-RedHat-9.8.2-0.47.rc1.el6_8.4 <<>> @192.168.147.137 test.123.com
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 2695
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 1, ADDITIONAL: 1
;; QUESTION SECTION:
;test.123.com. IN A
;; ANSWER SECTION:
test.123.com. 86400 IN A 111.111.111.111
;; AUTHORITY SECTION:
123.com. 86400 IN NS ns.123.com.
;; ADDITIONAL SECTION:
ns.123.com. 86400 IN A 192.168.147.138
;; Query time: 0 msec
;; SERVER: 192.168.147.137#53(192.168.147.137)
;; WHEN: Tue Mar 14 00:53:47 2017
;; MSG SIZE rcvd: 79
1天刷新一次不方便测试，我们想只要主发生更改，从立即跟着更改：
在主上编辑配置文件：加入向从发送通知的配置
zone "123.com" IN {
type master;
file "123.com.zone";
notify yes;
also-notify { 192.168.147.138; };
};
zone "147.168.192.in-addr.arpa" IN {
type master;
file "147.168.192.zone";
notify yes;
also-notify { 192.168.147.138; };
};
检查配置：
[root@cp1 ~]# named-checkconf
重启：[root@cp1 ~]# /etc/init.d/named restart
停止 named：. [确定]
启动 named： [确定]
在从上测试：
发现从DNS上配置文件123.com.zone也自动更新：
[root@cp2 ~]# cat /var/named/slaves/123.com.zone
$ORIGIN .
$TTL 86400 ; 1 day
123.com IN SOA 123.com. admin.123.com. (
2015010902 ; serial
86400 ; refresh (1 day)
3600 ; retry (1 hour)
604800 ; expire (1 week)
10800 ; minimum (3 hours)
)
NS ns.123.com.
MX 5 mail.123.com.
$ORIGIN 123.com.
bbs CNAME www
mail A 192.168.147.137
ns A 192.168.147.138
test A 111.111.111.111
www A 11.11.11.11
测试解析 test.123.com：
[root@cp2 ~]# dig @192.168.147.138 test.123.com
; <<>> DiG 9.8.2rc1-RedHat-9.8.2-0.47.rc1.el6_8.4 <<>> @192.168.147.138 test.123.com
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 57454
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 1, ADDITIONAL: 1
;; QUESTION SECTION:
;test.123.com. IN A
;; ANSWER SECTION:
test.123.com. 86400 IN A 111.111.111.111
;; AUTHORITY SECTION:
123.com. 86400 IN NS ns.123.com.
;; ADDITIONAL SECTION:
ns.123.com. 86400 IN A 192.168.147.138
;; Query time: 0 msec
;; SERVER: 192.168.147.138#53(192.168.147.138)
;; WHEN: Tue Mar 14 00:58:05 2017
;; MSG SIZE rcvd: 79