Master 配置 好了測試也正常了   

Slave 第一次也能生成 Zone 正反向檔案 .但就是奇怪.

在  Master 端修改了加大了 Serial number ,但   Slave 就是不同步.

最後才發現原來是這個問題:

zone "mydomain.com" { type master; file "mydomain.com.zone"; notify yes; allow-transfer { slave_servers; }; also-notify { slave_servers; }; };[/code:1:11bf6b342c] 6.2.14.1 notify If yes (the default), DNS NOTIFY messages are sent when a zone the server is authoritative for changes, see Section 3.3. The messages are sent to the servers listed in the zone’s NS records (except the master server identified in the SOA MNAME field), and to any servers listed in the also-notify option. If explicit, notifies are sent only to servers explicitly listed using also-notify. If no, no notifies are sent. The notify option may also be specified in the zone statement, in which case it overrides the options notify statement. It would only be necessary to turn off this option if it caused slaves to crash. 6.2.14.6 also-notify Defines a global list of IP addresses of name servers that are also sent NOTIFY messages whenever a fresh copy of the zone is loaded, in addition to the servers listed in the zone’s NS records. This helps to ensure that copies of the zones will quickly converge on stealth servers. If an also-notify list is given in a zone statement, it will override the options also-notify statement. When a zone notify statement is set to no, the IP addresses in the global also-notify list will not be sent NOTIFY messages for that zone. The default is the empty list (no global notification list). 使用notify指令會自動通知所有這個域的所有在ns記錄上的機器，also-notify指令可以用來通知所有不在ns記錄上的dns伺服器。 還是好好看文件吧，裡面還有很多有趣的功能呢。

最後修改了下Master 的 Zone 檔案

[root@ye810 /]# vi /var/named/named.baidu.com $TTL 3600 @ IN SOA baidu.com. huithe.163.com. ( 445 ; Serial 28800 ; Refresh 14400 ; Retry 3600000 ; Expire 86400 ) ; Minimum @ IN NS linux.baidu.com.; @ IN NS window.baidu.com.; linux IN A 192.168.1.200; window IN A 192.168.1.201; yehuiming IN A 111.111.111.111; mytxt IN TXT "fuck you"; wenwen IN CNAME yehuiming; love IN CNAME yehuiming; xxoo IN CNAME yehuiming; ooo IN CNAME yehuiming; yindang IN CNAME yehuiming; 51 IN CNAME yehuiming; 56 IN CNAME linux; 55 IN CNAME window;

添加了 Master 和  Slave 的 NS 記錄..  為啥要ns記錄.看上上面的官方解釋