CentOS-5.6-x86_64-bin下DNS安装基础篇(5)

6、辅助DNS
备注：安装内容同主DNS安装
# scp -p 22 root@192.168.113.100:/var/named/chroot/etc/* ./       //拷贝主DNS服务器配置文件到辅助DNS上
# chown root.named /var/named/chroot/etc/named.conf   //修改其权限
备注：以上操作在辅助DNS上操作
（1）修改主DNS服务器配置文件
# vim /etc/named.rfc1912.zones
### 配置内容如下：
zone "." IN {
        type hint;
        file "named.ca";
};
zone "laowafang.com" IN {
        type master;
        file "laowafang.com.zone";
        allow-update { none; };
        allow-transfer{ 192.168.113.101; };    //注意{空格192.168.113.101;空格}分号
        also-notify{ 192.168.113.101; };
};
zone "113.168.192.in-addr.arpa" IN {
        type master;
        file "laowafang.com.local";
        allow-update { none; };
        allow-transfer{ 192.168.113.101; };
        also-notify{ 192.168.113.101; };
};
### 结束 ###
（2）修改辅助DNS服务器配置文件
# vim /etc/named.rfc1912.zones
### 配置内容如下：
zone "." IN {
        type hint;
        file "named.ca";
};
zone "laowafang.com" IN {
        type slave;
        file "slaves/laowafang.com.zone";
        masters { 192.168.113.100; };
};
zone "113.168.192.in-addr.arpa" IN {
        type slave;
        file "slaves/laowafang.com.local";
        masters { 192.168.113.100; };
};
### 结束 ###
# ln -s /var/named/chroot/etc/named.conf /etc/    //创建软连接
# ll /etc/name*  //查看连接是否创建成功
# service named restart
# tail /var/log/messages    //查看日志存在 running 及成功启动
# ls /var/named/chroot/var/named/slaves/   //查看是否同步了区域文件
7、注意事项
（1）注意/var/named/chroot/etc/named.conf文件的权限：root.named
（2）the working directory is not writable 可以尝试加权限解决：
 # chmod g+w /var/named/chroot/var/named
（3）主辅同步测试时需要修改serial值 42+

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