利用veiw建立Centos5.5 双机智能DNS手册
一、     环境
1、2台centos5.5服务器
2、ip规划：NS1：192.168.253.251
           NS2：192.168.253.252
                 192.168.253.250（同步电信使用）
                 192.168.253.253（同步联通使用）
                 192.168.253.250（同步移动使用）
二、基础配置
1、NS1指定DNS服务器为192.168.253.252/192.168.253.251
   NS2指定DNS服务器为192.168.253.251/192.168.253.252
2、同步系统时间
三、DNS组件安装
#yum install bind
#yum install bind-libs
#yum install bind-utils
#yum install bind-chroot
#yum install caching-nameserver
四、主DNS配置
   
1、named.conf配置
[root@localhost etc]# vi named.conf
 options {
     directory "/var/named";
     listen-on port 53 {any;};
        };
include "/etc/ct.cfg";
include "/etc/cnc.cfg";
include "/etc/mob.cfg";
 view "ct_zone" {
          match-clients { ct;192.168.253.250; };
          recursion yes;
          zone "test.cn" {
          type master;
          allow-transfer { 192.168.253.250; };
           allow-update { none; };
          file "ct/test.cn";
                }; 
zone "." IN {
        type hint;
        file "named.ca";};
};
 
view "cnc_zone" {
            match-clients {cnc;192.168.253.253; };
            recursion yes;
            zone "test.cn" {
            type master;
             allow-update { none; };
            allow-transfer { 192.168.253.253; };
            file "cnc/test";}; 
zone "." IN {
        type hint;
        file "named.ca";};
};
view "mob_zone" {
           match-clients {mob;192.168.253.254; };
           recursion yes;
           zone "test" {
           type master;
            allow-update { none; };
           allow-transfer {192.168.253.254; };
           file "mob/test";
};
zone "." IN {
        type hint;
        file "named.ca";};
};
2、3家isp地址段定义ct.cfg\cnc.cfg\mob.cfg
acl ct {
10.31.0.0/16;
58.16.0.0/14;
……….};
acl cnc {
58.32.0.0/11;
58.208.0.0/12;
……….};
acl mob {
211.136.0.0/16;
211.137.0.0/16;
……….};
 
3、建立3个存放zone文件的文件夹
4、在ct\cnc\mob文件夹下分别建立test.cn
ct：test.cn
 $TTL 3600       ; 1 hour default TTL
@ IN SOA ns1.test.cn. mail.test.cn. (
                        2012082104     ;Serial
                        7200          ;Refresh
                        3600           ;Retry
                        1209600         ;Expire
                        3600           ;Negative Reponse TTL
                    )
 ;DNS Servers
@     IN NS     ns1.test.cn.
@     IN NS     ns2.test.cn.
ns1       A   192.168.253.251
ns2       A   192.168.253.252
Www           A     1.1.1.1
==================================================================== 
Mob:test.cn
$TTL 3600       ; 1 hour default TTL
@ IN SOA ns1.test.cn. skss.test.cn. (
                        2012082104     ;Serial
                        7200          ;Refresh
                        3600           ;Retry
                        1209600         ;Expire
                        3600            ;Negative Reponse TTL
                    )
 
;DNS Servers
@     IN NS     ns1.test.cn.
@     IN NS     ns2.test.cn.
ns1       A   192.168.253.251
ns2       A   192.168.253.252
Www           A     2.2.2.2
 ====================================================================
 Cnc:test.cn
 
$TTL 3600       ; 1 hour default TTL
@ IN SOA ns1.test.cn. skss.test.cn. (
                        2012082104     ;Serial
                        7200          ;Refresh
                        3600           ;Retry
                        1209600         ;Expire
                        3600            ;Negative Reponse TTL
                    )
 
;DNS Servers
@     IN NS     ns1.test.cn.
@     IN NS     ns2.test.cn.
ns1       A   192.168.253.251
ns2       A   192.168.253.252
Www           A     3.3.3.3
五、备机配置
1、安装dns组件
#yum install bind
#yum install bind-libs
#yum install bind-utils
#yum install bind-chroot
#yum install caching-nameserver
2、配置网卡地址
3、配置named.conf
  
options { 
    directory "/var/named";
    listen-on port 53 {any;};
    };
include "/etc/ct.cfg";
include "/etc/cnc.cfg";
include "/etc/mob.cfg";
 
view "ct_zone" {
        match-clients { ct;192.168.253.250;};
        transfer-source 192.168.253.250;
        recursion yes;
        zone "test.cn" {
                     type slave;
                     masters {192.168.253.251;};
                     file "ct/test.cn";
                            };
zone "." IN {
        type hint;
        file "named.ca";};
 
};
 
view "cnc_zone" {
          match-clients {cnc;192.168.253.253; };
          transfer-source 192.168.253.253;
          recursion yes;
          zone "test.cn" {
                 type slave;
                 masters {
                    192.168.253.251;};
 
                 file "cnc/test.cn";
                         };
        zone "." IN {
        type hint;
        file "named.ca";};
};
 
view "mob_zone" {
           match-clients {mob;192.168.253.254; };
           transfer-source 192.168.253.254;
           recursion yes;
           zone "test.cn" {
                 type slave;
           masters {
                192.168.253.251;};
 
             file "mob/test.cn";
 
                              };
zone "." IN {
        type hint;
        file "named.ca";};
};
4、建立3家isp地址段文件acl文件（与主一致）
5、建立存放zone文件的文件夹
6、写入权限
chomn 770 ct cnc mob
chmod named.named ct cnc mob   
六、测试
启动2台服务器的DNS服务
用3家运行商地址分别解析，查看结果