DNS分布式数据库，倒树结构
域名 根域（.com/.edu） 子域
13个根服务器
辅助服务器
解析客户机的查询请求
vim /etc/services 953端口
rpm -ivh /mnt/Packages/bind-9.7.0-5.P2.el6.i686.rpm
rpm -ivh /mnt/Packages/bind-chroot-9.7.0-5.P2.el6.i686.rpm
rpm -ivh /mnt/Packages/bind-utils-9.7.0-5.P2.el6.i686.rpm
/etc/init.d/named restart
启动服务后/var/named/chroot 挂载
/etc/named.conf
DNS配置 /etc/resolv.conf
vim ifcfg-eth0
-------------------------------------配置dns服务------------------------
vim /var/named/chroot/etc/named.conf
options {
listen-on port 53 { any; };
listen-on-v6 port 53 { any; };
directory "/var/named";
dump-file "/var/named/data/cache_dump.db";
statistics-file "/var/named/data/named_stats.txt";
listen-on port 53 { any; };
listen-on-v6 port 53 { any; };
directory "/var/named";
dump-file "/var/named/data/cache_dump.db";
statistics-file "/var/named/data/named_stats.txt";
memstatistics-file "/var/named/data/named_mem_stats.txt";
allow-query { any; };
recursion yes;
dnssec-enable yes;
dnssec-validation yes;
dnssec-lookaside auto;
/* Path to ISC DLV key */
bindkeys-file "/etc/named.iscdlv.key";
};
logging {
channel default_debug {
file "data/named.run";
severity dynamic;
};
};
zone "." IN {
type hint;
file "named.ca";
};
zone "cmdns" IN {
type master;
file "cmdns.cn.zone";
};
include "/etc/named.rfc1912.zones";
配置cmdns.cn.zone /var/named/chroot/var/named/cmdns.cn.zone
$TTL 1D ---------设置默认缓存记录1Day，根目录"."
cmdns.cn. IN SOA dns.cmdns.cn. root.cmdns.cn. ( ---域管理邮箱root.cmdns.cn(root@cmdns.cn)
0 ; serial
1D ; refresh
1H ; retry
1W ; expire
3H ) ; minimum
cmdns.cn. NS dns.cmdns.cn.
dns.cmdns.cn. A 192.168.153.128
www.cmdns.cn. A 192.168.153.128
www1.cmdns.cn. CNAME www.cm.cn.