实验要求：
1.为区域linux.com配置分离解析，针对www.linux.com的A记录做分离测试。
2．当客户机来自内部用户192.168.100.0/24时，将www.linux.com解析为192.168.100.250。
3．当客户机来自外部用户其他网络时，将www.linux.com解析为100.100.100.100。
实现：为了简化实验网络结构，提供分离解析的DNS服务器配置有2个IP地址192.168.100.1/24(对内）和10.10.10.8/24（对外），以便模拟内部用户和外部用户连接。
一.安装软件包
# yum -y install bind bind-chroot
二.修改主配置文件
# vim /etc/named.conf
options {
listen-on port 53 { any; };
listen-on-v6 port 53 { ::1; };
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";
managed-keys-directory "/var/named/dynamic";
};
logging {
channel default_debug {
file "data/named.run";
severity dynamic;
};
};
acl "lan" { 192.168.100.0/24; }; //定义内网acl
acl "wan" { ! 192.168.100.0/24; any;}; //定义外网acl
view lan { //定义视图lan
match-clients { lan; }; //适用于lan定义的客户机地址
zone "." IN { //一定要写在VIEW里面
type hint;
file "named.ca";
};
zone "linux.com" {
type master;
file "lan.zone"; //视图lan的数据文件
};
};
view wan {
match-clients { wan; };
zone "." IN {
type hint;
file "named.ca";
};
zone "linux.com" {
type master;
file "wan.zone";
};
};
include "/etc/named.root.key";
三.创建区域数据库文件
# vim /var/named/lan.zone
$TTL 3H
@ IN SOA linux.com. root.linux.com. (
2014050101; serial
1D; refresh
1H; retry
1W; expire
3H ); minimum
NS dns1.linux.com.
dns1 IN A 192.168.100.1
www IN A 192.168.100.250
# vim /var/named/lan.zone
$TTL 3H
@ IN SOA linux.com. root.linux.com. (
2014050101; serial
1D; refresh
1H; retry
1W; expire
3H ); minimum
NS dns1.linux.com.
dns1 IN A 10.10.10.8
www IN A 100.100.100.100
四.启动服务
# service named start
# chkconfig named on
五.本机测试
指定192.168.100.1作为DNS服务器，这样相当于来自内网。则查询www.linux.com时，适用于lan视图，结果是192.168.100.250：
# nslookup www.linux.com 192.168.100.1
Server: 192.168.100.1
Address: 192.168.100.250#53
Name: www.linux.com
Address: 192.168.100.250
指定10.10.10.8作为DNS服务器，这样相当于来自外网。则查询www.linux.com时，适用于wan视图，结果是100.100.100.100：
# nslookup www.linux.com 10.10.10.8
Server: 10.10.10.8
Address: 100.100.100.100#53
Name: www.linux.com
Address: 100.100.100.100