智能DNS服务器搭建

前期准备

查看IP

[root@localhost ~]# ip a | grep ens

2: ens32: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000

    inet 192.168.200.111/24 brd 192.168.200.255 scope global ens32

3: ens34: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000

    inet 172.16.1.1/24 brd 172.16.1.255 scope global ens34

[root@localhost ~]# systemctl stop firewalld

[root@localhost ~]# iptables -F

[root@localhost ~]# setenforce 0

setenforce: SELinux is disabled

[root@localhost ~]# yum -y install bind

修改主配置文件中为不同运营商的客户机地址准备不同的zone 区域设置，各自使用独立的数据文件

[root@localhost ~]# cat /var/named/wangtong.txt

acl wangtong {

172.16.1.3;

};

[root@localhost ~]# cat /var/named/dianxin.txt

acl dianxin {

172.16.1.2;

};

[root@localhost ~]# cat /etc/named.conf

options {

directory "/var/named";     

};                         

include "/var/named/dianxin.txt";

include "/var/named/wangtong.txt";

view "dianxin" {

match-clients { dianxin; };

zone "crushlinux.com" IN {

type master;

file "crushlinux.zheng.dianxin";

};

};

view "wangtong" {

match-clients { wangtong; };

zone "crushlinux.com" IN {

        type master;

        file "crushlinux.zheng.wangtong";

};

};

分别建立不同的区域数据文件

[root@localhost ~]# cd /var/named/

[root@localhost ~]# cat /var/named/crushlinux.zheng.dianxin

$TTL 86400

@INSOAcrushlinux.com.  admin.crushlinux.com. (

2019011001

3H

15M

1W

1D

)

INNSns.crushlinux.com.

INMX 10mail.crushlinux.com.

nsINA172.16.1.1

wwwINA172.16.1.12

mailINA172.16.1.12

[root@localhost ~]# cat /var/named/crushlinux.zheng.wangtong

$TTL 86400

@INSOAcrushlinux.com.  admin.crushlinux.com. (

2019011001

3H

15M

1W

1D

)

INNSns.crushlinux.com.

INMX 10mail.crushlinux.com.

nsINA172.16.1.1

wwwINA172.16.1.13

mailINA172.16.1.13

[root@localhost named]# chgrp named crushlinux.zheng.*

[root@localhost named]# ls -l crushlinux.zheng.*

-rw-r--r-- 1 root named 229 1月  10 23:51 crushlinux.zheng.lan

-rw-r--r-- 1 root named 214 1月  10 23:52 crushlinux.zheng.wan

[root@localhost named]# systemctl restart named

客户机设置网络模式为 vmnet2 IP地址为172.16.1.2 模拟电信用户，解析测试

C:UsersCrushlinux>nslookup www.crushlinux.com

服务器:  UnKnown

Address:  172.16.1.1

名称:    www.crushlinux.com

Address:  172.16.1.12

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中国各大运营商IP地址网段：

中国电信IP地址段：http://ispip.clang.cn/chinatelecom.html

中国联通（网通）IP地址段：http://ispip.clang.cn/unicom_cnc.html

中国移动IP地址段：http://ispip.clang.cn/cmcc.html

中国铁路IP 地址段：http://ispip.clang.cn/crtc.html

中国教育网IP地址段：http://ispip.clang.cn/cernet.html

中国其他ISP IP 地址段：http://ispip.clang.cn/othernet.html

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脚本编辑

[root@localhost ~]# cat ispip.sh

#!/bin/bash

 

url="http://ispip.clang.cn/"

for i in chinatelecom unicom_cnc cmcc crtc cernet othernet

do

wget $url$i.html -O /tmp/$i.txt

sed -n '/^[0-9]/ s/<br>/;/gp' /tmp/$i.txt | sed "1iacl $i {" | sed '$a};' > /var/named/$i.txt

done

[root@localhost ~]# chmod +x ispip.sh

[root@localhost ~]# crontab -e

**/5***/usr/sbin/ntpdate pool.ntp.org > /dev/null 2>&1

050***/bin/bash /root/ispip.sh

[root@localhost ~]# systemctl restart crond

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CDN加速基础原理