高速缓存DNS

高速缓存DNS

DNS

客户端

修改dns

vim /etc/resolv.conf

# Generated by NetworkManager

search ilt.example.com example.com

nameserver 172.25.254.124

dig baidu.com

服务端

yum install bind -y

firewall-cmd --permanent --add-service=dns

firewall-cmd --reload

setenforce 0

netstat -antulpe | grep named

vim /etc/named.conf

listen-on port 53 { any; };##设定端口开放 any表示对所有interface开放

allow-query     { any; };##回答所有人的问题

forwarders      {172.25.254.250;};##缓存谁的答案

dnssec-validation no;

systemctl restart named

正向解析

vim /etc/name.rfc1912.zones

zone "taxing.com" IN {

域名

type master;

file "taxing.com.zone";#域名管理文件名

allow-update { none; };

};

cp /var/named/named.localhost /var/name/taxing.come.zone

vim /var/name/taxing.come.zone

$TTL 1D#缓存更新时间

@       IN SOA  dns.taxing.com. timo.taxing.come. (

起始地址 dns域名           域名管理员

0       ; serial

1D      ; refresh

1H      ; retry

1W      ; expire

3H )    ; minimum

NS      dns.taxing.com.

dns     A       172.25.254.124

    A       172.25.254.152

    A       172.25.254.253

bbs     CNAME   taxing.com.

taxing.com.     MX 1    172.25.254.124.

systemctl restart named

客户端dig taxing.com

快速访问

dig -t mx taxing.com

dig bbs.taxing.com

反向解析

vim /etc/named.rfc1912.zones

zone "254.25.172.in-addr.arpa" IN {

type master;

file "rito.com.zone";

allow-update { none; };

vim rito.com.zone

$TTL 1D

@       IN SOA  dns.rito.com. timo.rito.com. (

0       ; serial

1D      ; refresh

1H      ; retry

1W      ; expire

3H )    ; minimum

NS      dns.rito.com.

A       172.25.254.124

178     PTR     timo.com.

195     PTR     shasi.com.

systemctl restart named

客户端

dig -x 172.25.254.178

内外网

vim named.conf

view localnet {

match-clients{172.25.254.124;};

zone "." IN {

type hint;

file "named.ca";

};

include "/etc/named.rfc1912.zones";

};

view internet {

match-clients {any;};

zone "." IN {

type hint;

file "named.ca";

};

include "/etc/named.rfc1912.zones.inter";

};

cp -p taxing.com.zone taxing.com.zone.inter

cp -p named.rfc1912.zones named.rfc1912.zones.inter

可改变taxing.com.zone.inter里面的网段来显示

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