参考原文链接：https://pymumu.github.io/smartdns/

Step 1 下载SmartDNS

1	wget https://github.com/pymumu/smartdns/releases/download/Release33/smartdns.1.2020.09.08-2235.x86_64-linux-all.tar.gz

Step 2 解压并安装

tar zxf smartdns.1.2020.09.08-2235.x86_64-linux-all.tar.gz
cd smartdns
chmod +x ./install
./install -i

Step 3 编辑配置

nano /etc/smartdns/smartdns.conf

server-name smartdns
bind 192.168.1.6:53
cache-size 4096
cache-persist yes
cache-file /tmp/smartdns.cache
server 223.5.5.5
server 119.29.29.29
server 101.226.4.6
server 8.8.8.8

Step 4 停止系统DNS服务

1 2	systemctl stop systemd-resolved.service systemctl disable systemd-resolved.service

Step 5 修改/etc/resolv.conf文件

nano /etc/resolv.conf

#nameserver 127.0.0.53
nameserver 192.168.1.6

Step 6 启动服务

1 2	systemctl enable smartdns systemctl start smartdns

Step 7 验证服务

nslookup -querytype=ptr smartdns

$ nslookup -querytype=ptr smartdns
Server:		192.168.1.6
Address:	192.168.1.6#53

Non-authoritative answer:
smartdns	name = smartdns.

Step 8 检查结果

nslookup www.baidu.com 192.168.1.6

$nslookup www.baidu.com 192.168.1.6
Server:		192.168.1.6
Address:	192.168.1.6#53

Non-authoritative answer:
www.baidu.com	canonical name = www.a.shifen.com.
Name:	www.a.shifen.com
Address: 36.152.44.95