SmartDNS是推薦本地運行的DNS服務器，SmartDNS接受本地客戶端的DNS查詢請求，從多個上游DNS服務器獲取DNS查詢結(jié)果，并將訪問速度最快的結(jié)果返回給客戶端，提高網(wǎng)絡訪問速度和準確性。 支持指定域名IP地址，達到禁止過濾的效果。
一 安裝smartdns

1?關(guān)閉Ubuntu自帶dns解析systemd-resolved

#查看端口
sudo netstat -lnp|grep 53
tcp        0      0 127.0.0.54:53           0.0.0.0:*               LISTEN      698/systemd-resolve 
tcp        0      0 127.0.0.53:53           0.0.0.0:*               LISTEN      698/systemd-resolve 
udp        0      0 127.0.0.54:53           0.0.0.0:*                           698/systemd-resolve 
udp        0      0 127.0.0.53:53           0.0.0.0:*                           698/systemd-resolve 
raw6       0      0 :::58                   :::*                    7           553/systemd-network 
unix  2      [ ACC ]     STREAM     LISTENING     9453     924/systemd          /run/user/1000/pk-debconf-socket
#關(guān)閉
sudo systemctl disable systemd-resolved
sudo systemctl stop systemd-resolved

2 安裝?smartdns

sudo  apt update
sudo  apt-get  install smartdns
#查看版本
test@test:~$ smartdns -v
smartdns 45+dfsg-1build2
#啟動
sudo systemctl enable smartdns
sudo systemctl start smartdns

二 配置smartdns

sudo vim /etc/smartdns/smartdns.conf
#接口綁定信息
bind-tcp [::]:53
bind :53
#開啟過期緩存
serve-expired yes
#過期時間
serve-expired-ttl 0
#緩存數(shù)量
cache-size 68888
#域名TTL最小值和最大值
rr-ttl-min 60
rr-ttl-max 866000
# 上游DNS返回多個結(jié)果時，測速的方法
speed-check-mode tcp:80,tcp:443,ping
#日志記錄等級（warn，info，debug）
log-level info
log-file /var/log/smartdns/smartdns.log
log-size 2m #日志大小
log-num 1 #日志歸檔個數(shù)
#配置上游dns服務器
#阿里dns
server 223.5.5.5
server 223.6.6.6
#騰訊dns
server 119.29.29.29
#配置server的組關(guān)系
server 8.8.8.8 -group google -exclude-default-group
server 8.8.4.4 -group whatsappdns -exclude-default-group
server-tcp 8.8.4.4
#配置address,解析指定的域名和IP
address /www.test.com/192.168.50.13

三 測試驗證

1 ubuntu 系統(tǒng)

#第一次查詢
test@test:~$ dig www.csdn.net; <<>> DiG 9.18.24-0ubuntu5-Ubuntu <<>> www.csdn.net
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 32569
;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 0;; QUESTION SECTION:
;www.csdn.net.			IN	A;; ANSWER SECTION:
www.csdn.net.		3	IN	CNAME	55cb88f4.csdn.net.cname.yunduns.com.
55cb88f4.csdn.net.cname.yunduns.com. 3 IN A	220.185.184.18;; Query time: 532 msec
;; SERVER: 127.0.0.53#53(127.0.0.53) (UDP)
;; WHEN: Sat Jun 01 17:45:37 CST 2024
;; MSG SIZE  rcvd: 95#第二次查詢
test@test:~$ dig www.csdn.net; <<>> DiG 9.18.24-0ubuntu5-Ubuntu <<>> www.csdn.net
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 36998
;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 0;; QUESTION SECTION:
;www.csdn.net.			IN	A;; ANSWER SECTION:
www.csdn.net.		32	IN	CNAME	55cb88f4.csdn.net.cname.yunduns.com.
55cb88f4.csdn.net.cname.yunduns.com. 32	IN A	220.185.184.18;; Query time: 0 msec
;; SERVER: 127.0.0.53#53(127.0.0.53) (UDP)
;; WHEN: Sat Jun 01 17:46:05 CST 2024
;; MSG SIZE  rcvd: 95
#測試域名查詢
test@test:~$ dig www.test.com; <<>> DiG 9.18.24-0ubuntu5-Ubuntu <<>> www.test.com
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 41058
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0;; QUESTION SECTION:
;www.test.com.			IN	A;; ANSWER SECTION:
www.test.com.		60	IN	A	192.168.50.13;; Query time: 0 msec
;; SERVER: 127.0.0.53#53(127.0.0.53) (UDP)
;; WHEN: Sat Jun 01 17:49:50 CST 2024
;; MSG SIZE  rcvd: 46

2??windoes 11系統(tǒng)

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