最後更新: 2024-07-24

目錄

• DNS Server
• DNS Tools
• Domain name valid characters
• DNS Type
• Public DNS
•  

DNS Server

Mini:

• dnsmasq

Normal:

• bind
• maradns
• pdns-server

DNS Tools

• dig
• whois
• djbdns - A collection of Domain Name System tools
• ddns3-client - Issues dynamic DNS v3 requests

Domain name valid characters

• a-z
• A-Z
• 0-9
• -

Remark

只有 TXT, SRV, CNAME 可以用 underscore (_)

DNS Type

DoH(DNS over HTTPS)

via the HTTPS (POST/GET)

LINK=https://cloudflare-dns.com/dns-query

e.g.

curl --header "accept: application/dns-json" \
"${LINK}?name=example.com&type=A"

curl -s --header "accept: application/dns-json" \
"${LINK}?name=example.com&type=A" | jq .

Output 說明

• Status    # 0=NoError, 3=NXDomain # 詳見
• AD         # If true, it means that every record in the answer was verified with DNSSEC.

DoT(DNS over TLS)

Port: 853/TCP

Android 9 and Android 10 support DNS over TLS to secure your queries through encryption.

好處

• 1.1.1.1 does not need to be configured for each new Wi-Fi network

Setup

Settings > Network & internet > Advanced > Private DNS

Private DNS provider hostname: one.one.one.one

Public DNS

國外 DNS

Cloudflare

• 1.1.1.1
• 1.0.0.1
• 1.1.1.3         # Block malware and adult content
• 1.0.0.3

URL Test

• Block malware
  https://security.cloudflare-dns.com/dns-query
• Block malware and adult content
  https://family.cloudflare-dns.com/dns-query

Google

• 8.8.8.8
• 8.8.4.4

OpenDNS

• 208.67.222.222
• 208.67.220.220

國內 DNS

114DNS

• IP1: 114.114.114.114
• IP2: 114.114.115.115

阿里

• IP1: 223.5.5.5
• IP2: 223.6.6.6
• DOH/DOT: dns.alidns.com