公共域名解析服務

公共遞迴名稱服務(也稱為公共DNS解析)是一種名稱伺服器服務,用於替換或補充本地網際網路服務提供者(ISP)的提供的域名系統(DNS)。

使用公共DNS可能包括以下原因:

  • 與使用ISP的DNS服務相比,速度更快[1]
  • 過濾(安全、廣告攔截、成人內容等)[2]
  • 統計[3]
  • 避開審查制度[4]
  • 冗餘 (智慧型快取)[5]
  • 訪問官方DNS根中沒有的非官方頂級域名
  • ISP的DNS服務暫時無法使用

個別公共DNS服務營運商將保護隱私作為其服務的一個優勢;有批評者認為,使用這些服務公共DNS潛在大規模資料收集的風險。

公共DNS解析由商業公司營運向公眾免費提供服務,或者由私人愛好者營運用於傳播新技術和支援非營利社群。個別服務商開始提供安全DNS查詢傳輸服務,如DNS over HTTPS(DoH)和DNS over TLS(DoT)。

知名的公共DNS服務營運商

營運商 節點數 隱私權政策 DNS over UDP/TCP DNSSEC DNS over TLS DNS over HTTPS DNS over QUIC EDNS Padding 主機名稱 IPv4位址 IPv6位址 過濾 備註
AdGuard 12[6] [7] [8] [9] [10] dns.adguard.com 94.140.14.14
94.140.15.15
2a10:50c0::ad1:ff
2a10:50c0::ad2:ff
Default[11] 以隱私為導向的免費DNS解析系統,可阻止跟蹤、廣告和網路釣魚。[12]
dns-family.adguard.com (過時) 94.140.14.15
94.140.15.16
2a10:50c0::bad1:ff
2a10:50c0::bad2:ff
Family[11]
dns-unfiltered.adguard.com 94.140.14.140
94.140.14.141
2a10:50c0::1:ff
2a10:50c0::2:ff
[11]
CleanBrowsing英語CleanBrowsing 20 [13] [14] [15] [16] family-filter-dns.cleanbrowsing.org 185.228.168.168
185.228.169.168
2a0d:2a00:1::
2a0d:2a00:2::
Family 設計用於13歲以下兒童的裝置
adult-filter-dns.cleanbrowsing.org 185.228.168.10
185.228.169.11
2a0d:2a00:1::1
2a0d:2a00:2::1
Adult
security-filter-dns.cleanbrowsing.org 185.228.168.9
185.228.169.9
2a0d:2a00:1::2
2a0d:2a00:2::2
Security
Cloudflare 200[17] [18] [19] [20] [21] one.one.one.one[22]
1dot1dot1dot1.cloudflare-dns.com
1.1.1.1
1.0.0.1
2606:4700:4700::1111
2606:4700:4700::1001
dns64.cloudflare-dns.com 2606:4700:4700::64
2606:4700:4700::6400
用於僅有IPv6的網路[23]詳情請看IPv6過渡機制
security.cloudflare-dns.com 1.1.1.2
1.0.0.2
2606:4700:4700::1112
2606:4700:4700::1002
Malware, Phishing
family.cloudflare-dns.com 1.1.1.3
1.0.0.3
2606:4700:4700::1113
2606:4700:4700::1003
Malware, Phishing,
Adult content
Dyn英語Dyn (company) [24] resolver1.dyndnsinternetguide.com
resolver2.dyndnsinternetguide.com
216.146.35.35
216.146.36.36
於2022年5月31日關閉
Google 23[25] [26] [27] dns.google[28]
google-public-dns-a.google.com
google-public-dns-b.google.com
8.8.8.8
8.8.4.4
2001:4860:4860::8888
2001:4860:4860::8844
dns64.dns.google 2001:4860:4860::6464
2001:4860:4860::64
在NAT64閘道器中使用[29]
Neustar英語Neustar [30] 64.6.64.6

64.6.65.6

156.154.70.1
156.154.71.1

2620:74:1b::1:1

2620:74:1c::2:2

2610:a1:1018::1
2610:a1:1019::1

Verisign於2020年12月3日將其公共DNS(以64.和2620:開頭的IP)轉讓給Neustar[31]
156.154.70.2
156.154.71.2
2610:a1:1018::2
2610:a1:1019::2
Malware, ransomware, spyware, phishing
156.154.70.3
156.154.71.3
2610:a1:1018::3
2610:a1:1019::3
Low security + gambling, pornography, violence, hate
156.154.70.4
156.154.71.4
2610:a1:1018::4
2610:a1:1019::4
Medium security + gaming, adult, drugs, alcohol, anonymous proxies
156.154.70.5
156.154.71.5
2610:a1:1018::5
2610:a1:1019::5
不會將不存在的域名重新導向到別的頁面
Cisco Umbrella (OpenDNS) 31[32] [33] [34] [35] [36] dns.opendns.com
dns.umbrella.com[37]
208.67.222.222
208.67.220.220
2620:119:35::35
2620:119:53::53
Basic Security filtering + user defined policies
familyshield.opendns.com 208.67.222.123
208.67.220.123
2620:119:35::123
2620:119:53::123
"FamilyShield": adult content
sandbox.opendns.com 208.67.222.2
208.67.220.2
2620:0:ccc::2
2620:0:ccd::2
沙盒位址不提供任何過濾功能
OpenNIC [38] 部份[39] 部份[39] 部份[40] Several [41] 185.121.177.177
169.239.202.202
2a05:dfc7:5::53
2a05:dfc7:5::5353
OpenNIC Tier 2 DNS Resolvers頁面存檔備份,存於網際網路檔案館)列表
Quad9英語Quad9 149[42] [43] [44] [45] [46] [47] dns.quad9.net
rpz-public-resolver1.rrdns.pch.net
9.9.9.9
149.112.112.112
2620:fe::fe
2620:fe::9
Malicious domains (phishing, malware, exploit kit domains)
[48] dns-nosec.quad9.net 9.9.9.10
149.112.112.10
2620:fe::10
2620:fe::fe:10
Yandex [49] common.dot.dns.yandex.net 77.88.8.1
77.88.8.8
2a02:6b8::feed:0ff
2a02:6b8:0:1::feed:0ff
safe.dot.dns.yandex.net 77.88.8.2
77.88.8.88
2a02:6b8::feed:bad
2a02:6b8:0:1::feed:bad
"Safe": fraudulent / infected / bot sites
family.dot.dns.yandex.net 77.88.8.3
77.88.8.7
2a02:6b8::feed:a11
2a02:6b8:0:1::feed:a11
"Family": fraudulent / infected / bot / adult sites

知名的中國大陸公共DNS服務營運商

營運商 節點數 隱私權政策 DNS over UDP/TCP DNSSEC DNS over TLS DNS over HTTPS DNS over QUIC EDNS Padding 主機名稱 IPv4位址 IPv6位址 過濾 備註
阿里DNS alidns.com 223.5.5.5
223.6.6.6
2400:3200::1
2400:3200:baba::1
騰訊DNS dns.pub 119.29.29.29 2402:4e00::
114 DNS 114dns.com 114.114.114.114
114.114.115.115

參考文獻

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