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阿里云公共 DNS 免费版自 9 月 30 日开始限速
2024年9月30日24时起，阿里云公共DNS将对所有用户进行限速，影响所有使用阿里云公共DNS的用户，接入方式包括DoH、DoT和UDP、TCP（也就是所有接入方式）

IPv4地址：223.5.5.5, 223.6.6.6
IPv6地址：2400:3200::1, 2400:3200:baba::1
DoH/DoT地址: dns.alidns.com

限速规则：即DoH/DoT：单IP访问量20QPS，UDP/TCP流量上限2000bps

通常我们使用的都是UDP方式，2000bps中b是bit转换为字节为250Bps/s，DNS查询请求平均响应结果大小在50-100B之间，也就是每秒2-4次的UDP查询

大部分用户带宽都是NAT加持，多个用户共用一个出口IPv4

这应该是首个公开发布公告，宣称限速的公共DNS服务。
https://help.aliyun.com/zh/dns/public-dns-free-version-access-speed-limit-notification
https://serverfault.com/questions/79424/estimating-dns-bandwidth-average-size-of-a-dns-request

https://docs.dnspod.cn/public-dns/dot-doh/#%E4%B8%93%E4%B8%9A%E7%89%88
https://v2ex.com/t/975827

建议用户根据实际情况，选择或更换至其他DNS使用

wulabing的公告板
阿里云公共 DNS 免费版自 9 月 30 日开始限速
2024年9月30日24时起，阿里云公共DNS将对所有用户进行限速，影响所有使用阿里云公共DNS的用户，接入方式包括DoH、DoT和UDP、TCP（也就是所有接入方式）

IPv4地址：223.5.5.5, 223.6.6.6
IPv6地址：2400:3200::1, 2400:3200:baba::1
DoH/DoT地址: dns.alidns.com

限速规则：即DoH/DoT：单IP访问量20QPS，UDP/TCP流量上限2000bps

通常我们使用的都是UDP方式，2000bps中b是bit转换为字节为250Bps/s，DNS查询请求平均响应结果大小在50-100B之间，也就是每秒2-4次的UDP查询

大部分用户带宽都是NAT加持，多个用户共用一个出口IPv4

这应该是首个公开发布公告，宣称限速的公共DNS服务。
https://help.aliyun.com/zh/dns/public-dns-free-version-access-speed-limit-notification
https://serverfault.com/questions/79424/estimating-dns-bandwidth-average-size-of-a-dns-request

https://docs.dnspod.cn/public-dns/dot-doh/#%E4%B8%93%E4%B8%9A%E7%89%88
https://v2ex.com/t/975827

建议用户根据实际情况，选择或更换至其他DNS使用
Aliyun
公共DNS免费版接入限速通知_公网递归解析_云解析DNS(DNS)-阿里云帮助中心
涉及产品公共DNS是面向所有互联网用户的全球公共递归域名解析服务，本次限速仅影响公共DNS免费版（223.5.5.5、223.6.6.6等）。域名注册后使用公网权威DNS配置解析记录、权威解析等场景，与本公告内容无关，权威解析使用无变化。公共DNS本次限速仅影响公共DNS免费版（223.5.5.5、...
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阿里云公共 DNS 免费版自 9 月 30 日开始限速

wulabing的公告板 TG
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