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Protective Domain Name Service (PDNS)

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hbghlyj Posted at 2023-6-28 04:43:07 |Read mode
Site blocked
You tried to visit: kuing.infinityfreeapp.com
This site may be involved in malicious activity or associated with malware and so access has been blocked.                    
Contact your local IT support team or System Administrator for help.
Find out more about the Protective DNS. You can also use Blockcheck to check whether a site is blocked.
Screenshot 2023-06-27 214122.png
ncsc.gov.uk
The National Cyber Security Centre is an organisation of the United Kingdom Government that provides advice and support for the public and private sector in how to avoid computer security threats. Based in London, it became operational in October 2016, and its parent organisation is GCHQ. Wikipedia

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kuing Posted at 2023-6-28 11:36:10
可以解释下是啥意思吗(用中文

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网域被PDNS屏蔽了,域名解析到这个提示的网页😕  Posted at 2023-6-28 16:36
因为校园网是用PDNS的DNS服务,所以我遇到了此问题😥  Posted at 2023-6-28 21:35

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kuing Posted at 2023-6-28 16:59:34
PDNS 是啥?有何用处?

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直连校园网时,发现域名kuing.infinityfreeapp.com被解析到25.25.25.80(即PDNS)  Posted at 2023-6-28 21:29
cmd 运行命令nslookup kuing.infinityfreeapp.com的结果是25.25.25.80  Posted at 2023-6-28 21:30
在其它地区,运行命令nslookup kuing.infinityfreeapp.com的结果都是185.27.134.213(正确的IP)  Posted at 2023-6-28 21:31
PDNS是不强制使用的公共服务,阻止用户访问诈骗网站。因为校园网使用了PDNS,而我是校园网的用户,所以我遇到了此问题😥  Posted at 2023-6-28 21:38

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 Author| hbghlyj Posted at 2023-6-28 21:23:38
kuing 发表于 2023-6-28 09:59
PDNS 是啥?有何用处?
PDNS 的构建是为了阻止使用 DNS 进行恶意软件分发和操作。它由 NCSC 创建,并由 Nominet 实施。

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 Author| hbghlyj Posted at 2023-6-28 21:25:11
Last edited by hbghlyj at 2023-7-24 01:40:00C:\Windows\System32\Drivers\etc\hosts添加一行
  1. 185.27.134.213 kuing.infinityfreeapp.com
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Screenshot 2023-06-28 142419.png (保存需管理员权限)保存后,立即就能访问了不需要重启

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 Author| hbghlyj Posted at 2023-6-29 00:57:49
Last edited by hbghlyj at 2023-7-24 01:40:00Windows官方的hosts文件示例有一行
  1. #      102.54.94.97     rhino.acme.com          # source server
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Blockcheck
发现这个域名竟也被屏蔽了 Screenshot 2023-06-28 at 17-40-51 Protective Domain Name Service (PDNS).png

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 Author| hbghlyj Posted at 2023-7-24 01:21:25
Last edited by hbghlyj at 2023-7-24 01:42:00修改hosts只是在一些网站不使用PDNS,用下面的方法彻底不使用PDNS:
在Window设置页面Network internet > Advanced network settings > Network adapters > View additional properties看到:DNS被更改为129.67.1.1和163.1.2.1 Screenshot 2023-07-24 011921.png
原来是openconnect修改网络适配器的DNS设置
连接过程中命令行有信息
  1. Configured 2 DNS servers:129.67.1.1 163.1.2.1
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help center列出的DNS resolvers相同
Screenshot 2023-07-24 011738.png

C:\Program Files\OpenConnect\vpnc-script-win.js定位到产生信息是第189行:把第177行
  1. var dns = env("INTERNAL_IP4_DNS").split(/ /);
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改为通常的DNS服务的IP例如Clouldflare 1.1.1.1、谷歌8.8.8.8/8.8.4.4、Public DNS Servers in China
  1. var dns = ['1.1.1.1','8.8.8.8','8.8.4.4']
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再运行openconnect就能看到配置了这些DNS Servers: Screenshot 2023-07-24 013411.png

注:如果在校,DHCP 也有可能解析到 PDNS,最好是手动设置DNS Server.

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