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Domain Name System blocking, or DNS blocking / filtering is a strategy for making it difficult for users to locate specific domains or websites on the Internet. It was first introduced in 1997 as a means to block spam email from known malicious IP addresses. Some public DNS Resolvers, like Quad9 and CleanBrowsing offer filters are part of their DNS. Quad9, for example, blocks access to known phishing and malicious domains. CleanBrowsing filters out adult content in their effort to protect kids online.

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  • حظر بنظام أسماء النطاقات (ar)
  • DNS blocking (en)
  • DNS封鎖 (zh)
rdfs:comment
  • 域名系统封鎖或DNS封鎖/过滤是一种封鎖手段,用户此時难以在互联网上訪問某些域名以及网站。它于1997年首次推出,旨在阻止来自已知恶意IP地址的垃圾電郵。DNS封锁也可以适用于用戶发出的请求,比如DNS不会返回被请求网站的有效IP地址(例如,当在浏览器中输入 "www.wikipedia.org "时,DNS不会返回198.35.26.96)。一些公共 DNS 解析器,如和会阻止用戶訪問已知的网络钓鱼網站和恶意域名網站。 CleanBrowsing還會过滤掉成人網站。 (zh)
  • حظر نظام أسماء النطاقات(DNS)، هي عبارة عن إستراتيجية لجعل من الصعب على المستخدمين الوصول إلى نطاقات أو مواقع إلكترونية على الإنترنت. تم استخدامها سنة 1997 بغرض حجب البريد الإلكتروني غير المرغوب فيه القادم من عنوان آي بي معروف. (ar)
  • Domain Name System blocking, or DNS blocking / filtering is a strategy for making it difficult for users to locate specific domains or websites on the Internet. It was first introduced in 1997 as a means to block spam email from known malicious IP addresses. Some public DNS Resolvers, like Quad9 and CleanBrowsing offer filters are part of their DNS. Quad9, for example, blocks access to known phishing and malicious domains. CleanBrowsing filters out adult content in their effort to protect kids online. (en)
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  • حظر نظام أسماء النطاقات(DNS)، هي عبارة عن إستراتيجية لجعل من الصعب على المستخدمين الوصول إلى نطاقات أو مواقع إلكترونية على الإنترنت. تم استخدامها سنة 1997 بغرض حجب البريد الإلكتروني غير المرغوب فيه القادم من عنوان آي بي معروف. يقوم حظر DNS بفلترة طلبات الوصول للمواقع الإلكترونية. فعند الرغبة في الدخول لموقع ويكيبيديا يقوم نظام أسماء النطاقات عادة بترجمة العنوان الإلكتروني للموقع إلى عنوان الآي بي المطابق له وهو 198.35.26.96 على سبيل المثال إذا تواجد عنوان الآي بي هذا ضمن قائمة الحظر فإن DNS قد يقوم بإضهار رسالة ‘‘عنوان الموقع غير موجود‘‘ أما توجيه المستخدم إلى موقع آخر غير ذلك المطلوب أصلا. فإن العملية آنذاك تسمى (ar)
  • Domain Name System blocking, or DNS blocking / filtering is a strategy for making it difficult for users to locate specific domains or websites on the Internet. It was first introduced in 1997 as a means to block spam email from known malicious IP addresses. DNS blocking can also be applied for outgoing requests as well. Instead of returning the valid IP address of a requested site (for example, instead of 198.35.26.96 being returned by the DNS when "www.wikipedia.org" is entered into a browser, if this IP were on a block list, the DNS might reply that the domain is unknown or with a different IP address that directs to a site with a page stating that the requested domain is not permitted). The latter case where the user is redirected to another destination would be considered DNS Spoofing, otherwise known as "DNS Poisoning". DNS blocking can be applied to individual servers/IP address, or entire blocks of IP addresses for multiple reasons. Some public DNS Resolvers, like Quad9 and CleanBrowsing offer filters are part of their DNS. Quad9, for example, blocks access to known phishing and malicious domains. CleanBrowsing filters out adult content in their effort to protect kids online. (en)
  • 域名系统封鎖或DNS封鎖/过滤是一种封鎖手段,用户此時难以在互联网上訪問某些域名以及网站。它于1997年首次推出,旨在阻止来自已知恶意IP地址的垃圾電郵。DNS封锁也可以适用于用戶发出的请求,比如DNS不会返回被请求网站的有效IP地址(例如,当在浏览器中输入 "www.wikipedia.org "时,DNS不会返回198.35.26.96)。一些公共 DNS 解析器,如和会阻止用戶訪問已知的网络钓鱼網站和恶意域名網站。 CleanBrowsing還會过滤掉成人網站。 (zh)
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