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@@ -82,6 +82,24 @@ Encrypted DNS can refer to one of a number of protocols, the most common ones be
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Native implementation of DoH showed up in iOS 14, macOS 11, Microsoft Windows, and Android 13 (however, it won't be enabled [by default](https://android-review.googlesource.com/c/platform/packages/modules/DnsResolver/+/1833144)). General Linux desktop support is waiting on the systemd [implementation](https://github.com/systemd/systemd/issues/8639) so [installing third-party software is still required](../dns.md#encrypted-dns-proxies).
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### Native Operating System Support
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#### Android
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يدعم أندرويد ٩ وما بعده أنظمة أسماء النطاقات عبر أمن طبقة النقل (DNS over TLS). تجد هذا الإعداد في: **الإعدادات** ← ** الشبكة والإنترنت ** ← **نظام أسماء نطاقات خاص**.
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#### Apple Devices
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تدعم آخر إصدارات آيأوإس و آيبادأوإس و تيفيأوإس و ماكأوإس أنظمة DoT و DoH. يوجد دعم أصيل لهذه الموافيق باستخدام [ملفَّات تعريف الضبط](https://support.apple.com/guide/security/configuration-profile-enforcement-secf6fb9f053/web) أو باستخدام [واجهة برمجة إعدادات نظام تسمية النطاقات](https://developer.apple.com/documentation/networkextension/dns_settings).
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لك اختيار ضبط نظام تسمية النطاقات بعد تثبيت ملفِّ تعريف ضبط أو تثبيت تطبيق يستخدم واجهة برمجة إعدادات نظام تسمية النطاقات. إن كانت شبكة خاصَّة افتراضية (VPN) مفعَّلةً فسوف تُحلَّل الاتصالات داخلها باستخدام نظام تسمية نطاقاتها وليس باستخدام إعدادات نظامك.
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لا تتيح أبل واجهةً أصيلةً لإنشاء ملفَّات تعريف معمَّاة. [مُنشئ ملفَّات تعريف نظام تسمية النطاقات الآمن](https://dns.notjakob.com/tool.html) هو أداة غير رسمية تتيح لك إنشاء ملفَّات تعريف نظام تسمية النطاقات معمَّاة، ولكن ضع في حسبانك أنها لن توقَّع. تفضَّل ملفَّات التعريف الموقَّعة على غيرها، وذلك ﻷن التوقيع يؤكِّد أصلها وصحَّتها. تعلَّم ملفَّات التعريف الموقَّعة بعلامة «مؤكَّد» خضراء. لتستزيد علمًا عن توقيع الرموز عليك مطالعة [عن توقيع الرموز](https://developer.apple.com/library/archive/documentation/Security/Conceptual/CodeSigningGuide/Introduction/Introduction.html).
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#### Linux
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`systemd-resolved`, which many Linux distributions use to do their DNS lookups, doesn't yet [support DoH](https://github.com/systemd/systemd/issues/8639). If you want to use DoH, you'll need to install a proxy like [dnscrypt-proxy](https://github.com/DNSCrypt/dnscrypt-proxy) and [configure it](https://wiki.archlinux.org/title/Dnscrypt-proxy) to take all the DNS queries from your system resolver and forward them over HTTPS.
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## What can an outside party see?
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In this example we will record what happens when we make a DoH request:
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@@ -318,4 +336,27 @@ The [EDNS Client Subnet](https://en.wikipedia.org/wiki/EDNS_Client_Subnet) is a
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It's intended to "speed up" delivery of data by giving the client an answer that belongs to a server that is close to them such as a [content delivery network](https://en.wikipedia.org/wiki/Content_delivery_network), which are often used in video streaming and serving JavaScript web apps.
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This feature does come at a privacy cost, as it tells the DNS server some information about the client's location.
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This feature does come at a privacy cost, as it tells the DNS server some information about the client's location, generally your IP network. For example, if your IP address is `198.51.100.32` the DNS provider might share `198.51.100.0/24` with the authoritative server. Some DNS providers anonymize this data by providing another IP address which is approximately near your location.
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If you have `dig` installed you can test whether your DNS provider gives EDNS information out to DNS nameservers with the following command:
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```bash
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dig +nocmd -t txt o-o.myaddr.l.google.com +nocomments +noall +answer +stats
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```
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Note that this command will contact Google for the test, and return your IP as well as EDNS client subnet information. If you want to test another DNS resolver you can specify their IP, to test `9.9.9.11` for example:
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```bash
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dig +nocmd @9.9.9.11 -t txt o-o.myaddr.l.google.com +nocomments +noall +answer +stats
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```
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If the results include a second edns0-client-subnet TXT record (like shown below), then your DNS server is passing along EDNS information. The IP or network shown after is the precise information which was shared with Google by your DNS provider.
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```text
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o-o.myaddr.l.google.com. 60 IN TXT "198.51.100.32"
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o-o.myaddr.l.google.com. 60 IN TXT "edns0-client-subnet 198.51.100.0/24"
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;; Query time: 64 msec
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;; SERVER: 9.9.9.11#53(9.9.9.11)
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;; WHEN: Wed Mar 13 10:23:08 CDT 2024
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;; MSG SIZE rcvd: 130
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```
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