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posted by Fnord666 on Monday July 08 2019, @10:23AM   Printer-friendly
from the Homer-Simpson-Approved dept.

How to Enable DNS-Over-HTTPS (DoH) in Firefox:

The DNS-over-HTTPS [(Doh)] protocol works by taking a domain name that a user has typed in their browser and sending a query to a DNS server to learn the numerical IP address of the web server that hosts that specific site.

This is how normal DNS works, too. However, DoH takes the DNS query and sends it to a DoH-compatible DNS server (resolver) via an encrypted HTTPS connection on port 443, rather than plaintext on port 53.

This way, DoH hides DNS queries inside regular HTTPS traffic, so third-party observers won't be able to sniff traffic and tell what DNS queries users have run and infer what websites they are about to access.

Further, a secondary feature of DNS-over-HTTPS is that the protocol works at the app level. Apps can come with internally hardcoded lists of DoH-compatible DNS resolvers where they can send DoH queries.

This mode of operation bypasses the default DNS settings that exist at the OS level, which, in most cases are the ones set by local internet service providers (ISPs).

This also means that apps that support DoH can effectively bypass local ISPs traffic filters and access content that may be blocked by a local telco or local government -- and a reason why DoH is currently hailed as a boon for users' privacy and security.

[...] The below step-by-step guide will show Firefox users in the UK and Firefox users all over the world how to enable the feature right now, and not wait until Mozilla enables it later down the road -- if it will ever do. There are two methods of enabling DoH support in Firefox.

The fine article then presents step-by-step instructions on two methods to enable DoH in Firefox, as well as an explanation of what the various setting values mean.


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  • (Score: 1, Interesting) by Anonymous Coward on Monday July 08 2019, @12:25PM

    by Anonymous Coward on Monday July 08 2019, @12:25PM (#864433)

    Lots of apps have already started hard coding the DNS servers they use. Google in particular is bad about this... it keeps you from ad filtering via something like a pi-hole and it lets them know every site you're looking at. You can fix that on your router, only given you know how and that you have access to it.
    If this takes off they could just serve the requests from the same IPs as search and you won't be able to block it.

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