DNS over HTTPS fails when network.trr.mode is 3

Discussion of bugs in Mozilla Firefox
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kerft
Posts: 585
Joined: January 30th, 2019, 9:38 am

DNS over HTTPS fails when network.trr.mode is 3

Post by kerft »

I heard that DNS over HTTPS will soon be the default for many. In version Firefox 69 I tried it, checking the box under general, networking. On https://www.cloudflare.com/ssl/encrypted-sni/ it works but warns you do not have DNSSEC, and suggests you change the default for network.trr.mode from 2 to 3 which means force DNS over HTTPS with no fallback. When I set network.trr.mode to 3, no web pages load. I increased network.trr.request-timeout but that did not work.

Is there already a bugzilla report filed?
Brummelchen
Posts: 4480
Joined: March 19th, 2005, 10:51 am

Re: DNS over HTTPS fails when network.trr.mode is 3

Post by Brummelchen »

which DoH server is set?
firefox 70 - trr mode on 3 means anything = dead, no connection. (default settings)
trr default is 0 here. at least i wont chose CF. there are better.
kerft
Posts: 585
Joined: January 30th, 2019, 9:38 am

Re: DNS over HTTPS fails when network.trr.mode is 3

Post by kerft »

This is with "Cloudflare (default)" as the provider from the list in general, network settings, settings. https://blog.mozilla.org/futurereleases ... e-default/ this says in late September a small percent of US users will have DoH enabled as a test.
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