X
Nhấn vào đây để đến phiên bản di động của trang web.

Diễn đàn trợ giúp

DNS over HTTPS and hosts file usage

Được đăng

How does DNS over HTTPS modes define usage of hosts file?

Firefox: 69.0, OS: Ubuntu 18.04.3

I noticed that when I enable DNS over HTTPS ("network.trr.mode" set to 2 - use DoH, fall back to DNS), *and* hostname is defined in hosts file (/etc/hosts), Firefox usage of hosts file is inconsistent and hard to predict.

If IPs defined in hosts file and obtained via DNS request differ, corresponding site/resources behaves erratically, as if Firefox chooses at random, which page components' DNS address should be resolved via hosts, and which via DoH.

I had to disable DoH for that reason.

It is possible to set up DoH, so that it used hosts records, if present, and used DNS in all other cases?

How does DNS over HTTPS modes define usage of hosts file? Firefox: 69.0, OS: Ubuntu 18.04.3 I noticed that when I enable DNS over HTTPS ("network.trr.mode" set to 2 - use DoH, fall back to DNS), *and* hostname is defined in hosts file (/etc/hosts), Firefox usage of hosts file is inconsistent and hard to predict. If IPs defined in hosts file and obtained via DNS request differ, corresponding site/resources behaves erratically, as if Firefox chooses at random, which page components' DNS address should be resolved via hosts, and which via DoH. I had to disable DoH for that reason. It is possible to set up DoH, so that it used hosts records, if present, and used DNS in all other cases?
Trích dẫn

Chi tiết hệ thống bổ sung

Phần bổ trợ đã cài đặt

OpenH264 Video Codec provided by Cisco Systems, Inc.

Ứng dụng

  • Chuỗi đại diện người dùng: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Firefox/68.0

Thông tin chi tiết

jscher2000
  • Top 10 Contributor
8690 giải pháp 71037 câu trả lời
Được đăng

It's puzzling that you get inconsistent results. Could it be due to cached DNS resolutions? Because otherwise it sounds as though Firefox is using the race mode (mode 1) instead of the fallback mode (mode 2):

  • 0 - local only, DoH off by default (current setting)
  • 1 - query DoH and local, use first available
  • 2 - query DoH first, fallback to local (checkbox in options)
  • 3 - query DoH only, do not use local (most private?)
  • 4 - use local but test DoH performance (temporary??)
  • 5 - local only, DoH off by user choice (won't be overridden??)

From: https://daniel.haxx.se/blog/2018/06/03/inside-firefoxs-doh-engine/

As far as I know, what you want is not an option, but I'm relying on the older definitions from the above blog post.

It's puzzling that you get inconsistent results. Could it be due to cached DNS resolutions? Because otherwise it sounds as though Firefox is using the race mode (mode 1) instead of the fallback mode (mode 2): * '''0''' - local only, DoH off by default (current setting) * '''1''' - query DoH ''and'' local, use first available * '''2''' - query DoH first, fallback to local ''(checkbox in options)'' * '''3''' - query DoH only, do not use local (most private?) * '''4''' - use local but test DoH performance (temporary??) * '''5''' - local only, DoH off by user choice (won't be overridden??) From: https://daniel.haxx.se/blog/2018/06/03/inside-firefoxs-doh-engine/ As far as I know, what you want is not an option, but I'm relying on the older definitions from the above blog post.
Bài viết này có hữu ích với bạn không?
Trích dẫn

Người tạo câu hỏi

I will try with

network.dnsCacheExpiration

set to 0 (if I understand your question correctly).

Pity the hosts file isn't taken into account as separate resolution means. In my case, when I need hosts-based IPs in certain circumstances, that means I should use a separate browser.

I will try with network.dnsCacheExpiration set to 0 (if I understand your question correctly). Pity the hosts file isn't taken into account as separate resolution means. In my case, when I need hosts-based IPs in certain circumstances, that means I should use a separate browser.
Bài viết này có hữu ích với bạn không?
Trích dẫn
Đặt một câu hỏi

Bạn phải đăng nhập vào tài khoản của bạn để trả lời bài viết. Vui lòng bắt đầu một câu hỏi mới, nếu bạn chưa có tài khoản.