搜尋 Mozilla 技術支援網站

防止技術支援詐騙。我們絕對不會要求您撥打電話或發送簡訊,或是提供個人資訊。請用「回報濫用」功能回報可疑的行為。

了解更多

Problem Accessing Constant Contact

  • 8 回覆
  • 1 有這個問題
  • 6 次檢視
  • 最近回覆由 Jim

more options

My community association uses Constant Contact for its documents, notices, etc. When I get an email message from them, it often contains several links beginning with https://r20.rs6.net. When I try to access one of those links, Firefox tells me "Hmm. We’re having trouble finding that site. We can’t connect to the server at r20.rs6.net." Chrome and Edge do not give the same error - they can access the requested page. Is there some setting in Firefox that I need to change to fix this problem? Firefox has been my default browser for years, but I also like to read notices from my community association.

My community association uses Constant Contact for its documents, notices, etc. When I get an email message from them, it often contains several links beginning with https://r20.rs6.net. When I try to access one of those links, Firefox tells me "Hmm. We’re having trouble finding that site. We can’t connect to the server at r20.rs6.net." Chrome and Edge do not give the same error - they can access the requested page. Is there some setting in Firefox that I need to change to fix this problem? Firefox has been my default browser for years, but I also like to read notices from my community association.

被選擇的解決方法

Try changing secure DNS over HTTPS (DoH) to "Max Protection" and also try a different provider (NextDNS/Cloudflare).

從原來的回覆中察看解決方案 👍 1

所有回覆 (8)

more options

When I try your first link, uBlock Origin blocks it because of one of its filter lists. Do you have that extension or a similar content blocker?

You could try troubleshoot mode.

https://support.mozilla.org/en-US/kb/diagnose-firefox-issues-using-troubleshoot-mode https://support.mozilla.org/en-US/kb/troubleshoot-extensions-themes-to-fix-problems (also deals with hardware acceleration) https://support.mozilla.org/en-US/kb/troubleshoot-issues-related-to-add-ons

more options

The about:url-classifier page shows this URL as part of the content-email-track-digest256 table, so this URL looks related to email services.

URI: https://r20.rs6.net/
List of tables: content-email-track-digest256
more options

It works for me:

Try changing DNS over HTTPS from "Default Protection" to "Off" (or vice versa) and in Connection Settings change "Use system proxy settings" to "No proxy".

more options

Sorry for the long delay in replying. I got sidetracked with some other projects. The problem still exists in troubleshooting mode. Also with DNS over HTTPS changed from "Default Protection" to "Off" and Connection Settings changed from "Use system proxy settings" to "No proxy". Any other suggestions?

more options

What does the DNS Lookup tool on the about:networking page show ?

more options

Is this what you are asking for?

more options

選擇的解決方法

Try changing secure DNS over HTTPS (DoH) to "Max Protection" and also try a different provider (NextDNS/Cloudflare).

more options

Aha! The "Max Protection" setting did the trick. NextDNS/Cloudflare was the suggested provider after I selected "Max Protection" and I left it that way.