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DNS-over-TLS on FritzBox seem to fallback to ISP ones every hour or so

I have a FritzBox 7530 AX and I set DNS over TLS on it. However every one hour or so the DNS seem to fail and it goes back to using the ISP DNS. I live in Italy if that matters.

 The log says: There is no longer a connection to the encrypted DNS servers.
 

18 replies

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    • John_Johnson
    • 2 yrs ago
    • Reported - view

    Moin, mach mal den Haken bei Fallback to public DNS servers when DNS disrupted raus.

      • ace4eme
      • 2 yrs ago
      • Reported - view

      I've already tried and that doesn't fix the problem unfortunately.

      • John_Johnson
      • 2 yrs ago
      • Reported - view

      Mach noch den Haken raus bei Allow fallback to non-encrypted name resolution in the internet.

      • ace4eme
      • 2 yrs ago
      • Reported - view

      I've also tried that. No results...

      • John_Johnson
      • 2 yrs ago
      • Reported - view

      Würdest du auch DoH anstatt DoT nutzen?

      • ace4eme
      • 2 yrs ago
      • Reported - view

      I don't use DoH as I want to set my DNS profile in the router (and I don't see any option in FritzBox to use DoH). By the way I can't speak german, I'm using a translator.

      • John_Johnson
      • 2 yrs ago
      • Reported - view

      Ich muss für Englisch auch einen Übersetzer nutzen.😆

      Hast du das neueste Fritz OS installiert?

      • ace4eme
      • 2 yrs ago
      • Reported - view

      Oh, don't worry hahah. Yes, it is on the latest available firmware.

      • John_Johnson
      • 2 yrs ago
      • Reported - view

      Was ist wenn du DoT in der FRITZ!Box deaktivierst?

      • ace4eme
      • 2 yrs ago
      • Reported - view

      Nothing in particular. It uses ISP's DNS and works normally.

      • ace4eme
      • 2 yrs ago
      • Reported - view

      Also, a little note. Every time the FritzBox fallbacks to the ISP's DNS what I do is disabling DoT and re-enabling it. It goes back to using Next DNS correctly by re-setting it. But then it's a matter of hours and the problem comes again.

      • John_Johnson
      • 2 yrs ago
      • Reported - view

      ace4eme Hast du in deinem Betriebssystem bei IPv4 und IPv6 NextDNS als bevorzugten und alternativen DNS Resolver festgelegt?

      • ace4eme
      • 2 yrs ago
      • Reported - view

      No I haven't. That would be another solution, but I'd like to have them on the router so that every device can benefit from Next DNS

      • John_Johnson
      • 2 yrs ago
      • Reported - view

       Ich würde dir empfehlen diese Einstellungen im Betriebssystem zu setzen. Vielleicht ist das Problem dann ja weg.

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    • Erwin
    • 2 yrs ago
    • Reported - view

    I had similar problems with my Fritzbox7590,
    and fixed it successfully this way: 

      • ace4eme
      • 2 yrs ago
      • Reported - view

      Hi, thanks for sharing your solution. I'll try that. What do the "1" and the "2" do in the URLs?

      • Piero.1
      • 2 wk ago
      • Reported - view

       Hi, unfortunately in my case that solutions doesn't work: I didn't allowed the fallback to a non-encrypted name resolution, so the system coutinues to ask for a non-encrypted resolution and the connection goes down, but when it goes up it connects everytim to the ISP dns. Do you have some alternative idea?

    • gnomedavey
    • 13 days ago
    • Reported - view

    Ciao, arrivo dalla stessa seccatura. Su rete TIM di recente succede anche con altri provider di risoluzione DNS (Cloudflare e Quad9, per esempio). Temporaneamente prova a deselezionare la negoziazione del certificato, tieni disabilitato il fallback.

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