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No connectivity when NextDNS is set as Tailscale DNS

Hello,

For the past hours, I've had a complete loss of connectivity when connected to Tailscale with NextDNS set as Global Nameserver + "Override local DNS" option.

There was no change of configuration on my part. DNS requests all time out.

Yet, if I set Tailscale's DNS to any of the other default providers -- Quad9 for example--, Tailscale works as expected, no loss of connectivity. 

My Tailnet's ACL is in its default state.

I'm seeing this behaviour on Android and Linux devices over two different fibre connections and mobile networks, in two different cities, with different ISPs.

10 replies

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    • Yarn_Pusher
    • 1 yr agoWed, December 13, 2023 at 2:20 PM UTC
    • Reported - view

    I can confirm that we have been suffering from the exact same issue starting around 9:30 am this morning.

    • NextDNs
    • 1 yr agoWed, December 13, 2023 at 3:54 PM UTC
    • Reported - view

    Can you please return  the output of:

    curl -v https://dns.nextdns.io

    A https://nextdns.io/diag may also be useful.

    • Gradient
    • 1 yr agoWed, December 13, 2023 at 5:09 PM UTC
    • Reported - view

    • NextDNs
    • 1 yr agoWed, December 13, 2023 at 11:39 PM UTC
    • Reported - view

    Do you still have the issue?

    • Gradient
    • 1 yr agoThu, December 14, 2023 at 7:49 AM UTC
    • Reported - view

    No, it's working again.

    • Yarn_Pusher
    • 1 yr agoFri, December 15, 2023 at 11:45 AM UTC
    • Reported - view

    @NextDNS Could you please elaborate if you found any issues, and if so, did you fix something to resolve the issue?

    We need an explanation and whether you have done something to ensure this issue will not happen again.

    If not we will most likely use another service.

     said:

    NextDNSStaff

    NextDNs

    yesterdayThu, 14 December 2023 at 00:39 CET

    Reported - view

    Do you still have the issue?
    • Cryo
    • 1 yr agoTue, January 16, 2024 at 1:25 PM UTC
    • Reported - view

     I am experiencing a similar issue, but it is on a single device.

    If I have NextDNS set up as my only DNS provider on Tailscale and I turn on 'Override local DNS,' my laptop cannot resolve DNS queries. It works again if I replace NextDNS with Cloudflare on any other DNS provider in Tailscale. Setting --accept-dns=false also solves the issue, but I cannot use Tailscale's Magic DNS feature anymore...

    Regarding my setup, I am using a NixOS machine, and I have also configured NextDNS on my Unifi machine (the simple IPv4 with a DDNS entry for my home IP to be resolved).

    • Bastiaan
    • 10 days agoSat, January 11, 2025 at 7:27 PM UTC
    • Reported - view

    I have got the exact same issue since a couple of hours today on multiple hosts in my network using Tailscale + nextdns

      • Bastiaan
      • 8 days agoTue, January 14, 2025 at 4:01 PM UTC
      • Reported - view

       I think my issue is different, I will create separate topic for it.

Content aside

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  • 8 days agoTue, January 14, 2025 at 4:01 PM UTCLast active
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