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NextDNS stopped working on all my devices

Since last night, NextDNS has completely stopped working on all my devices, no matter the method I use to access it.

PCs usually use Yoga, which gives the message "drop request because IP address of the server is not yet known".  Using the NextDNS app (beta) doesn't work.

My Android phones are unable to connect.

My base network defaults to using just IP addresses given over DHCP, these don't work.

My internet is fine, if I switch Yoga to use Cloudflare, all resolution happens and is fast.

What are my next steps to diagnose?  Are there any known issues?  This isn't the first time this has happened, it just usually clears faster.

Pro Plan.

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  • Feel free to delete, solved.

    Seems my ISP modem (Virgin Media) had failed in some weird way that allowed some DNS through and not others.  This was stopping Yoga and NextDNS apps from getting their initial lookups which they hand over to the system resolver. I had restarted my entire UniFi system up to the USG and nothing had worked.  Power cycling the modem seems to have cleared it all.  Guessing the Android phones were failing to connect to nextdns even on 5G due to too many attempts whilst on WiFi

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  • Turns out not solved.

    All went down again shortly after.  Now setting USG to use ISP DNS servers makes everything work, but now I can't use NextDNS as default across my network.

    Could it be that there is an issue with the DNS servers for that config?  I have been given 

    45.90.28.151
    45.90.30.151

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    • NextDNS 

      For the first run I returned my router to using NextDNS servers and switched off Yoga. Unsurprisingly, it failed hideously, including the submission so I have included below.

      For the second test, I returned my router to ISP DNS and switched Yoga back on. The results were sent to you with my email address attached: https://nextdns.io/diag/b98f6180-e64b-11ec-9597-afc8ffc9587a

      Testing IPv6 connectivity
        available: false
      Fetching https://test.nextdns.io
        Fetch error: Get "https://test.nextdns.io": dial tcp: lookup test.nextdns.io: no such host
      Fetching PoP name for ultra low latency primary IPv4 (ipv4.dns1.nextdns.io)
      Fetch error: Get "https://dns.nextdns.io/info": dial tcp: lookup ipv4.dns1.nextdns.io: no such host
      Fetching PoP name for ultra low latency secondary IPv4 (ipv4.dns2.nextdns.io)
      Fetch error: Get "https://dns.nextdns.io/info": dial tcp: lookup ipv4.dns2.nextdns.io: no such host
      Fetching PoP name for anycast primary IPv4 (45.90.28.0)
      Fetch error: Get "https://dns.nextdns.io/info": dial tcp 45.90.28.0:443: connectex: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond.
      Fetching PoP name for anycast secondary IPv4 (45.90.30.0)
      Fetch error: Get "https://dns.nextdns.io/info": dial tcp 45.90.30.0:443: connectex: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond.
      Pinging PoPs
        error: Get "https://router.nextdns.io/?limit=10&stack=dual": dial tcp: lookup router.nextdns.io: no such host
        Traceroute error: lookup ipv4.dns1.nextdns.io: no such host
        Traceroute error: lookup ipv4.dns2.nextdns.io: no such host
      Traceroute for anycast primary IPv4 (45.90.28.0)
          1    192.168.1.1    3ms   2ms   1ms
          2                   *     *     *
          3      80.7.14.1    8ms   9ms  10ms
          4                   *     *     *
          5 62.253.175.130   11ms  15ms  20ms
          6     62.252.5.1   10ms  11ms  12ms
          7   5.226.136.10   20ms  11ms  10ms
          8   45.11.107.74   13ms  13ms  14ms
          9   45.142.244.4   20ms  11ms  10ms
         10                   *     *     *
         11                   *     *     *
         12                   *     *     *
         13                   *     *     *
         14                   *     *     *
         15                   *     *     *
         16                   *     *     *
         17                   *     *     *
         18                   *     *     *
         19                   *     *     *
         20                   *     *     *
         21                   *     *     *
         22                   *     *     *
         23                   *     *     *
         24                   *     *     *
         25                   *     *     *
         26                   *     *     *
         27                   *     *     *
         28                   *     *     *
         29                   *     *     *
         30                   *     *     *
      Traceroute for anycast secondary IPv4 (45.90.30.0)
          1    192.168.1.1    1ms   1ms   2ms
          2                   *     *     *
          3      80.7.14.1    9ms  12ms   9ms
          4                   *     *     *
          5                   *     *     *
          6  62.254.42.174   14ms  18ms  13ms
          7 213.46.174.118   22ms  14ms  11ms
          8 62.115.120.238   13ms  15ms  10ms
          9  62.115.121.29   15ms  11ms  11ms
         10  80.239.175.18   12ms  11ms  12ms
         11                   *     *     *
         12                   *     *     *
         13                   *     *     *
         14                   *     *     *
         15                   *     *     *
         16                   *     *     *
         17                   *     *     *
         18                   *     *     *
         19                   *     *     *
         20                   *     *     *
         21                   *     *     *
         22                   *     *     *
         23                   *     *     *
         24                   *     *     *
         25                   *     *     *
         26                   *     *     *
         27                   *     *     *
         28                   *     *     *
         29                   *     *     *
         30                   *     *     *
      Do you want to send this report? [Y/n]: y
      Optional email in case we need additional info: my@email.com
      Post unsuccessful: Post "https://api.nextdns.io/diagnostic": dial tcp: lookup api.nextdns.io: no such host
      Please report this issue on https://github.com/nextdns/diag
      
      [process exited with code 1 (0x00000001)]
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    • Richard Benson are you still experiencing this issue?

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    • NextDNS

      Confirmed it is still an issue. Set my network to use NextDNS, restarted laptop and Yoga back to the same error messages as before.

      I am fairly confident it's an issue with my ISP, but I don't know what.

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    • Richard Benson we can't find what the issue is. We can trace your IP back with no issue from the different network paths. 

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