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Horrible DNS latencies since yesterday - family is not happy.

Hi Team:  Long time NextDNS user with ASUS Merlin router.   NO changes on router and I do a manual setup using stubby.yml which has not changed.

Starting yesterday, DNS latencies went horrible and barely resolve.  Normally, boom and all in the low 20ms.  Family is screaming about how horrible DNS is.  What's going on? 

Oh I already tried to DL the "diag" script and 2+ antiviral / malware programs wiped it out immediately without even opening it.   So I doubt that's going to get passed those scanners. 

Also, I've already rebooted the router and checked my stubby.yml file for any changes.  

ping.nextdns.io yields (multiple times) I might get 1 to resolve to 25-50 ms if lucky.

 hydron-clt                error

  tier-clt                  error

  anexia-mnz                error

  zepto-xrs                 error

  zepto-iad                 error

  wlvrz-was                 error

  teraswitch-pit            error

  router-pit                error

  anexia-atl                error

  vultr-atl                 error

anycast.dns1.nextdns.io error (anycast1)

anycast.dns2.nextdns.io error (anycast2)

dns1.nextdns.io error (ultralow1)

dns2.nextdns.io error (ultralow2)

58 replies

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    • Vitor
    • 3 yrs ago
    • Reported - view

    https://nextdns.io/diag/36509650-aa87-11eb-960d-33c14b839c06 

    Do you think that if I enable ipv6, I will increase the speed?
      • Pro subscriber ✓
      • DynamicNotSlow
      • 3 yrs ago
      • Reported - view

      Vitor you should definitely enable IPv6

      • Vitor
      • 3 yrs ago
      • Reported - view

      DynamicNotSlow could you please explain why? :)

      • Pro subscriber ✓
      • DynamicNotSlow
      • 3 yrs ago
      • Reported - view

      Vitor better compatibility and common sense as IPv6 is current one. v4 is outdated

      • olivier
      • 3 yrs ago
      • Reported - view

      DynamicNotSlow if only… IPv6 can improve or degrade your latency, it depends on many variables. Many ISPs won't monitor their IPv6 as well as their IPv4 network, so you can expect worst performance on IPv6 more often than not.

      Think of IPv6 as an alternate (somewhat partial) internet. You may think it would give you the best of both but it's more complex than that. There is a great write-up on the matter by Avery Pennarun from tailscale: https://tailscale.com/blog/two-internets-both-flakey/

      Note that I support IPv6 development and I do not advise not to enable it. But believing IPv6 will fix your latency issues is a sweet dream :)

      Back to Victor question, based on your diag, Fortaleza PoP gives 28ms in the top and 66ms in the traceroute, which could be due to a difference of measurement between TCP  (top) and ICMP (traceroute) or an unstable route. You can repeat the diag several time to see if those results are stable. From the traceroute, rio looks like a better choice for you. I'll check why secondary is not getting to rio too.

      If you want to take your chance with Fortaleza, try using DoT or DoH instead of UDP in order to switch to ultralow.

      • Vitor
      • 3 yrs ago
      • Reported - view

      Olivier Poitrey Thanks, how i can use DOT on windows? Only with the APP?

      • Chris_Leidich
      • 3 yrs ago
      • Reported - view

      Vitor DOT is now supported in the latest version of YogaDNS. You can use DOH via YogaDNS as well, so it's a nice app if you want to try both protocols.

      • Ruby_Balloon
      • 3 yrs ago
      • Reported - view

      Vitor Fyi, The Windows app only uses DoH

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