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How to diagnose network issues from Android device

Hi, I'm having huge latency issues (~2 seconds for any resolution) when using NextDNS' DoT on my Android devices, but can't figure out how to properly diagnose it to then report it.

The "Report network latency issue" article only offers a Windows app and Linux script. I've tried running the script on Termux but it requires root, so I can't run it.

The issue doesn't happen when using the unencrypted option. A simple ping doesn't reveal the latency either.

Loading ping.nextdns.io doesn't even mark which server I'm connected to (presumably because it only lists the closer ones and I'm likely connected to some faraway one).

The delay for any resolution when using NexDNS DoT is so big (~2 seconds) it's unmistakable when compared to using Cloudflare's or Google's, which seem instantaneous.

How can I figure out which server I'm connecting to and then report the issue?

Thanks 

4 replies

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    • NextDNs
    • 2 yrs ago
    • Reported - view

    What do you get on https://test.nextdns.io

      • Evenstar
      • 2 yrs ago
      • Reported - view

      NextDNS This is what I get:

      {

       "status": "ok",

       "protocol": "DOT",

       "profile": "fp292a87be58f117b8",

       "client": "redacted",

       "srcIP": "*redacted",

       "destIP": "37.252.238.25",

       "anycast": false,

       "server": "anexia-sao-1",

       "clientName": "unknown-dot",

       "deviceName": "and2",

       "deviceID": "DJTE0"

      }

       

      Connecting to SAO servers actually makes sense.

       

      I ran tests from https://dnscheck.tools/ too and get an average of ~40-45ms latency, which is not bad.

       

      At this point I have no idea what's going on. It's clear as day when browsing that initial loading of any website gets stuck for a couple seconds when using NextDNS, but not other common providers.

      Maybe it's just resolving to really bad servers or there's some timeout/handshake shenanigans going on that don't get picked up on the tests I did. I don't know.

      Yes, I reconnect and reload the browser to force a new resolution when testing. Maybe I could record a video.

      • NextDNs
      • 2 yrs ago
      • Reported - view

      Evenstar could you please traceroute 37.252.238.25 from your device?

      • Jimmy_Taylor
      • 2 yrs ago
      • Reported - view

      NextDNS NextDNS 

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  • 2 yrs agoLast active
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