NextDNS - stops for some time then comes back

Armin_Felkel
3 mths ago
22replies

Hi All,

its the second time now since December last year so i thought to reach out to get some other ideas and suggestions.

Scenario:
NextDNS configured on my SonicWall Tz270 and works fine.

Suddenly DNS resolution stops
Internet (test via IP) works fine
Switching to DNS 1.1.1.1 brings back the internet DNS resolution.

Then wait for about an hour (+/-).
Reconfigure back to nextDNS IP as DNS.
Starts working again...

Dont have a superfancy setup just the usual suspects set in Add Blocking and nearly all options in Security.
Allowlists for Chat, gaming and o365.

The interesting part is that as soon as i switch to 1.1.1.1 DNS is instantly starts working.
Premium edition should not have any request limitation as far i know.
Not quite sure if there is a "ban" happing in between which releases after a while.
As of now all started working like before.

Did you observer anything like it as well?
Any hints or suggestions?

thank you very much!
Armin

- Ryan_Wingerter
- 3 mths ago
- Reported - view
I had the same thing happen. DNS resolution stopped at 10:30 last night (according to the logs). After switching to 8.8.8.8, the DNS resolution starts again. I have not tried to switch back as we need the internet working for now.

When I go to http://ping.nextdns.io, I do have errors.
- NextDNs
- 3 mths ago
- Reported - view
Please provide a https://nextdns.io/diag
- Ryan_Wingerter
  
  3 mths ago
  
  Reported - view
  Report has been sent.
- NextDNs
  
  3 mths ago
  
  Reported - view
  I need the link
- Ryan_Wingerter
  
  3 mths ago
  
  Reported - view
  I don't show a link. After running the program, I get the folowing
  
  Do you want to send this report? [Y/n]: y
  Optional email in case we need additional info:
  Post unsuccessful: status 400
  {"error":"0: instance.Test requires property \"Client\"\n"}
- Armin_Felkel
  
  3 mths ago
  
  Reported - view
  - any news?
- NextDNs
  
  3 mths ago
  
  Reported - view
  we don't have a list of IPs for all our PoPs. Blocking all ICMP does not make much sense IMHO. It will make any network debugging pretty difficult and break a few things like PMTU discovery along the way.
- Armin_Felkel
  
  3 mths ago
  
  Reported - view
  let me see what i can do for testing.
- Armin_Felkel
  
  3 mths ago
  
  Reported - view
  report generated and send: https://nextdns.io/diag/e43bd9c0-bc2a-11ee-8b17-419cd05b84fc
  These seem to be my closest PoPs.
  45.90.28.0 zepto-zrh
  45.90.30.0 anexia-zrh
  i could may create an ICMP group on the firewall
- Armin_Felkel
  
  2 mths ago
  
  Reported - view
  Any idea how this "block/ban" could happen? It does stop for around and hour then works fine again.
  Did the report shows something out of the ordinary?
- Armin_Felkel
  
  2 mths ago
  
  Reported - view
  Any update on the case?
- NextDNs
  
  2 mths ago
  
  Reported - view
  we couldn’t find anything abnormal. Please provide another diag when the problem arises.
- Armin_Felkel
- 3 mths ago
- Reported - view
I dont get much out of the report.
traceroute towards the web is not allowed on firewall.

nextDNS
- NextDNs
  
  3 mths ago
  
  Reported - view
  please run the diag from a client on the same lan
- Armin_Felkel
  
  3 mths ago
  
  Reported - view
  there you go: https://nextdns.io/diag/3c013800-b6b6-11ee-9dea-f18fc6c687fa
  But as i wrote. ICMP traceroute does not work as the firewall will not let it pass.
- Armin_Felkel
  
  3 mths ago
  
  Reported - view
  Any news on the case?
  thanks
- NextDNs
  
  3 mths ago
  
  Reported - view
  if you can disable ICMP filtering to get visibility, it would be interesting to run this diag again next time it fails.
- Armin_Felkel
  
  3 mths ago
  
  Reported - view
  Are your pop IPs somewhere visible? ICMP to all Internet is just not state of the art... Any other tests which could be run? I mean icmp does not provide you much measurement would it?
- Armin_Felkel
- 3 mths ago
- Reported - view
Ping looks good as well. Connected to my nearest pop.

  anexia-zrh    17 ms  (anycast2, ultralow2)

■ zepto-zrh     18 ms  (anycast1, ultralow1)

  zepto-fra     22 ms

  anexia-fra    24 ms

  hetzner-nue   26 ms

  vultr-fra     26 ms

  zepto-mil     27 ms

  anexia-lux    32 ms

  anexia-mil    46 ms

  anexia-par   113 ms
- john.28
- 3 mths ago
- Reported - view
Same issue went in and out last night at 10:30PM Eastern Time ( I thought is was a WI-FI ap issues). Woke up 6:00 AM and all my wifi devices were offline. Then I couldn't get out from my PC on wired LAN. After that I turned on my VPN to bypass nextdns. After that dns started revolving again from my vpn and could access websites via the browser again. I then change my router to Cloudflare 1.1.1.1 and all off my wifi devices started working again. Defiantly something going on. A status page would be nice. Yes I know about the ping page.
- Armin_Felkel
- 3 mths ago
- Reported - view
Do you guys turned on these perfomance settings?
This was the last change it did...
- Armin_Felkel
- 3 mths ago
- Reported - view
@Suppport / @NextDNS

do you have any update or suggestion?

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NextDNS - stops for some time then comes back

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