DNS intermittent timeout

Website, Application, Performance DNS & Network
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What is the name of the domain?

1.1.1.1

What is the error message?

Partially Re-routed

What is the issue you’re encountering

I use 1.1.1.1 as my primary dns, the server seems to be timing out a lot and when i checked the status page seems Dhaka,Bangladesh server is showing Partially Re-routed. Seems like the possible cause.

What feature, service or problem is this related to?

DNS not responding/updating

What are the steps to reproduce the issue?

pinging 1.1.1.1 shows huge timeout. I’ve also checked against google’s DNS 8.8.8.8 that seems to have no packet loss. Providing an uptime chart from my monitoring tool as attachment.

Screenshot of the error

Screenshot 2024-08-22 014509.png
Screenshot 2024-08-22 014509.png1125×289 39.5 KB

2

It should still be fully operational, although it could explain a bit of raised latency (e.g. if your ISP takes you to another country or even continent).

I believe the mention of Bangladesh means that you’re seeing the issue from there?

→

What ISP / provider, preferably their AS number?

The AS number can be found here:

Ping could theoretically be on 100% timeout when pinging, where DNS traffic would still work just fine, as they are two different types of traffic.

I’m therefore wondering, are you actually running any DNS queries, that are causing any issues, … and if so, which exact ones?

Can you share the output of these commands, which will show which facility you’re being routed to?

  1. dig +nsid CHAOS TXT id.server @1.1.1.1 | egrep "(NSID:|EDE:|^id.server)"

  2. dig +nsid CHAOS TXT id.server @1.0.0.1 | egrep "(NSID:|EDE:|^id.server)"

Alternatively, if you run an operating system, without “dig”:

  1. nslookup -class=CHAOS -type=TXT id.server 1.1.1.1

  2. nslookup -class=CHAOS -type=TXT id.server 1.0.0.1

2 Likes
3

I believe the mention of Bangladesh means that you’re seeing the issue from there?
That’s correct

What ISP / provider, preferably their AS number?
AS Number 23688

Can you share the output of these commands, which will show which facility you’re being routed to?

  1. dig +nsid CHAOS TXT id.server @1.1.1.1 | egrep "(NSID:|EDE:|^id.server)"
  2. dig +nsid CHAOS TXT id.server @1.0.0.1 | egrep "(NSID:|EDE:|^id.server)"
  1. ; NSID: 35 32 39 6d 31 31 (“529m11”)
    id.server. 0 CH TXT “DAC”
  2. ;; communications error to 1.0.0.1#53: timed out
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The IATA code DAC means that you are reaching the Dhaka, Bangladesh facility, when using 1.1.1.1.

The timeout that you see for 1.0.0.1 may however be the culprit for the problem you’re seeing with intermittent timeout.

Can you run a traceroute to 1.1.1.1 and 1.0.0.1, and post their output?

As a side question, -

Do you have IPv6 connectivity with your ISP?

In other words, are you able to reach the following two addresses?

→ https://[2606:4700:4700:0:0:0:0:1111]/cdn-cgi/trace
→ https://[2606:4700:4700:0:0:0:0:1001]/cdn-cgi/trace

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