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On my Android device, I'm connected to a wifi router which is connected my home network. I tried setting DNS to 8.8.8.8, 1.1.1.1, and other DNSs. If I ping, say, 8.8.4.4, the connection works.

Whatsapp, which seems to be using fixed IP addresses, and doesn't consult DNS, works fine.

But, if in Firefox, I try to any domain name, it doesn't resolve. Neither does any ping to a domain name.

I'm monitoring traffic on the local network with Wireshark to see if any DNS requests come from the phone - no luck...

Anyone has a suggestion how to proceed?

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  • Are you only looking for UDP DNS traffic or also for DNS over TLS or HTTPS? Android uses such techniques if private DNS is active and as far as I remember Firefox uses it's own DNS resolver settings.
    – Robert
    Jan 13 at 21:01
  • I have Wireshark monitor all packets. I see, of course the normal TCP and UDP packets, but also ICMP (such as the pings) and others. As other PCs are on the local net, I also see DNS requests from those machines.
    – jcoppens
    Jan 13 at 21:16
  • "I tried setting DNS to 8.8.8.8, 1.1.1.1, and other DNSs". How did you do that? Jan 13 at 22:36
  • @IrfanLatif. Something like: gadgets.ndtv.com/mobiles/features/…
    – jcoppens
    Jan 14 at 0:50
  • You need to do the normal DNS troubleshooting steps. dig is a good companion. Some in-depth details, may help in troubleshooting: here, here and here. Jan 14 at 1:45

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