On my Android device, I'm connected to a wifi router which is connected my home network. I tried setting DNS to 22.214.171.124, 126.96.36.199, and other DNSs. If I ping, say, 188.8.131.52, 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?