Can't use

I can’t use as DNS any more (for two weeks, aprox) from my ISP network [I’m the ISP :slight_smile:]

Traceroute is fine, ping is fine; works; I’ve double-checked everything but can’t find anything in my routing/firewall that would stop DNS requests to-from…

I doubt my upstream ISP (Telekom Serbia) is blocking the request but I don’t know how to check that. [using the backup link, thru another provider, works fine]

Any help for me ?

Dejan J.

It is (or was) not unusual for to be used internally in some networks and on some equipment. There is even a blog post about this.

Do the traceroutes to and look the same length, and do they leave the ISPs network?

You can also visit — the Internet’s Fastest, Privacy-First DNS Resolver and see what the test results look like.

Very strange - traceroute is not the same to and … from cloudflare…/help I can see that I don’t have DNS connectivity to (which I’ve found out already) …

Since it’s probably an error at my ISP (high level, state-owned, telco.) there’s nothing I can do about it, right?

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