

Seems knot-dns has DNSSEC turned on per default. But what’s all the IP addresses in the config for, if not to offer recursive lookup? That enables an amplification attack. I think they’ll do lookups to put strain on other servers, not necessarily your zones.







Thanks! Learned something today. Last time I opened port 53 to the public it didn’t take long and I was sending out several Megabits per second in DNS traffic. Constantly. Mostly querying the same few things. But I guess I had it the wrong way round and that wasn’t the target. Or I’ve seen a different attack type… Guess I can now try again with the new knowledge.