2007-09-16 I kept seeing things in the logs like Se ... 11 years ago
I kept seeing things in the logs like Sep 16 05:52:39 gosper named: denied query from [188.8.131.52].22632 for "www.capitalone.com" A/IN, all from 184.108.40.206, 220.127.116.11, 18.104.22.168 without any explanation to be found on the web. The name guesses some sort of study of DNS answers, and all queries seem to be for phishing targets, but several thousand answers "your query was denied" doesn't make them stop asking. Solution: iptables -t filter -I INPUT 8 -j REJECT --source 22.214.171.124/24 --protocol udp --dport 53 --reject-with icmp-admin-prohibited. Mail to noc@ was never answered.