I used to use a linux software that monitors logs like http, ssh, etc and if it detects that someone is trying to use brute force, it blocks that ip by adding a rule to iptables. I forgot what that software is called. It's opensource and free.
fail2ban does that, although I don't think it's the only such tool. (Amazed mentioned DenyHosts, although it seems to be SSH specific.)
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5 years ago