I notice occasional spikes on my server load and when I check access logs I notice a pattern for some automated forum poster that tries to repeatedly access a comment/reply URL. What would be the best way to throttle /ban these for a few minutes / hours? Can CSF for example do sg like this? I am really looking for a quick and dirty solution.
Iptables could be used to that end.
Blocking parallell connections:
Blocking floods (block more than 10 connections per minute) :