Hi everyone. I woke up today to find that my server wasn't responding! :shock: So I contacted support, and true to form, they resolved the issue very quickly. Support said:

You may want to consider clearing some of the older entries from APF's lists.

So, could someone explain how to do that? I notice that there is a "flush" option:
-f|--flush|--stop ...... flush firewall
Of course it doesn't explain what that DOES

Or should I just forget about APF and use KISS instead? Which is better?

Thanks everyone!

Been using apf for years..
Love it.

apf -r
is the same as iptables -F

that flushes the tables, and reloads your rules.
The -f --stop does just that, flushes the tables and stops apf. So now you have no rules running.

You can get the latest version from here
http://rfxnetworks.com/apf.php
if using apf, get bfd which ties into apf to do your auto ip banning.