"Here is an explanation of what this configuration file will do
:
"If an IP made 250 NEW connections in 1 hour time it will send
an email to admin@example.com. The same happend after 400
connections. After 500 new connections in 1h period, PSAD will
block the IP for the next 12 hours. Of course you can ajust that to
your needs... Remember that we only log IP that made at least 5
connection in the last 5 seconds so it's improbable to block a
legitimate user... 'Packets' are not real packets, they are simply
the number of time the IP appears in /var/log/syslog."