PF-and-Fail2ban-on-FreeBSD

PF-and-Fail2ban-on-FreeBSD.md

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+With the firewall configured, it was time to set up Fail2ban. It can be installed from pkg, along with pyinotify for kqueue support.
+
+~~~
+pkg install py37-fail2ban-0.11.1_2
+pkg install py37-pyinotify-0.9.6
+~~~
+
+The default configuration is in /usr/local/etc/fail2ban/jail.conf, and overrides should be put in jail.local. First I needed to tell Fail2ban to use PF.
+
+~~~
+[DEFAULT]
+banaction = pf
+~~~
+
+his refers to the file /usr/local/etc/fail2ban/action.d/pf.conf, which adds banned IP addresses to a PF table called fail2ban. This on its own doesn’t do anything but register the address with PF, so I needed to add a rule to pf.conf to block the traffic.
+
+~~~
+table <fail2ban> persist
+block in quick from <fail2ban>
+~~~
+
+I added this rule directly below block in all so that it took precedence over my ICMP rules.
+
+Back to Fail2ban, I enabled the SSH jail, which watches for failed logins in /var/log/auth.log.
+
+~~~
+[sshd]
+enabled = true
+~~~
+
+Then I reloaded the PF configuration and started Fail2ban.
+
+~~~
+service pf reload
+echo 'fail2ban_enable="YES"' >> /etc/rc.conf
+service fail2ban start
+~~~
+
+To see it in action, I can tail the Fail2ban log, list the addresses in the fail2ban table, and inspect the statistics for my PF rules.
+
+~~~
+tail /var/log/fail2ban.log
+pfctl -t fail2ban -T show
+pfctl -v -s rules
+~~~
+
+My final jail.local looks like this:
+
+~~~
+[DEFAULT]
+bantime = 86400
+findtime = 3600
+maxretry = 3
+banaction = pf
+
+[sshd]
+enabled = true
+~~~
+
+
+https://www.sqlpac.com/fr/documents/linux-ubuntu-fail2ban-installation-configuration-iptables.html
+https://cmcenroe.me/2016/06/04/freebsd-pf-fail2ban.html