Add fail2ban action definition

debian/fail2ban/firewall-ipset.conf

+[Definition]
+
+actionban = ipset add <ipmset> <ip> timeout <ipsettime> -exist
+actionunban = ipset del <ipmset> <ip> -exist
+
+[Init]
+
+ipmset = f2b_ip
+ipsettime = 0
+
+[Init?family=inet6]
+
+ipmset = f2b_ip6

debian/firewall.install

+debian/fail2ban/firewall-ipset.conf etc/fail2ban/action.d