Added fail2ban, though not sure its configured correctly yet

docker/rootfs/fail2ban/action.d/shorewall-ipset-proto6.conf

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+## Version 2022/08/06
+# Fail2Ban configuration file
+#
+# Author: Eduardo Diaz
+#
+# This is for ipset protocol 6 (and hopefully later) (ipset v6.14).
+# for shorewall
+#
+# Use this setting in jail.conf to modify use this action instead of a
+# default one
+#
+# banaction   = shorewall-ipset-proto6
+#
+# This requires the program ipset which is normally in package called ipset.
+#
+# IPset was a feature introduced in the linux kernel 2.6.39 and 3.0.0
+# kernels, and you need Shorewall >= 4.5.5 to use this action.
+#
+# The default Shorewall configuration is with "BLACKLISTNEWONLY=Yes" (see
+# file /etc/shorewall/shorewall.conf). This means that when Fail2ban adds a
+# new shorewall rule to ban an IP address, that rule will affect only new
+# connections. So if the attacker goes on trying using the same connection
+# he could even log in. In order to get the same behavior of the iptable
+# action (so that the ban is immediate) the /etc/shorewall/shorewall.conf
+# file should me modified with "BLACKLISTNEWONLY=No".
+#
+#
+# Enable shorewall to use a blacklist using iptables creating a file
+# /etc/shorewall/blrules and adding "DROP net:+f2b-ssh all" and
+# similar lines for every jail.  To enable restoring you ipset you
+# must set SAVE_IPSETS=Yes in shorewall.conf .  You can read more
+# about ipsets handling in Shorewall at http://shorewall.net/ipsets.html
+#
+# To force creation of the ipset in the case that somebody deletes the
+# ipset create a file /etc/shorewall/initdone and add one line for
+# every ipset (this files are in Perl) and add 1 at the end of the file.
+# The example:
+# system("/usr/sbin/ipset -quiet -exist create f2b-ssh hash:ip timeout 600 ");
+# 1;
+#
+# To destroy the ipset in shorewall you must add to the file /etc/shorewall/stopped
+# # One line of every ipset
+# system("/usr/sbin/ipset -quiet destroy f2b-ssh ");
+# 1; # This must go to the end of the file if not shorewall compilation fails
+#
+
+
+[Definition]
+
+# Option:  actionstart
+# Notes.:  command executed on demand at the first ban (or at the start of Fail2Ban if actionstart_on_demand is set to false).
+# Values:  CMD
+#
+actionstart = if ! ipset -quiet -name list f2b-<name> >/dev/null;
+              then ipset -quiet -exist create f2b-<name> hash:ip timeout <default-ipsettime>;
+              fi
+
+# Option:  actionstop
+# Notes.:  command executed at the stop of jail (or at the end of Fail2Ban)
+# Values:  CMD
+#
+actionstop = ipset flush f2b-<name>
+
+# Option:  actionban
+# Notes.:  command executed when banning an IP. Take care that the
+#          command is executed with Fail2Ban user rights.
+# Tags:    See jail.conf(5) man page
+# Values:  CMD
+#
+actionban = ipset add f2b-<name> <ip> timeout <ipsettime> -exist
+
+# actionprolong = %(actionban)s
+
+# Option:  actionunban
+# Notes.:  command executed when unbanning an IP. Take care that the
+#          command is executed with Fail2Ban user rights.
+# Tags:    See jail.conf(5) man page
+# Values:  CMD
+#
+actionunban = ipset del f2b-<name> <ip> -exist
+
+# Option: default-ipsettime
+# Notes:  specifies default timeout in seconds (handled default ipset timeout only)
+# Values:  [ NUM ]  Default: 0 (no timeout, managed by fail2ban by unban)
+default-ipsettime = 0
+
+# Option: ipsettime
+# Notes:  specifies ticket timeout (handled ipset timeout only)
+# Values:  [ NUM ]  Default: 0 (managed by fail2ban by unban)
+ipsettime = 0
+
+# expresion to caclulate timeout from bantime, example:
+# banaction = %(known/banaction)s[ipsettime='<timeout-bantime>']
+timeout-bantime = $([ "<bantime>" -le 2147483 ] && echo "<bantime>" || echo 0)