Added fail2ban, though not sure its configured correctly yet

docker/rootfs/fail2ban/action.d/shorewall.conf

@@ -0,0 +1,74 @@
+## Version 2022/08/06
+# Fail2Ban configuration file
+#
+# Author: Cyril Jaquier
+#
+#
+# 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 attempter 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 be modified with "BLACKLISTNEWONLY=No". Note that as of
+# Shorewall 4.5.13 BLACKLISTNEWONLY is deprecated; however the equivalent
+# of BLACKLISTNEWONLY=No can now be achieved by setting BLACKLIST="ALL".
+# 
+
+[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 = 
+
+# Option:  actionstop
+# Notes.:  command executed at the stop of jail (or at the end of Fail2Ban)
+# Values:  CMD
+#
+actionstop = 
+
+# Option:  actioncheck
+# Notes.:  command executed once before each actionban command
+# Values:  CMD
+#
+actioncheck = 
+
+# 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 = shorewall<family> <blocktype> <ip>
+
+# 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 = shorewall<family> allow <ip>
+
+
+[Init]
+
+# Option:  family
+# Note:    Control which version of command is executed
+# Values:  Empty or 6 in case of IPv6
+family = 
+
+# Option:  blocktype
+# Note:    This is what the action does with rules.
+#          See man page of shorewall for options that include drop, logdrop, reject, or logreject
+# Values:  STRING
+blocktype = reject
+
+[Init?family=inet6]
+
+# Option:  family
+# Note:    Control which version of command is executed
+# Values:  Empty or 6 in case of IPv6
+family = 6
+