Added fail2ban, though not sure its configured correctly yet

docker/rootfs/fail2ban/action.d/firewallcmd-ipset.conf

@@ -0,0 +1,122 @@
+## Version 2022/08/06
+# Fail2Ban action file for firewall-cmd/ipset
+#
+# This requires:
+# ipset (package: ipset)
+# firewall-cmd (package: firewalld)
+#
+# This is for ipset protocol 6 (and hopefully later) (ipset v6.14).
+# Use ipset -V to see the protocol and version.
+#
+# IPset was a feature introduced in the linux kernel 2.6.39 and 3.0.0 kernels.
+#
+# If you are running on an older kernel you make need to patch in external
+# modules.
+
+[INCLUDES]
+
+before = firewallcmd-common.conf
+
+[Definition]
+
+actionstart = <ipstype_<ipsettype>/actionstart>
+              firewall-cmd --direct --add-rule <family> filter <chain> 0 <actiontype> -m set --match-set <ipmset> src -j <blocktype>
+
+actionflush = <ipstype_<ipsettype>/actionflush>
+
+actionstop = firewall-cmd --direct --remove-rule <family> filter <chain> 0 <actiontype> -m set --match-set <ipmset> src -j <blocktype>
+             <actionflush>
+             <ipstype_<ipsettype>/actionstop>
+
+actionban = <ipstype_<ipsettype>/actionban>
+
+# actionprolong = %(actionban)s
+
+actionunban = <ipstype_<ipsettype>/actionunban>
+
+[ipstype_ipset]
+
+actionstart = ipset -exist create <ipmset> hash:ip timeout <default-ipsettime> <familyopt>
+
+actionflush = ipset flush <ipmset>
+
+actionstop = ipset destroy <ipmset>
+
+actionban = ipset -exist add <ipmset> <ip> timeout <ipsettime>
+
+actionunban = ipset -exist del <ipmset> <ip>
+
+[ipstype_firewalld]
+
+actionstart = firewall-cmd --direct --new-ipset=<ipmset> --type=hash:ip --option=timeout=<default-ipsettime> <firewalld_familyopt>
+
+# TODO: there doesn't seem to be an explicit way to invoke the ipset flush function using firewall-cmd
+actionflush = 
+
+actionstop = firewall-cmd --direct --delete-ipset=<ipmset>
+
+actionban = firewall-cmd --ipset=<ipmset> --add-entry=<ip>
+
+actionunban = firewall-cmd --ipset=<ipmset> --remove-entry=<ip>
+
+[Init]
+
+# Option:  chain
+# Notes    specifies the iptables chain to which the fail2ban rules should be
+#          added
+# Values:  [ STRING ]
+#
+chain = INPUT_direct
+
+# 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)
+
+# Option: ipsettype
+# Notes.: defines type of ipset used for match-set (firewalld or ipset)
+# Values: firewalld or ipset
+# Default: ipset
+ipsettype = ipset
+
+# Option: actiontype
+# Notes.: defines additions to the blocking rule
+# Values: leave empty to block all attempts from the host
+# Default: Value of the multiport
+actiontype = <multiport>
+
+# Option: allports
+# Notes.: default addition to block all ports
+# Usage.: use in jail config:  banaction = firewallcmd-ipset[actiontype=<allports>]
+#         for all protocols:   banaction = firewallcmd-ipset[actiontype=""]
+allports = -p <protocol>
+
+# Option: multiport
+# Notes.: addition to block access only to specific ports
+# Usage.: use in jail config:  banaction = firewallcmd-ipset[actiontype=<multiport>]
+multiport = -p <protocol> -m multiport --dports <port>
+
+ipmset = f2b-<name>
+familyopt =
+firewalld_familyopt =
+
+[Init?family=inet6]
+
+ipmset = f2b-<name>6
+familyopt = family inet6
+firewalld_familyopt = --option=family=inet6
+
+
+# DEV NOTES:
+#
+# Author: Edgar Hoch, Daniel Black, Sergey Brester and Mihail Politaev
+# firewallcmd-new / iptables-ipset-proto6 combined for maximium goodness