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0.8.6/action.d/iptables-multiport-log.local

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+# Fail2Ban configuration file
+#
+# Author: Guido Bozzetto
+# Modified: Cyril Jaquier
+#
+# make "f2b-<name>" chain to match drop IP
+# make "f2b-<name>-log" chain to log and drop
+# insert a jump to f2b-<name> from -I <chain> if proto/port match
+#
+#
+
+[INCLUDES]
+
+before = iptables-blocktype.conf
+
+[Definition]
+
+# Option:  actionstart
+# Notes.:  command executed once at the start of Fail2Ban.
+# Values:  CMD
+#
+actionstart = iptables -N f2b-<name>
+              iptables -A f2b-<name> -j RETURN
+              iptables -I <chain> 1 -p <protocol> -m multiport --dports <port> -j f2b-<name>
+              iptables -N f2b-<name>-log
+              iptables -I f2b-<name>-log -j LOG --log-prefix "$(expr f2b-<name> : '\(.\{1,23\}\)'):DROP " --log-level warning -m limit --limit 6/m --limit-burst 2
+              iptables -A f2b-<name>-log -j <blocktype>
+
+# Option:  actionstop
+# Notes.:  command executed once at the end of Fail2Ban
+# Values:  CMD
+#
+actionstop = iptables -D <chain> -p <protocol> -m multiport --dports <port> -j f2b-<name>
+             iptables -F f2b-<name>
+             iptables -F f2b-<name>-log
+             iptables -X f2b-<name>
+             iptables -X f2b-<name>-log
+
+# Option:  actioncheck
+# Notes.:  command executed once before each actionban command
+# Values:  CMD
+#
+actioncheck = iptables -n -L f2b-<name>-log >/dev/null
+
+# 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 = iptables -I f2b-<name> 1 -s <ip> -j f2b-<name>-log
+
+# 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 = iptables -D f2b-<name> -s <ip> -j f2b-<name>-log
+
+[Init]
+
+# Default name of the chain
+#
+name = default
+
+# Option:  port
+# Notes.:  specifies port to monitor
+# Values:  [ NUM | STRING ]  Default:
+#
+port = ssh
+
+# Option:  protocol
+# Notes.:  internally used by config reader for interpolations.
+# Values:  [ tcp | udp | icmp | all ] Default: tcp
+#
+protocol = tcp
+
+# Option:  chain
+# Notes    specifies the iptables chain to which the fail2ban rules should be
+#          added
+# Values:  STRING  Default: INPUT
+chain = INPUT