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: / etc / fail2ban / action.d /
Filename : iptables-multiport-log.conf
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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-common.conf

[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 = <iptables> -N f2b-<name>
              <iptables> -A f2b-<name> -j <returntype>
              <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:  actionflush
# Notes.:  command executed once to flush IPS, by shutdown (resp. by stop of the jail or this action)
# Values:  CMD
#
actionflush = <iptables> -F f2b-<name>
              <iptables> -F f2b-<name>-log

# Option:  actionstop
# Notes.:  command executed at the stop of jail (or at the end of Fail2Ban)
# Values:  CMD
#
actionstop = <iptables> -D <chain> -p <protocol> -m multiport --dports <port> -j f2b-<name>
             <actionflush>
             <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]