shorewall_code/Shorewall/action.AutoBL

#
# Shorewall version 5 - Auto Blacklist Action
#
# Parameters are:
#
#    Event          - Name of the event to associate with this blacklist
#    Interval
#    Count          - Interval and number of Packets to trigger blacklisting
#                     Default is 60 seconds and 5 packets.
#    Successive     - If a matching packet arrives within this many
#                     seconds of the preceding one, it should be logged
#                     and dealt with according to the Disposition and
#                     Log Level parameters below. Default is 2 seconds.
#    Blacklist time - Number of seconds to blacklist
#                     Default is 300 (5 minutes)
#    Disposition    - Disposition of blacklisted packets
#                     Default is DROP
#    Log Level      - Level to Log Rejects
#                     Default is info (6)
#
?format 2
DEFAULTS -,60,5,2,300,DROP,info

?begin perl

use Shorewall::Config;

my ( $event, $interval, $count, $successive, $bltime, $disposition, $level ) = get_action_params(7);

fatal_error "The event name parameter to AutoBL is required"            unless supplied $event;
fatal_error "Invalid interval ($interval) passed to AutoBL"             unless $interval =~ /^\d+$/ && $interval;
fatal_error "Invalid successive interval ($succesive) passed to AutoBL" unless $successive =~ /^\d+$/;
fatal_error "Invalid packet count ($count) passed to AutoBL"            unless $count =~ /^\d+$/ && $count;
fatal_error "Invalid blacklist time ($bltime) passed to AutoBL"         unless $bltime =~ /^\d+$/ && $bltime;
validate_level( $level );
1;
?end perl
###############################################################################
#TARGET		SOURCE	DEST	PROTO	DPORT	SPORT
#
# Silently reject the client if blacklisted
#
?if $REAP_OPTION
?set check_param 'check:reap'
?else
?set check_param 'check'
?endif
IfEvent(${1}_BL,$6,$5,1,src,$check_param)
#
# Blacklist if M attempts in the last N seconds
#
IfEvent($1,AutoBLL($1,$6,$7),$2,$3,src,$check_param)
#
# Log and reject if the client has tried to connect
# in the last N seconds
#
?if $4
IfEvent($1,$6:$7,$4,1,-,update,Added)
?endif
#
# Un-blacklist the client
#
ResetEvent(${1}_BL,LOG:$7,-,Removed)
#
# Set the event and accept the connection
#
SetEvent($1,ACCEPT,src)