--- /dev/null
+#!/bin/sh
+# Adds an IP to the IPFW drop list.
+# Only works with IPFW.
+# Expect: srcip
+# Author: Rafael Capovilla - under @ ( at ) underlinux.com.br
+# Author: Daniel B. Cid - dcid @ ( at ) ossec.net
+# Author: Charles W. Kefauver ckefauver @ ( at ) ibacom.es
+# changed for Mac OS X compatibility
+# Last modified: August 14, 2006
+
+UNAME=`uname`
+IPFW="/sbin/ipfw"
+ARG1=""
+ARG2=""
+ACTION=$1
+USER=$2
+IP=$3
+
+# warning do NOT add leading 0 in SET_ID
+SET_ID=2
+
+LOCAL=`dirname $0`;
+cd $LOCAL
+cd ../
+PWD=`pwd`
+echo "`date` $0 $1 $2 $3 $4 $5" >> ${PWD}/../logs/active-responses.log
+
+
+# Checking for an IP
+if [ "x${IP}" = "x" ]; then
+ echo "$0: <action> <username> <ip>"
+ exit 1;
+fi
+
+# Blocking IP
+if [ "x${ACTION}" != "xadd" -a "x${ACTION}" != "xdelete" ]; then
+ echo "$0: Invalid action: ${ACTION}"
+ exit 1;
+fi
+
+
+# We should run on Darwin
+if [ "X${UNAME}" = "XDarwin" ]; then
+ ls ${IPFW} >> /dev/null 2>&1
+ if [ $? != 0 ]; then
+ exit 0;
+ fi
+
+
+ # Executing and exiting
+ if [ "x${ACTION}" = "xadd" ]; then
+ #${IPFW} set disable ${SET_ID}
+ ${IPFW} -q add set ${SET_ID} deny ip from ${IP} to any
+ ${IPFW} -q add set ${SET_ID} deny ip from any to ${IP}
+ ${IPFW} -q set enable ${SET_ID}
+ exit 0;
+ fi
+
+ if [ "x${ACTION}" = "xdelete" ]; then
+ #${IPFW} -S show | grep "set ${SET_ID}" | grep "${IP}" >/dev/null 2>&1
+ #get list of ipfw rules ID to delete
+ RULES_TO_DELETE=`${IPFW} -S show | grep "set ${SET_ID}" | grep "${IP}" | awk '{print $1}'`
+
+ for RULE_ID in ${RULES_TO_DELETE}
+ do
+ ${IPFW} -q delete ${RULE_ID}
+ done
+
+ exit 0;
+ fi
+
+ exit 0;
+fi
+
+
+# Not Darwin
+exit 1;
+