+++ /dev/null
-#!/bin/sh
-# Adds an IP to the iptables drop list (if linux)
-# Adds an IP to the ipfilter drop list (if solaris, freebsd or netbsd)
-# Adds an IP to the ipsec drop list (if aix)
-# Requirements: Linux with iptables, Solaris/FreeBSD/NetBSD with ipfilter or AIX with IPSec
-# Expect: srcip
-# Author: Ahmet Ozturk (ipfilter and IPSec)
-# Author: Daniel B. Cid (iptables)
-# Author: cgzones
-# Last modified: Oct 04, 2012
-
-UNAME=`uname`
-ECHO="/bin/echo"
-GREP="/bin/grep"
-IPTABLES=""
-IP4TABLES="/sbin/iptables"
-IP6TABLES="/sbin/ip6tables"
-IPFILTER="/sbin/ipf"
-if [ "X$UNAME" = "XSunOS" ]; then
- IPFILTER="/usr/sbin/ipf"
-fi
-GENFILT="/usr/sbin/genfilt"
-LSFILT="/usr/sbin/lsfilt"
-MKFILT="/usr/sbin/mkfilt"
-RMFILT="/usr/sbin/rmfilt"
-ARG1=""
-ARG2=""
-RULEID=""
-ACTION=$1
-USER=$2
-IP=$3
-PWD=`pwd`
-LOCK="${PWD}/fw-drop"
-LOCK_PID="${PWD}/fw-drop/pid"
-IPV4F="/proc/sys/net/ipv4/ip_forward"
-IPV6F="/proc/sys/net/ipv6/conf/all/forwarding"
-
-LOCAL=`dirname $0`;
-cd $LOCAL
-cd ../
-filename=$(basename "$0")
-
-LOG_FILE="${PWD}/../logs/active-responses.log"
-
-echo "`date` $0 $1 $2 $3 $4 $5" >> ${LOG_FILE}
-
-
-# Checking for an IP
-if [ "x${IP}" = "x" ]; then
- echo "$0: <action> <username> <ip>"
- exit 1;
-fi
-
-case "${IP}" in
- *:* ) IPTABLES=$IP6TABLES;;
- *.* ) IPTABLES=$IP4TABLES;;
- * ) echo "`date` Unable to run active response (invalid IP: '${IP}')." >> ${LOG_FILE} && exit 1;;
-esac
-
-# This number should be more than enough (even if a hundred
-# instances of this script is ran together). If you have
-# a really loaded env, you can increase it to 75 or 100.
-MAX_ITERATION="50"
-
-# Lock function
-lock()
-{
- i=0;
- # Providing a lock.
- while [ 1 ]; do
- mkdir ${LOCK} > /dev/null 2>&1
- MSL=$?
- if [ "${MSL}" = "0" ]; then
- # Lock acquired (setting the pid)
- echo "$$" > ${LOCK_PID}
- return;
- fi
-
- # Getting currently/saved PID locking the file
- C_PID=`cat ${LOCK_PID} 2>/dev/null`
- if [ "x" = "x${S_PID}" ]; then
- S_PID=${C_PID}
- fi
-
- # Breaking out of the loop after X attempts
- if [ "x${C_PID}" = "x${S_PID}" ]; then
- i=`expr $i + 1`;
- fi
-
- sleep $i;
-
- i=`expr $i + 1`;
-
- # So i increments 2 by 2 if the pid does not change.
- # If the pid keeps changing, we will increments one
- # by one and fail after MAX_ITERACTION
-
- if [ "$i" = "${MAX_ITERATION}" ]; then
- kill="false"
- for pid in `pgrep -f "${filename}"`; do
- if [ "x${pid}" = "x${C_PID}" ]; then
- # Unlocking and exiting
- kill -9 ${C_PID}
- echo "`date` Killed process ${C_PID} holding lock." >> ${LOG_FILE}
- kill="true"
- unlock;
- i=0;
- S_PID="";
- break;
- fi
- done
-
- if [ "x${kill}" = "xfalse" ]; then
- echo "`date` Unable kill process ${C_PID} holding lock." >> ${LOG_FILE}
- # Unlocking and exiting
- unlock;
- exit 1;
- fi
- fi
- done
-}
-
-# Unlock function
-unlock()
-{
- rm -rf ${LOCK}
-}
-
-
-
-# Blocking IP
-if [ "x${ACTION}" != "xadd" -a "x${ACTION}" != "xdelete" ]; then
- echo "$0: invalid action: ${ACTION}"
- exit 1;
-fi
-
-
-
-# We should run on linux
-if [ "X${UNAME}" = "XLinux" ]; then
- if [ "x${ACTION}" = "xadd" ]; then
- ARG1="-I INPUT -s ${IP} -j DROP"
- ARG2="-I FORWARD -s ${IP} -j DROP"
- else
- ARG1="-D INPUT -s ${IP} -j DROP"
- ARG2="-D FORWARD -s ${IP} -j DROP"
- fi
-
- # Checking if iptables is present
- if [ ! -x ${IPTABLES} ]; then
- IPTABLES="/usr"${IPTABLES}
- if [ ! -x ${IPTABLES} ]; then
- echo "$0: can not find iptables"
- exit 0;
- fi
- fi
-
- # Executing and exiting
- COUNT=0;
- lock;
- while [ 1 ]; do
- ${IPTABLES} ${ARG1}
- RES=$?
- if [ $RES = 0 ]; then
- break;
- else
- COUNT=`expr $COUNT + 1`;
- echo "`date` Unable to run (iptables returning != $RES): $COUNT - $0 $1 $2 $3 $4 $5" >> ${LOG_FILE}
- sleep $COUNT;
-
- if [ $COUNT -gt 4 ]; then
- break;
- fi
- fi
- done
-
- COUNT=0;
- while [ 1 ]; do
- #
- # Looking for IPV4 and IPV6 FORWARD
- #
- if [ -e "$IPV4F" ]
- then
- IPV4KEY="$(cat "$IPV4F")"
- else
- IPV4KEY="0"
- fi
- if [ -e "$IPV6F" ]
- then
- IPV6KEY="$(cat "$IPV6F")"
- else
- IPV6KEY="0"
- fi
-
- if [ "$IPV4KEY" = "0" ] && [ "$IPV6KEY" = "0" ]
- then
- break
- fi
-
- ${IPTABLES} ${ARG2}
- RES=$?
- if [ $RES = 0 ]; then
- break;
- else
- COUNT=`expr $COUNT + 1`;
- echo "`date` Unable to run (iptables returning != $RES): $COUNT - $0 $1 $2 $3 $4 $5" >> ${LOG_FILE}
- sleep $COUNT;
-
- if [ $COUNT -gt 4 ]; then
- break;
- fi
- fi
- done
- unlock;
-
- exit 0;
-
-# FreeBSD, SunOS or NetBSD with ipfilter
-elif [ "X${UNAME}" = "XFreeBSD" -o "X${UNAME}" = "XSunOS" -o "X${UNAME}" = "XNetBSD" ]; then
-
- # Checking if ipfilter is present
- ls ${IPFILTER} >> /dev/null 2>&1
- if [ $? != 0 ]; then
- exit 0;
- fi
-
- # Checking if echo is present
- ls ${ECHO} >> /dev/null 2>&1
- if [ $? != 0 ]; then
- exit 0;
- fi
-
- if [ "x${ACTION}" = "xadd" ]; then
- ARG1="\"@1 block out quick from any to ${IP}\""
- ARG2="\"@1 block in quick from ${IP} to any\""
- IPFARG="${IPFILTER} -f -"
- else
- ARG1="\"@1 block out quick from any to ${IP}\""
- ARG2="\"@1 block in quick from ${IP} to any\""
- IPFARG="${IPFILTER} -rf -"
- fi
-
- # Executing it
- eval ${ECHO} ${ARG1}| ${IPFARG}
- eval ${ECHO} ${ARG2}| ${IPFARG}
-
- exit 0;
-
-# AIX with ipsec
-elif [ "X${UNAME}" = "XAIX" ]; then
-
- # Checking if genfilt is present
- ls ${GENFILT} >> /dev/null 2>&1
- if [ $? != 0 ]; then
- exit 0;
- fi
-
- # Checking if lsfilt is present
- ls ${LSFILT} >> /dev/null 2>&1
- if [ $? != 0 ]; then
- exit 0;
- fi
- # Checking if mkfilt is present
- ls ${MKFILT} >> /dev/null 2>&1
- if [ $? != 0 ]; then
- exit 0;
- fi
-
- # Checking if rmfilt is present
- ls ${RMFILT} >> /dev/null 2>&1
- if [ $? != 0 ]; then
- exit 0;
- fi
-
- if [ "x${ACTION}" = "xadd" ]; then
- ARG1=" -v 4 -a D -s ${IP} -m 255.255.255.255 -d 0.0.0.0 -M 0.0.0.0 -w B -D \"Access Denied by OSSEC-HIDS\""
- #Add filter to rule table
- eval ${GENFILT} ${ARG1}
-
- #Deactivate and activate the filter rules.
- eval ${MKFILT} -v 4 -d
- eval ${MKFILT} -v 4 -u
- else
- # removing a specific rule is not so easy :(
- eval ${LSFILT} -v 4 -O | ${GREP} ${IP} |
- while read -r LINE
- do
- RULEID=`${ECHO} ${LINE} | cut -f 1 -d "|"`
- let RULEID=${RULEID}+1
- ARG1=" -v 4 -n ${RULEID}"
- eval ${RMFILT} ${ARG1}
- done
- #Deactivate and activate the filter rules.
- eval ${MKFILT} -v 4 -d
- eval ${MKFILT} -v 4 -u
- fi
-
-else
- exit 0;
-fi
projects / ossec-hids.git / blobdiff