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https://github.com/vincentmli/bpfire.git
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Merge remote-tracking branch 'stevee/next-suricata' into next
This commit is contained in:
Michael Tremer
33
src/initscripts/networking/red.up/23-suricata
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33
src/initscripts/networking/red.up/23-suricata
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@@ -0,0 +1,33 @@
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#!/usr/bin/perl
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#
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# Helper script to regenerate the file which contains the HOME_NET declaration
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# including the assigned IP-address of red and any configured aliases.
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use strict;
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require '/var/ipfire/general-functions.pl';
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require "${General::swroot}/ids-functions.pl";
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# Hash to store the IDS settings.
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my %ids_settings = ();
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# Read-in IDS settings.
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&General::readhash("$IDS::ids_settings_file", \%ids_settings);
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# Check if suricata is enabled.
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if($ids_settings{'ENABLE_IDS'} eq "on") {
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# Regenerate the file with HOME_NET details.
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&IDS::generate_home_net_file();
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# Set correct ownership.
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&IDS::set_ownership("$IDS::homenet_file");
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# Check if suricata is running.
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if(&IDS::ids_is_running()) {
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# Call suricatactrl to perform a restart of suricata.
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&IDS::call_suricatactrl("restart");
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} else {
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# Call suricatactrl to start suricata.
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&IDS::call_suricatactrl("start");
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}
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}
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@@ -185,6 +185,12 @@ iptables_init() {
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iptables -A INPUT -j GUARDIAN
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iptables -A FORWARD -j GUARDIAN
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# IPS (suricata) chains
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iptables -N IPS
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iptables -A INPUT -j IPS
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iptables -A FORWARD -j IPS
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iptables -A OUTPUT -j IPS
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# Block non-established IPsec networks
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iptables -N IPSECBLOCK
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iptables -A FORWARD -m policy --dir out --pol none -j IPSECBLOCK
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@@ -1,146 +0,0 @@
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#!/bin/sh
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########################################################################
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# Begin $rc_base/init.d/snort
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#
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# Description : Snort Initscript
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#
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# Authors : Michael Tremer for ipfire.org - mitch@ipfire.org
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#
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# Version : 01.00
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#
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# Notes :
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#
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########################################################################
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. /etc/sysconfig/rc
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. ${rc_functions}
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PATH=/usr/local/sbin:/usr/local/bin:/bin:/usr/bin:/sbin:/usr/sbin; export PATH
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eval $(/usr/local/bin/readhash /var/ipfire/ethernet/settings)
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eval $(/usr/local/bin/readhash /var/ipfire/snort/settings)
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ALIASFILE="/var/ipfire/ethernet/aliases"
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case "$1" in
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start)
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if [ "$BLUE_NETADDRESS" ]; then
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BLUE_NET="$BLUE_NETADDRESS/$BLUE_NETMASK,"
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BLUE_IP="$BLUE_ADDRESS,"
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fi
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if [ "$ORANGE_NETADDRESS" ]; then
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ORANGE_NET="$ORANGE_NETADDRESS/$ORANGE_NETMASK,"
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ORANGE_IP="$ORANGE_ADDRESS,"
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fi
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if [ "$ENABLE_SNORT_ORANGE" == "on" ]; then
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DEVICES+="$ORANGE_DEV "
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HOMENET+="$ORANGE_IP"
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else
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HOMENET+="$ORANGE_NET"
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fi
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if [ "$ENABLE_SNORT_BLUE" == "on" ]; then
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DEVICES+="$BLUE_DEV "
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HOMENET+="$BLUE_IP"
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else
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HOMENET+="$BLUE_NET"
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fi
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if [ "$ENABLE_SNORT_GREEN" == "on" ]; then
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DEVICES+="$GREEN_DEV "
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HOMENET+="$GREEN_ADDRESS,"
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else
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HOMENET+="$GREEN_NETADDRESS/$GREEN_NETMASK,"
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fi
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if [ "$ENABLE_SNORT" == "on" ]; then
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DEVICES+=`cat /var/ipfire/red/iface 2>/dev/null`
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LOCAL_IP=`cat /var/ipfire/red/local-ipaddress 2>/dev/null`
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if [ "$LOCAL_IP" ]; then
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HOMENET+="$LOCAL_IP,"
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fi
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# Check if the red device is set to static and
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# any aliases have been configured.
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if [ "${RED_TYPE}" == "STATIC" ] && [ -s "${ALIASFILE}" ]; then
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# Read in aliases file.
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while IFS="," read -r address mode remark; do
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# Check if the alias is enabled.
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[ "${mode}" = "on" ] || continue
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# Add alias to the list of HOMENET addresses.
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HOMENET+="${address},"
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done < "${ALIASFILE}"
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fi
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fi
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HOMENET+="127.0.0.1"
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echo "ipvar HOME_NET [$HOMENET]" > /etc/snort/vars
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DNS1=`cat /var/ipfire/red/dns1 2>/dev/null`
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DNS2=`cat /var/ipfire/red/dns2 2>/dev/null`
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if [ "$DNS2" ]; then
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echo "ipvar DNS_SERVERS [$DNS1,$DNS2]" >> /etc/snort/vars
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else
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echo "ipvar DNS_SERVERS $DNS1" >> /etc/snort/vars
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fi
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for DEVICE in $DEVICES; do
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boot_mesg "Starting Intrusion Detection System on $DEVICE..."
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/usr/sbin/snort -c /etc/snort/snort.conf -i $DEVICE -D -l /var/log/snort --create-pidfile --nolock-pidfile --pid-path /var/run
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evaluate_retval
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sleep 1
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chmod 644 /var/run/snort_$DEVICE.pid
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done
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;;
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stop)
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DEVICES=""
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if [ -r /var/run/snort_$BLUE_DEV.pid ]; then
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DEVICES+="$BLUE_DEV "
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fi
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if [ -r /var/run/snort_$GREEN_DEV.pid ]; then
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DEVICES+="$GREEN_DEV "
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fi
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if [ -r /var/run/snort_$ORANGE_DEV.pid ]; then
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DEVICES+="$ORANGE_DEV "
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fi
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RED=`cat /var/ipfire/red/iface 2>/dev/null`
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if [ -r /var/run/snort_$RED.pid ]; then
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DEVICES+=`cat /var/ipfire/red/iface 2>/dev/null`
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fi
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for DEVICE in $DEVICES; do
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boot_mesg "Stopping Intrusion Detection System on $DEVICE..."
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killproc -p /var/run/snort_$DEVICE.pid /var/run
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done
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rm /var/run/snort_* >/dev/null 2>/dev/null
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# Don't report returncode of rm if snort was not started
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exit 0
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;;
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status)
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statusproc /usr/sbin/snort
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;;
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restart)
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$0 stop
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$0 start
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;;
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*)
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echo "Usage: $0 {start|stop|restart|status}"
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exit 1
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;;
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esac
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chmod 644 /var/log/snort/* 2>/dev/null
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# End $rc_base/init.d/snort
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174
src/initscripts/system/suricata
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174
src/initscripts/system/suricata
Normal file
@@ -0,0 +1,174 @@
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#!/bin/sh
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########################################################################
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# Begin $rc_base/init.d/suricata
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#
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# Description : Suricata Initscript
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#
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# Author : Stefan Schantl <stefan.schantl@ipfire.org>
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#
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# Version : 01.00
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#
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# Notes :
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#
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########################################################################
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. /etc/sysconfig/rc
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. ${rc_functions}
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PATH=/usr/local/sbin:/usr/local/bin:/bin:/usr/bin:/sbin:/usr/sbin; export PATH
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eval $(/usr/local/bin/readhash /var/ipfire/suricata/settings)
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# Name of the firewall chain.
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FW_CHAIN="IPS"
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# Optional options for the Netfilter queue.
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NFQ_OPTS="--queue-bypass "
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# Array containing the 4 possible network zones.
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network_zones=( red green blue orange )
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# Mark and Mask options.
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MARK="0x70000000"
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MASK="0x70000000"
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# PID file of suricata.
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PID_FILE="/var/run/suricata.pid"
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# Function to get the amount of CPU cores of the system.
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function get_cpu_count {
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CPUCOUNT=0
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# Loop through "/proc/cpuinfo" and count the amount of CPU cores.
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while read line; do
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[ "$line" ] && [ -z "${line%processor*}" ] && ((CPUCOUNT++))
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done </proc/cpuinfo
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echo $CPUCOUNT
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}
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# Function to create the firewall rules to pass the traffic to suricata.
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function generate_fw_rules {
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cpu_count=$(get_cpu_count)
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# Flush the firewall chain.
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iptables -F "$FW_CHAIN"
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# Loop through the array of network zones.
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for zone in "${network_zones[@]}"; do
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# Convert zone into upper case.
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zone_upper=${zone^^}
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# Generate variable name for checking if the IDS is
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# enabled on the zone.
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enable_ids_zone="ENABLE_IDS_$zone_upper"
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# Check if the IDS is enabled for this network zone.
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if [ "${!enable_ids_zone}" == "on" ]; then
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# Generate name of the network interface.
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network_device=$zone
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network_device+="0"
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# Assign NFQ_OPTS
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NFQ_OPTIONS=$NFQ_OPTS
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# Check if there are multiple cpu cores available.
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if [ "$cpu_count" -gt "1" ]; then
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# Balance beetween all queues.
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NFQ_OPTIONS+="--queue-balance 0:"
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NFQ_OPTIONS+=$(($cpu_count-1))
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else
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# Send all packets to queue 0.
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NFQ_OPTIONS+="--queue-num 0"
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fi
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# Create firewall rules to queue the traffic and pass to
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# the IDS.
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iptables -I "$FW_CHAIN" -i "$network_device" -m mark ! --mark "$MARK"/"$MASK" -j NFQUEUE $NFQ_OPTIONS
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iptables -I "$FW_CHAIN" -o "$network_device" -m mark ! --mark "$MARK"/"$MASK" -j NFQUEUE $NFQ_OPTIONS
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fi
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done
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# Clear repeat bit, so that it does not confuse IPsec or QoS
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iptables -A "${FW_CHAIN}" -j MARK --set-xmark "0x0/${MASK}"
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}
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# Function to flush the firewall chain.
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function flush_fw_chain {
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# Call iptables and flush the chain
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iptables -F "$FW_CHAIN"
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}
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case "$1" in
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start)
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# Get amount of CPU cores.
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cpu_count=$(get_cpu_count)
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# Numer of NFQUES.
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NFQUEUES=
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for i in $(seq 0 $((cpu_count-1)) ); do
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NFQUEUES+="-q $i "
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done
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# Check if the IDS should be started.
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if [ "$ENABLE_IDS" == "on" ]; then
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# Start the IDS.
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boot_mesg "Starting Intrusion Detection System..."
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/usr/bin/suricata -c /etc/suricata/suricata.yaml -D $NFQUEUES >/dev/null 2>/dev/null
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evaluate_retval
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# Allow reading the pidfile.
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chmod 644 $PID_FILE
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# Flush the firewall chain
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flush_fw_chain
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# Generate firewall rules
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generate_fw_rules
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fi
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;;
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stop)
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boot_mesg "Stopping Intrusion Detection System..."
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killproc -p $PID_FILE /var/run
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# Flush firewall chain.
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flush_fw_chain
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# Remove suricata control socket.
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rm /var/run/suricata/* >/dev/null 2>/dev/null
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# Don't report returncode of rm if suricata was not started
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exit 0
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;;
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status)
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statusproc /usr/bin/suricata
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;;
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restart)
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$0 stop
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$0 start
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;;
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reload)
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# Send SIGUSR2 to the suricata process to perform a reload
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# of the ruleset.
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kill -USR2 $(pidof suricata)
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# Flush the firewall chain.
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flush_fw_chain
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# Generate firewall rules.
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generate_fw_rules
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;;
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*)
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echo "Usage: $0 {start|stop|restart|reload|status}"
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exit 1
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;;
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esac
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chmod 644 /var/log/suricata/* 2>/dev/null
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# End $rc_base/init.d/suricata
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