src/initscripts/system/suricata

   1 #!/bin/sh
   2 ########################################################################
   3 # Begin $rc_base/init.d/suricata
   4 #
   5 # Description : Suricata Initscript
   6 #
   7 # Author      : Stefan Schantl <stefan.schantl@ipfire.org>
   8 #
   9 # Version     : 01.00
  10 #
  11 # Notes       :
  12 #
  13 ########################################################################
  14
  15 . /etc/sysconfig/rc
  16 . ${rc_functions}
  17
  18 PATH=/usr/local/sbin:/usr/local/bin:/bin:/usr/bin:/sbin:/usr/sbin; export PATH
  19
  20 eval $(/usr/local/bin/readhash /var/ipfire/suricata/settings)
  21
  22 # Name of the firewall chain.
  23 FW_CHAIN="IPS"
  24
  25 # Optional options for the Netfilter queue.
  26 NFQ_OPTS="--queue-bypass "
  27
  28 # Array containing the 4 possible network zones.
  29 network_zones=( red green blue orange )
  30
  31 # Mark and Mask options.
  32 MARK="0x1"
  33 MASK="0x1"
  34
  35 # PID file of suricata.
  36 PID_FILE="/var/run/suricata.pid"
  37
  38 case "$1" in
  39         start)
  40                 # Get amount of CPU cores.
  41                 NFQUEUES=
  42                 CPUCOUNT=0
  43                 while read line; do
  44                         [ "$line" ] && [ -z "${line%processor*}" ] && NFQUEUES+="-q $CPUCOUNT " && ((CPUCOUNT++))
  45                 done </proc/cpuinfo
  46
  47                 # Check if the IDS should be started.
  48                 if [ "$ENABLE_IDS" == "on" ]; then
  49                         # Loop through the array of network zones.
  50                         for zone in "${network_zones[@]}"; do
  51                                 # Convert zone into upper case.
  52                                 zone_upper=${zone^^}
  53
  54                                 # Check if the IDS is enabled for this network zone.
  55                                 if [ "$ENABLE_IDS_$$zone_upper" == "on" ]; then
  56                                         # Generate name of the network interface.
  57                                         network_device=$zone
  58                                         network_device+="0"
  59
  60                                         # Assign NFQ_OPTS
  61                                         NFQ_OPTIONS=$NFQ_OPTS
  62
  63                                         # Check if there are multiple cpu cores available.
  64                                         if [ "$CPUCOUNT" > 0 ]; then
  65                                                 # Balance beetween all queues.
  66                                                 NFQ_OPTIONS+="--queue-balance 0:"
  67                                                 NFQ_OPTIONS+=$(($CPUCOUNT-1))
  68                                         else
  69                                                 # Send all packets to queue 0.
  70                                                 NFQ_OPTIONS+="--queue-num 0"
  71                                         fi
  72
  73                                         # Create firewall rules to queue the traffic and pass to
  74                                         # the IDS.
  75                                         iptables -I "$FW_CHAIN" -i "$network_device" -m mark ! --mark "$MARK"/"$MASK" -j NFQUEUE "$NFQ_OPTIONS"
  76                                         iptables -I "$FW_CHAIN" -o "$network_device" -m mark ! --mark "$MARK"/"$MASK" -j NFQUEUE "$NFQ_OPTIONS"
  77                                 fi
  78                         done
  79
  80                         # Start the IDS.
  81                         boot_mesg "Starting Intrusion Detection System..."
  82                         /usr/bin/suricata -c /etc/suricata/suricata.yaml -D $NFQUEUES
  83                         evaluate_retval
  84
  85                         # Allow reading the pidfile.
  86                         chmod 644 $PID_FILE
  87                 fi
  88         ;;
  89
  90         stop)
  91                 boot_mesg "Stopping Intrusion Detection System..."
  92                 killproc -p $PID_FILE /var/run
  93
  94                 # Flush firewall chain.
  95                 iptables -F $FW_CHAIN
  96
  97                 # Remove suricata control socket.
  98                 rm /var/run/suricata/* >/dev/null 2>/dev/null
  99
 100                 # Don't report returncode of rm if suricata was not started
 101                 exit 0
 102         ;;
 103
 104         status)
 105                 statusproc /usr/bin/suricata
 106                 ;;
 107
 108         restart)
 109                 $0 stop
 110                 $0 start
 111                 ;;
 112         reload)
 113                 # Send SIGUSR2 to the suricata process to perform a reload
 114                 # of the ruleset.
 115                 kill -USR2 $(pidof suricata)
 116                 ;;
 117
 118         *)
 119                 echo "Usage: $0 {start|stop|restart|reload|status}"
 120                 exit 1
 121                 ;;
 122 esac
 123
 124 chmod 644 /var/log/suricata/* 2>/dev/null
 125
 126 # End $rc_base/init.d/suricata