#!/bin/sh
  
  # Basic ruleset used by Suricata, provided by Emerging Threats
  etUrl="https://rules.emergingthreatspro.com/open/suricata-5.0/emerging.rules.tar.gz"
  
  # Set Capture Filters
  # https://suricata.readthedocs.io/en/latest/performance/ignoring-traffic.html#capture-filters-bpf
  
  # Check connection to Emerging Threats
  wget -q --spider https://rules.emergingthreatspro.com
  
  if [ $? -eq 0 ]; then
      wget ${etUrl} -O /tmp/rules.tar.gz 2>&1 > /dev/null
      tar xvfz /tmp/rules.tar.gz -C /etc/suricata/  2>&1 > /dev/null
      sed -i s/^#alert/alert/ /etc/suricata/rules/*.rules 2>&1 > /dev/null
  else
      echo "No connection to ET, exiting..."
      exit 1
  fi