libvirt_hook.sh

#!/bin/bash

Guest_name=exmaple.com
Host_ports=("7626" "8080" "8008")
Guest_ipaddr=192.168.0.1
Guest_ports=("22" "8001" "8008")

if [ "${1}" = "${Guest_name}" ]; then
   if [ "${2}" = "start" ]; then
      for ((i=0;i<${#Host_ports[@]};i++)); do
          Host_port=${Host_ports[${i}]}
          Guest_port=${Guest_ports[${i}]}
	  iptables -t nat -A PREROUTING -i eth1 -p tcp --dport ${Host_port} -j DNAT \
        	      --to ${Guest_ipaddr}:${Guest_port}
	  iptables -I FORWARD -d ${Guest_ipaddr}/32 -p tcp -m state --state NEW \
	              -m tcp --dport ${Guest_port} -j ACCEPT
      done
  elif [ "${2}" = "stopped" ]; then
      for ((i=0;i<${#Host_ports[@]};i++)); do
          Host_port=${Host_ports[${i}]}
          Guest_port=${Guest_ports[${i}]}
          iptables -t nat -D PREROUTING -i eth1 -p tcp --dport ${Host_port} -j DNAT \
               --to ${Guest_ipaddr}:${Guest_port}
          iptables -D FORWARD -d ${Guest_ipaddr}/32 -p tcp -m state --state NEW \
               -m tcp --dport ${Guest_port} -j ACCEPT
      done
  fi
fi