Iptables Firewall

#!/bin/bash 
function CLEARRULES() {
  iptables -F
  iptables -X
}
function HELP() {
  echo -e "\e[41mErro\e[0m"
}
function CHAIN() {
  if [ $# -eq 0 ]
  then
    HELP
    $0 stop
    exit 1
  else
    OPTION=$(echo $1 | tr '[A-Z]' '[a-z]')
    case $OPTION in
      create)
        iptables -N $2
        iptables -I $2 -p all -j DROP
        iptables -I INPUT -p all -s 0.0.0.0/0 -j $2
        ;;
      allow)
        iptables -I $2  -p $3 --dport $4 -s $5 -j ACCEPT
        ;;
      *)
        HELP
        $0 stop
        exit 1
        ;;
    esac

  fi
}
ARRAY=(
  any:0.0.0.0/0:tcp:22
  server1:192.168.56.1/32:tcp:8383,8384,8385
  server2:192.168.56.2/32:tcp:8383,8384,8385
  server3:192.168.56.3/32:tcp:8383,8384,8385
  server4:192.168.56.4/32:tcp:8383,8384,8385
  server5:192.168.56.5/32:tcp:8383,8384,8385
)
if [ $# -eq 0 ]
then
  HELP
  exit 1
else
  OPTION=$(echo $1 | tr '[A-Z]' '[a-z]')
  case $OPTION in
    stop)
      CLEARRULES
      ;;
    start)
      CHAIN create BLOQUEIO
      for i in ${ARRAY[@]}
      do
        echo $i | tr ':' ' '| \
        while read SOURCENAME SOURCE PROTOCOL PORTS
        do
          echo $PORTS | tr ',' '\n' | \
          while read PORT
          do
            CHAIN allow BLOQUEIO $PROTOCOL $PORT $SOURCE
          done
        done

      done
      ;;
    status)
      iptables -L -n
      ;;
    restart)
      echo $0 stop
      echo $0 start
      echo $0 status
      ;;
    *)
      HELP
      exit 1
  esac
fi