nmap random source IP spoofing script

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#!/bin/bash

LIMIT=$1
DSTIP=$2

 for i in `seq $LIMIT`
do
  echo "limit = $LIMIT"
  RNDPORT=`echo $((RANDOM%=65535))`
  SOURCEIP=`echo $((RANDOM%=223))"."$((RANDOM%=255))"."$((RANDOM%=255))"."$((RANDOM%=254))`
  echo "running nmap with spoofed source IP $SOURCEIP"
  nmap -n --max-retries 1 --host-timeout 1 -e eth1 -sS -S $SOURCEIP $DSTIP -Pn -p $RNDPORT
done
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