Difference between revisions of "nmap random source IP spoofing script"

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This script was used to generate firewall logs and represent a wide array of incoming traffic.  The "-sS" only sends a syn packet, it doesn't try to complete a handshake.  Without it, nmap might try to bind to a socket, which will fail because the source IPs it is trying to bind with are faked.
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This script was used to generate firewall logs and represent a wide array of incoming traffic.  It chooses a random source IP to spoof and a random service port.  The "-sS" only sends a syn packet, it doesn't try to complete a handshake.  Without it, nmap might try to bind to a socket, which will fail because the source IPs it is trying to bind with are faked.
  
 
'''Usage: nmaspoof limit destination'''<br>
 
'''Usage: nmaspoof limit destination'''<br>

Latest revision as of 01:39, 9 May 2013

This script was used to generate firewall logs and represent a wide array of incoming traffic. It chooses a random source IP to spoof and a random service port. The "-sS" only sends a syn packet, it doesn't try to complete a handshake. Without it, nmap might try to bind to a socket, which will fail because the source IPs it is trying to bind with are faked.

Usage: nmaspoof limit destination
where nmaspoof is the name of the script below
limit is the number of packets / loops of the script you desire
destination is the hostname or IP to target

the script...

#!/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