Code for GNS3, EVE-NG , PNET LAB Code for GNS3, EVE-NG , PNET LAB is a tool used to generate license keys for Cisco IOU images. The use of IOU images requires a valid license key to function properly.

To use, follow these steps:

  1. Download the file from a reputable source.
  2. Install Python on your system if it is not already installed.
  3. Open a command prompt or terminal window and navigate to the directory where the file is located.
  4. Run the command “python” to execute the script.
  5. Enter the hostname and feature set of the IOU image for which you want to generate a license key.
  6. The tool will generate a valid license key that can be used with the specified IOU image.

To use IOU images in GNS3, EVE-NG or PNET LAB, you need to follow the guidelines and policies of the respective software vendors. It is recommended to use legally licensed software and follow the proper procedures for installation and configuration.

#! /usr/bin/python
print (“\n**************************************************************”)
print “Cisco IOU License Generator – Kal 2011, python port of 2006 C version”
import os
import socket
import hashlib
import struct
# get the host id and host name to calculate the hostkey
hostname = socket.gethostname()
for x in hostname:
ioukey = ioukey + ord(x)
print “hostid=” + hostid +”, hostname=”+ hostname + “, ioukey=” + hex(ioukey)[2:]
# create the license using md5sum
iouPad2=’\x80′ + 39*’\0′
md5input=iouPad1 + iouPad2 + struct.pack(‘!L’, ioukey) + iouPad1
# add license info to $HOME/.iourc
print (“\n**************************************************************”)
print “Create the license file $HOME/.iourc with this command:”
print “\nThe command adds the following text to $HOME/.iourc:”
print “[license]\n” + hostname + ” = ” + iouLicense + “;”
# disable phone home feature
print (“\n**************************************************************”)
print “Disable the phone home feature with this command:”
print ” grep -q -F ‘’ /etc/hosts || echo ‘’ | sudo tee -a /etc/hosts”
print “\nThe command adds the following text to /etc/hosts:”
print “”
print (“\n**************************************************************”)
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