ike-scan command not found

Introduction

When you run more command in linux terminal / console, you get the following error message

ike-scan: command not found

or when using sudo you get the following error message

sudo: ike-scan: command not found

Solutions to ike-scan: command not found

How To Fix ike-scan: command not found in Ubuntu / Debian / Kali Linux / Raspbian

In Ubuntu ike-scan is provided by ike-scan package.

ike-scan is:

ike-scan discovers IKE hosts and can also fingerprint them using the retransmission backoff pattern.

ike-scan does two things:

a) Discovery: Determine which hosts are running IKE. This is done by displaying those hosts which respond to the IKE requests sent by ike-scan.

b) Fingerprinting: Determine which IKE implementation the hosts are using. This is done by recording the times of the IKE response packets from the target hosts and comparing the observed retransmission backoff pattern against known patterns.

The retransmission backoff fingerprinting concept is discussed in more
detail in the UDP backoff fingerprinting paper which should be included
in the ike-scan kit as udp-backoff-fingerprinting-paper.txt.

To fix this problem, we can install more using the command below.

sudo apt-get -y install ike-scan

This command might take some time to finish depending on your machine internet connection.

You can also use apt command to install ike-scan.

sudo apt -y install ike-scan

Or if you have aptitude installed you can use the following command.

sudo aptitude install ike-scan

Summary

In this tutorial we learn how to fix ike-scan command not found error in Ubuntu / Debian / Kali Linux or Raspbian distribution.