How to Implement Digital Forensics in OMNeT++

To implement the digital forensics in OMNeT++ has needed to embarrass designing and put on the network that can detect, log, and analyze safety procedures to explore and moderate safety events. This is embraces catching network traffic, detecting anomalies, logging events, and evaluating the logs to appreciate the landscape of the attacks. Given below is the step-by-step guide to implementing digital forensics in OMNeT++ by using the INET framework:

Step-by-Step Guide

Install OMNeT++ and INET Framework

Make sure to have OMNeT++ and the INET Framework is install.

Create a New OMNeT++ Project

Open OMNeT++ IDE: Start the OMNeT++ IDE.
Create a New Project: Go to File -> New -> OMNeT++ Project. Name your project like DigitalForensicsSimulation.

Define the Network Topology

Produce a new NED file to outline the network topology, including regular hosts, routers, and forensics devices.

Example:

Digital Forensics Network Topology (DigitalForensicsNetwork.ned)

package digitalforensics;

import inet.node.inet.StandardHost;

import inet.node.inet.Router;

network DigitalForensicsNetwork

{

parameters:

@display(“bgb=800,400”);

submodules:

host1: StandardHost {

@display(“p=100,200”);

}

host2: StandardHost {

@display(“p=300,200”);

}

router: Router {

@display(“p=200,100”);

}

forensicServer: StandardHost {

@display(“p=200,300”);

}

connections allowunconnected:

host1.ethg++ <–> Eth10M <–> router.ethg++;

host2.ethg++ <–> Eth10M <–> router.ethg++;

forensicServer.ethg++ <–> Eth10M <–> router.ethg++;

}

Configure the Simulation

Make an OMNeT++ initialization file to arrange the parameters of the simulation.

Example:

Configuration File (omnetpp.ini)

[General]

network = digitalforensics.DigitalForensicsNetwork

sim-time-limit = 200s

# Visualization

*.visualizer.canvasVisualizer.displayBackground = true

*.visualizer.canvasVisualizer.displayGrid = true

# Host Configuration

*.host*.numApps = 1

*.host*.app[0].typename = “UdpBasicApp”

*.host*.app[0].destAddresses = “host2”

*.host*.app[0].destPort = 5000

*.host*.app[0].messageLength = 1024B

*.host*.app[0].sendInterval = 1s

# Forensic Server Configuration

*.forensicServer.numApps = 1

*.forensicServer.app[0].typename = “ForensicServerApp”

# IP Address Configuration

*.host1.ipv4.config = xmldoc(“host1.xml”)

*.host2.ipv4.config = xmldoc(“host2.xml”)

*.router.ipv4.config = xmldoc(“router.xml”)

*.forensicServer.ipv4.config = xmldoc(“forensicServer.xml”)

Create IP Address Configuration Files

Make XML files to describe the IP address configuration for individual node.

Example:

IP Configuration File for host1 (host1.xml)

</interface>

</config>

Example:

IP Configuration File for host2 (host2.xml)

</interface>

</config>

Example:

IP Configuration File for router (router.xml)

</interface>

</config>

Example:

IP Configuration File for forensicServer (forensicServer.xml)

</interface>

</config>

Implement Forensic Server Logic

The forensic server’s performance, implement a request that logs network traffic and study it for anomalies.

Example:

Forensic Server Application (Pseudo-Code)

#include <omnetpp.h>

#include <inet/applications/udpapp/UdpBasicApp.h>

#include <fstream>

using namespace omnetpp;

using namespace inet;

class ForensicServerApp : public UdpBasicApp

{

protected:

std::ofstream logFile;

virtual void initialize(int stage) override;

virtual void handleMessageWhenUp(cMessage *msg) override;

void logTraffic(cMessage *msg);

void analyzeTraffic();

};

Define_Module(ForensicServerApp);

void ForensicServerApp::initialize(int stage) {

UdpBasicApp::initialize(stage);

if (stage == INITSTAGE_APPLICATION_LAYER) {

logFile.open(“traffic_log.txt”);

}

void ForensicServerApp::handleMessageWhenUp(cMessage *msg) {

logTraffic(msg);

UdpBasicApp::handleMessageWhenUp(msg);

analyzeTraffic();

}

void ForensicServerApp::logTraffic(cMessage *msg) {

// Log the packet details to a file

logFile << “Received packet: ” << msg->getName() << ” at ” << simTime() << “\n”;

}

void ForensicServerApp::analyzeTraffic() {

// Implement traffic analysis logic

// Example: detect high traffic volume

}

Implement Logging and Analysis on Hosts

The hosts can also log specific procedures and send logs to the forensic server.

Example:

Host Application with Logging (Pseudo-Code)

#include <omnetpp.h>

#include <inet/applications/udpapp/UdpBasicApp.h>

using namespace omnetpp;

using namespace inet;

class LoggingHostApp : public UdpBasicApp

{

protected:

std::ofstream logFile;

virtual void initialize(int stage) override;

virtual void handleMessageWhenUp(cMessage *msg) override;

void logEvent(const std::string &event);

};

Define_Module(LoggingHostApp);

void LoggingHostApp::initialize(int stage) {

UdpBasicApp::initialize(stage);

if (stage == INITSTAGE_APPLICATION_LAYER) {

logFile.open(“host_log.txt”);

}

void LoggingHostApp::handleMessageWhenUp(cMessage *msg) {

// Log specific events

logEvent(“Sending packet: ” + std::string(msg->getName()));

UdpBasicApp::handleMessageWhenUp(msg);

}

void LoggingHostApp::logEvent(const std::string &event) {

// Log the event details to a file

logFile << event << ” at ” << simTime() << “\n”;

}

Run the Simulation

Build the Project: Right-click on the project and choice Build Project.
Run the Simulation: Connect on the green play button in the OMNeT++ IDE to start the simulation.

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