How to Calculate Network Auditing in omnet++

To calculate the network auditing in OMNeT++ encompasses following and evaluating activities through the network to make certain compliance with security policies, find any anomalies, and maintain a record of network events. Network auditing is vital for checking that the network operates as stated by predefined policies and for detecting unauthorized activities.

Step-by-Step Implementations:

1. Understand Network Auditing

Network auditing encompasses systematically recording and examining several network events to:

• Ensure Compliance: Validate that network operations align with security policies and regulations.
• Detect Anomalies: Find suspicious activities that may specify security breaches.
• Maintain Logs: Maintain a detailed record of network activities for future reference.

2. Set up a Network with Auditing Points

Make a network topology where auditing points like firewalls, routers, or dedicated auditing modules observe and log network events. These points will be responsible for gathering data essential for auditing.

Example: Define a Network with Auditing Points in NED

network AuditingNetwork {

submodules:

client: Client;

firewall: AuditingFirewall;  // Firewall with auditing capabilities

server: Server;

connections:

client.out++ –> firewall.in++;

firewall.out++ –> server.in++;

}

3. Implement Auditing Logic

Denoting the auditing point like a firewall, execute the logic to capture and log related events, such as access attempts, data transfers, and policy violations in the OMNeT++ module.

Example: Implementing Auditing in a Firewall

#include <omnetpp.h>

using namespace omnetpp;

class AuditingFirewall : public cSimpleModule {

private:

int accessAttempts = 0;

int blockedAttempts = 0;

int allowedAttempts = 0;

std::ofstream auditLogFile;

protected:

virtual void initialize() override {

// Open an audit log file to store the audit records

auditLogFile.open(“audit_log.txt”);

}

virtual void handleMessage(cMessage *msg) override {

accessAttempts++;

// Log the access attempt

logAuditEvent(msg, “Access attempt”);

// Apply access control policies

if (isAllowed(msg)) {

allowedAttempts++;

send(msg, “out”);  // Allow access

logAuditEvent(msg, “Access allowed”);

} else {

blockedAttempts++;

delete msg;  // Block access

logAuditEvent(msg, “Access blocked”);

}

}

bool isAllowed(cMessage *msg) {

// Implement your access control policies here

// Example: Allow only certain types of traffic

return strcmp(msg->getName(), “authorizedRequest”) == 0;

}

void logAuditEvent(cMessage *msg, const char *eventDescription) {

// Get the simulation time and the module’s name

simtime_t currentTime = simTime();

const char *moduleName = getFullPath().c_str();

// Log the event to the audit log file

auditLogFile << currentTime << ” – ” << moduleName << ” – ” << eventDescription << “: ” << msg->getName() << std::endl;

// Optionally, log to the simulation output

EV << currentTime << ” – ” << moduleName << ” – ” << eventDescription << “: ” << msg->getName() << std::endl;

}

virtual void finish() override {

// Record audit statistics

recordScalar(“Access Attempts”, accessAttempts);

recordScalar(“Blocked Attempts”, blockedAttempts);

recordScalar(“Allowed Attempts”, allowedAttempts);

// Close the audit log file at the end of the simulation

auditLogFile.close();

}

};

Define_Module(AuditingFirewall);

4. Simulate Traffic and Audit Events

Create traffic from the client to the server over the auditing firewall. The firewall will audit each access attempt, logging whether it was permitted or blocked along with the predefined rules.

Example: Traffic Simulation with Auditing

class Client : public cSimpleModule {

protected:

virtual void initialize() override {

// Start generating both authorized and unauthorized requests

scheduleAt(simTime() + par(“sendInterval”).doubleValue(), new cMessage(“authorizedRequest”));

scheduleAt(simTime() + par(“sendInterval”).doubleValue() + 1, new cMessage(“unauthorizedRequest”));

}

virtual void handleMessage(cMessage *msg) override {

// Send the request to the firewall for auditing

send(msg, “out”);

}

};

5. Monitor and Analyse Audit Logs

The logs made by the auditing points can be analysed to know network behaviour, make sure compliance, and detect any anomalies. After the simulation, logs can be managed in real-time or reviewed

Example: Analysing Audit Logs

The audit log file audit_log.txt will encompass complete records of all audited events after the simulation. We can review this file to analyse:

• Compliance Verification: Make sure that all access attempts align with network policies.
• Anomaly Detection: Find any unauthorized or suspicious activities.
• Audit Trail: Keep a detailed record of all network activities for future reference.

6. Advanced Auditing Features

For more complete auditing, we may want to include :

• Implement Real-Time Auditing: Observe and respond to events as they happen, possibly triggering alerts.
• Simulate Multi-Level Auditing: Execute auditing at numerous layers, like application-level, network-level, and system-level auditing.
• Implement Centralized Auditing: Gather logs from several auditing points and aggregate them in a central audit server for easier analysis and correlation.

7. Example Scenario

In this example, the AuditingFirewall module logs every access attempt, whether allowed or blocked. The logs contain the module name, simulation time, and a description of the event. This audit logs are written to both a file and the simulation output.

network AuditingExample {

submodules:

client: Client;

firewall: AuditingFirewall;

server: cModule;

connections:

client.out++ –> firewall.in++;

firewall.out++ –> server.in++;

}

8. Post-Simulation Audit Analysis

To observe the recorded audit logs, like the number of allowed attempts, access attempts, and blocked attempts by using OMNeT++’s built-in analysis tools. This analysis will support validate compliance with network policies, detect anomalies, and make sure the security and integrity of the network.

In this paper, we are explained about Network Auditing and the process to calculate it in OMNeT++ tool. Additional details will offer as per your needs. Provide us with your parameter details, and we will assist you with your Network Auditing using the OMNeT++ tool for your project. We have the necessary tools and a skilled team of developers to ensure the successful completion of your work. We carry o simulation performance for your parameters.