How to Begin Implement Network Security Level in NS3

To implement and analyze Network Security Level in NS3, we require expressing the performance metrics and devices that compute the security features such as encode, authentication, intrusion detection, and resistance to attacks. NS3, being a network simulator, offers a platform to replicate these devices and amount of efficiency.

Steps to Implement Network Security Level in NS3

1. Understand Network Security Levels

• Definition: The network security level suggest to the robustness for against the network threats and vulnerabilities. It contains metrics like:
  • Encryption Level: Strength of encode used for data confidentiality.
  • Authentication: Assure only authorized entities can be assigning the network.
  • Intrusion Detection: Finding the malicious behavior or intrusions.
  • Packet Integrity: Avoiding the data tampering.
  • Resistance to Attacks: How well the network weathers attacks like as DDoS or eavesdropping.

2. Set Up NS3 Simulation Environment

1. Install NS3:
   • Certify the NS3 is installed. Download it from the NS3 website.
2. Choose a Network Type:
   • Use wired or wireless network patterns, we need to replicate the reliant for security environment
3. Define Security Metrics:
   • Measure the security structures like as attack detection rate, false positives, encryption-decryption time, and checks the data integrity.

3. Select Security Mechanisms

1. Encryption:
   • Incorporate the external cryptography collection such as OpenSSL for encode and decode.
2. Authentication:
   • It replicates the mutual authentication using pre-shared keys or certificates.
3. Intrusion Detection:
   • Execute the simple basic intrusion detection system (IDS) for finding the abnormal behavior.
4. Attack Simulation:
   • Attacks replicates such as packet dropping, eavesdropping, or flooding for validate the security devices.

4. Implement Security Level Calculation

1. Define Security Levels:
   • Allocate the weights or scores for various security features based on their execution.
2. Measure Metrics:
   • Measure the metrics such as encodes duration, detection accuracy, or packet integrity.

Example: Simulating and Evaluating Network Security Levels

Example Script: Encryption and Attack Resistance in NS3

#include “ns3/core-module.h”

#include “ns3/network-module.h”

#include “ns3/internet-module.h”

#include “ns3/point-to-point-module.h”

#include “ns3/applications-module.h”

#include <openssl/aes.h>

using namespace ns3;

class SecurityLevelEvaluator {

public:

SecurityLevelEvaluator() : m_packetsEncrypted(0), m_packetsDropped(0) {}

void EncryptPacket(Ptr<Packet> packet) {

m_packetsEncrypted++;

NS_LOG_UNCOND(“Encrypting Packet: ” << packet->GetSize() << ” bytes.”);

// Simulate encryption time

Simulator::Schedule(MicroSeconds(10), &SecurityLevelEvaluator::LogEncryption, this);

}

void LogEncryption() {

NS_LOG_UNCOND(“Packet encrypted successfully.”);

}

void DetectAttack(Ptr<Packet> packet, bool isDropped) {

if (isDropped) {

m_packetsDropped++;

NS_LOG_UNCOND(“Potential attack detected: Packet dropped.”);

}

}

void CalculateSecurityLevel() {

double encryptionScore = (double)m_packetsEncrypted / (m_packetsEncrypted + m_packetsDropped);

NS_LOG_UNCOND(“Security Level (Encryption Score): ” << encryptionScore * 100 << “%”);

}

private:

uint32_t m_packetsEncrypted;

uint32_t m_packetsDropped;

};

int main(int argc, char *argv[]) {

CommandLine cmd;

cmd.Parse(argc, argv);

// Create nodes

NodeContainer nodes;

nodes.Create(2);

// Configure Point-to-Point link

PointToPointHelper pointToPoint;

pointToPoint.SetDeviceAttribute(“DataRate”, StringValue(“5Mbps”));

pointToPoint.SetChannelAttribute(“Delay”, StringValue(“2ms”));

NetDeviceContainer devices = pointToPoint.Install(nodes);

// Install Internet stack

InternetStackHelper stack;

stack.Install(nodes);

// Assign IP addresses

Ipv4AddressHelper address;

address.SetBase(“10.1.1.0”, “255.255.255.0”);

Ipv4InterfaceContainer interfaces = address.Assign(devices);

// Configure applications

uint16_t port = 9;

UdpEchoServerHelper server(port);

ApplicationContainer serverApp = server.Install(nodes.Get(1));

serverApp.Start(Seconds(1.0));

serverApp.Stop(Seconds(10.0));

UdpEchoClientHelper client(interfaces.GetAddress(1), port);

client.SetAttribute(“MaxPackets”, UintegerValue(100));

client.SetAttribute(“Interval”, TimeValue(MilliSeconds(100)));

client.SetAttribute(“PacketSize”, UintegerValue(1024));

ApplicationContainer clientApp = client.Install(nodes.Get(0));

clientApp.Start(Seconds(2.0));

clientApp.Stop(Seconds(10.0));

// Evaluate security

SecurityLevelEvaluator evaluator;

Simulator::Schedule(Seconds(3.0), &SecurityLevelEvaluator::EncryptPacket, &evaluator, Create<Packet>(1024));

Simulator::Schedule(Seconds(5.0), &SecurityLevelEvaluator::DetectAttack, &evaluator, Create<Packet>(1024), true);

Simulator::Schedule(Seconds(10.0), &SecurityLevelEvaluator::CalculateSecurityLevel, &evaluator);

Simulator::Run();

Simulator::Destroy();

return 0;

}

Explanation of the Script

1. Encryption:
   • It replicates the packet encode using a placeholder function.
   • It records the encode status and estimates the time overhead.
2. Attack Simulation:
   • It replicates the potential attack environment in which packets are stopped.
3. Security Level Calculation:
   • Computes a simple security score according to encode the success and attack finding.
4. Traffic Simulation:
   • Uses to make congestion UdpEchoClient and UdpEchoServer.

Steps to Run the Simulation

1. Build the script:

./waf –run “security-level-example”

1. Utilized their logs for encode actions, attack finding, and ending the security level score.

In the presented manual, we demonstrate the comprehensive procedures to computed and execute the Network security level that has key metrics, implementation procedures and sample snippets and summary were given to execute in ns3 tool. For further inquiries about this project, a separate manual will be provided.