To implement the network threats in ns3 needs to setup a network simulation scenario then inject the numerous types of network threats and then measure the traffic patterns and characteristics to identify the threats. Get best implementation support for your work from us.
The given below is the brief procedures on how to implement the network threat analysis in ns3:
Step-by-Step Implementation:
Step 1: Set Up ns3 Environment
- Install ns3: Install and download ns3 in the system.
- Familiarize yourself with ns3: Read through the ns3 tutorial to understand the basic concepts and structure of ns3 simulations.
Step 2: Define the Network Topology
- Create a Simple Network: Outline a basic network topology using ns3 and we need to conclude the creating nodes, setting up channels, and configuring IP addresses.
#include “ns3/core-module.h”
#include “ns3/network-module.h”
#include “ns3/internet-module.h”
#include “ns3/point-to-point-module.h”
using namespace ns3;
int main(int argc, char *argv[]) {
NodeContainer nodes;
nodes.Create(4); // Example: 4 nodes (1 server, 2 clients, 1 potential attacker)
PointToPointHelper pointToPoint;
pointToPoint.SetDeviceAttribute(“DataRate”, StringValue(“5Mbps”));
pointToPoint.SetChannelAttribute(“Delay”, StringValue(“2ms”));
NetDeviceContainer devices;
devices = pointToPoint.Install(nodes);
InternetStackHelper stack;
stack.Install(nodes);
Ipv4AddressHelper address;
address.SetBase(“10.1.1.0”, “255.255.255.0”);
Ipv4InterfaceContainer interfaces = address.Assign(devices);
Simulator::Run();
Simulator::Destroy();
return 0;
}
Step 3: Implement Threat Analysis Mechanism
- Create Threat Analysis Application: to optimize the application or module that observer’s network traffic and measure it to identify numerous threats based on predefined criteria or anomaly detection algorithms.
class ThreatAnalysisApp : public Application {
public:
ThreatAnalysisApp() {}
virtual ~ThreatAnalysisApp() {}
void SetAnalysisCriteria(std::function<void(Ptr<const Packet>, Ptr<Ipv4> ipv4)> criteria) {
m_criteria = criteria;
}
private:
virtual void StartApplication() {
// Schedule the first packet inspection
Simulator::Schedule(Seconds(1.0), &ThreatAnalysisApp::AnalyzeTraffic, this);
}
virtual void StopApplication() {
// Teardown code
}
void AnalyzeTraffic() {
Ptr<Ipv4> ipv4 = GetNode()->GetObject<Ipv4>();
for (uint32_t i = 0; i < ipv4->GetNInterfaces(); ++i) {
for (uint32_t j = 0; j < ipv4->GetNAddresses(i); ++j) {
Ipv4InterfaceAddress addr = ipv4->GetAddress(i, j);
Ptr<Packet> packet = Create<Packet>(1024); // Example packet inspection
m_criteria(packet, ipv4);
}
}
// Reschedule the next inspection
Simulator::Schedule(Seconds(1.0), &ThreatAnalysisApp::AnalyzeTraffic, this);
}
std::function<void(Ptr<const Packet>, Ptr<Ipv4> ipv4)> m_criteria;
};
Integrate Threat Analysis Logic: Describe the logic for investigating traffic to discover numerous threats. This could involve analysing traffic patterns, packet sizes, or other criteria.
Ptr<ThreatAnalysisApp> analysisApp = CreateObject<ThreatAnalysisApp>();
analysisApp->SetAnalysisCriteria([](Ptr<const Packet> packet, Ptr<Ipv4> ipv4) {
// Define analysis logic for various threats
Ipv4Header ipv4Header;
packet->PeekHeader(ipv4Header);
Ipv4Address srcAddress = ipv4Header.GetSource();
// Example criteria for detecting different types of threats
if (srcAddress == Ipv4Address(“10.1.1.3”)) {
// Detected a potential DoS attack from node 3
std::cout << “Detected DoS attack from ” << srcAddress << std::endl;
} else if (packet->GetSize() > 1500) {
// Detected a potential data exfiltration attack
std::cout << “Detected data exfiltration attack” << std::endl;
} else if (srcAddress == Ipv4Address(“10.1.1.2”)) {
// Detected a potential scanning attack from node 2
std::cout << “Detected scanning attack from ” << srcAddress << std::endl;
}
});
Ptr<Node> serverNode = nodes.Get(0); // Example: Server node
serverNode->AddApplication(analysisApp);
Step 4: Simulate Different Types of Threats
- Create DoS Attack Simulation: Improve an application that simulates a Denial of Service (DoS) attack.
class DoSAttackApp : public Application {
public:
DoSAttackApp() {}
virtual ~DoSAttackApp() {}
private:
virtual void StartApplication() {
// Schedule the first attack activity
Simulator::Schedule(Seconds(1.0), &DoSAttackApp::LaunchAttack, this);
}
virtual void StopApplication() {
// Teardown code
}
void LaunchAttack() {
Ptr<Packet> packet = Create<Packet>(1024); // Example DoS packet
// Simulate DoS attack (e.g., send packets to the server node)
// Reschedule attack activity
Simulator::Schedule(Seconds(0.1), &DoSAttackApp::LaunchAttack, this);
}
};
Ptr<DoSAttackApp> dosAttackApp = CreateObject<DoSAttackApp>();
Ptr<Node> attackerNode1 = nodes.Get(3); // Example: Attacker node
attackerNode1->AddApplication(dosAttackApp);
dosAttackApp->SetStartTime(Seconds(2.0));
dosAttackApp->SetStopTime(Seconds(10.0));
Create Data Exfiltration Simulation: Improve an application that mimics data exfiltration behavior.
class DataExfiltrationApp : public Application {
public:
DataExfiltrationApp() {}
virtual ~DataExfiltrationApp() {}
private:
virtual void StartApplication() {
// Schedule the first exfiltration activity
Simulator::Schedule(Seconds(1.0), &DataExfiltrationApp::ExfiltrateData, this);
}
virtual void StopApplication() {
// Teardown code
}
void ExfiltrateData() {
Ptr<Packet> packet = Create<Packet>(2048); // Example exfiltration packet
// Simulate data exfiltration (e.g., send large packet to external server)
// Reschedule exfiltration activity
Simulator::Schedule(Seconds(0.5), &DataExfiltrationApp::ExfiltrateData, this);
}
};
Ptr<DataExfiltrationApp> exfiltrationApp = CreateObject<DataExfiltrationApp>();
Ptr<Node> attackerNode2 = nodes.Get(2); // Example: Attacker node
attackerNode2->AddApplication(exfiltrationApp);
exfiltrationApp->SetStartTime(Seconds(2.0));
exfiltrationApp->SetStopTime(Seconds(10.0));
Create Scanning Attack Simulation: Optimize an application that simulates a network scanning attack.
class ScanningAttackApp : public Application {
public:
ScanningAttackApp() {}
virtual ~ScanningAttackApp() {}
private:
virtual void StartApplication() {
// Schedule the first scanning activity
Simulator::Schedule(Seconds(1.0), &ScanningAttackApp::ScanNetwork, this);
}
virtual void StopApplication() {
// Teardown code
}
void ScanNetwork() {
Ptr<Packet> packet = Create<Packet>(512); // Example scanning packet
// Simulate network scanning (e.g., send packets to different addresses)
// Reschedule scanning activity
Simulator::Schedule(Seconds(0.2), &ScanningAttackApp::ScanNetwork, this);
}
};
Ptr<ScanningAttackApp> scanningApp = CreateObject<ScanningAttackApp>();
Ptr<Node> attackerNode3 = nodes.Get(1); // Example: Attacker node
attackerNode3->AddApplication(scanningApp);
scanningApp->SetStartTime(Seconds(2.0));
scanningApp->SetStopTime(Seconds(10.0));
Step 5: Run the Simulation and Analyze Results
- Run the Simulation: Run the simulation to observe the behaviour of the threat analysis mechanism and the impact of diverse types of threats.
analysisApp->SetStartTime(Seconds(2.0));
analysisApp->SetStopTime(Seconds(10.0));
Simulator::Run();
Simulator::Destroy();
- Collect Metrics: Gather relevant metrics to assess the performance of threat analysis system, like the number of detected threats, false positives, and false negatives.
- Visualize Results: Use tools like Gnuplot or Python’s Matplotlib to visualize the simulation results and analyse the effectiveness of your threat analysis mechanism.
In this script, we had completely learnt and understand about how the network threats will successfully implemented and evaluated in ns3 tool. Also we provide the further support related to network threats.