How to Implement Network Virtualized Security in ns3

To implement the network virtualized in ns3 has numerous steps. We will provide the simple and basic outline to start the process. This is a high level procedure and we need to refer further ns3 documentation or other resources for detailed instructions. Here we provide the brief procedures on how to implement the network virtualized security in ns3:

Step-by-Step Implementation:

Step 1: Setup ns3 Environment

1. Install ns3: Install and download the ns3 in the system.
2. 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

1. Create a Simple Network: Describe the simple network topology using ns3 and contains to 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(2);

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 Virtualized Network Functions (VNFs)

1. Create VNFs: The Virtualized Network Functions (VNFs) like firewalls, IDS/IPS, or VPN gateways has to be executed. This can be completed by generating applications or modules in ns3 that emulate these functions. For example, a basic firewall could be implemented as an application that filters packets based on certain criteria.
2. Integrate VNFs with Network Topology: In the network we need to attach the VNF for particular nodes. For instance, we need to place a firewall on a router node that inspects and filters traffic among various segments of the network.

class SimpleFirewall : public Application {

public:

SimpleFirewall() {}

virtual ~SimpleFirewall() {}

void SetFilterCondition(std::function<bool(Ptr<const Packet>)> filter) {

m_filter = filter;

}

private:

virtual void StartApplication() {

// Setup code

}

virtual void StopApplication() {

// Teardown code

}

void FilterPackets(Ptr<const Packet> packet) {

if (m_filter(packet)) {

// Drop packet or perform some action

}

}

std::function<bool(Ptr<const Packet>)> m_filter;

};

Step 4: Configure and Run the Simulation

1. Configure Security Policies: Describe the security policies for your VNFs. For instance, specify which packets should be permitted or blocked by the firewall.

Ptr<SimpleFirewall> firewall = CreateObject<SimpleFirewall>();

firewall->SetFilterCondition([](Ptr<const Packet> packet) {

// Define filtering logic

return true; // Drop all packets for demonstration

});

Run the Simulation: Add your VNFs to the simulation, configure the required settings, and run the simulation to observe the behaviour of your virtualized security functions.

Simulator::Schedule(Seconds(1.0), &SimpleFirewall::FilterPackets, firewall, packet);

Simulator::Run();

Simulator::Destroy();

Step 5: Analyse and Visualize Results

1. Collect Metrics: Gather relevant metrics to estimate the performance of your security functions, like packet drop rates, latency, and throughput.
2. Visualize Results: Use tools like Gnuplot or Python’s Matplotlib to visualize the simulation results and analyse the effectiveness of your network virtualized security setup.

As we discussed earlier about how the network virtualized will perform in ns3 implementation tool and we help to provide further information about how the network virtualized will adapt in various simulation. We handle the implementation of Network Virtualized Security in ns3tool and provide guidance on how to use this tool for your projects on trending topics. Let us help you with project ideas and performance analysis!