To implement the Next Generation Firewalls (NGFW) in ns3 has encompasses to emulate the network scenarios where the firewall will verify and filter traffic based on advanced conditions like application awareness, intrusion prevention, and deep packet inspection. The given below are the brief procedures on how to implement the next generation firewalls in ns3:
Step-by-Step Implementation:
- Setup ns3 Environment
Make sure ns3 is installed in the system.
- Define the Network Topology
Generate a network topology that contains a firewall node among the internal network and the external network.
#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”
using namespace ns3;
int main(int argc, char *argv[]) {
NodeContainer nodes;
nodes.Create(4); // 1 for client, 1 for firewall, 1 for server, 1 for attacker
PointToPointHelper pointToPoint;
pointToPoint.SetDeviceAttribute(“DataRate”, StringValue(“10Mbps”));
pointToPoint.SetChannelAttribute(“Delay”, StringValue(“2ms”));
NetDeviceContainer devices;
devices = pointToPoint.Install(nodes.Get(0), nodes.Get(1)); // Client to firewall
devices.Add(pointToPoint.Install(nodes.Get(1), nodes.Get(2))); // Firewall to server
devices.Add(pointToPoint.Install(nodes.Get(1), nodes.Get(3))); // Firewall to attacker
InternetStackHelper stack;
stack.Install(nodes);
Ipv4AddressHelper address;
address.SetBase(“10.1.1.0”, “255.255.255.0”);
Ipv4InterfaceContainer interfaces = address.Assign(devices);
// Other network setup code
Simulator::Run();
Simulator::Destroy();
return 0;
}
- Implement the Next Generation Firewall Application
Generate the application that emulates the NGFW functionalities that encompass deep packet inspection, intrusion prevention, and application awareness.
class NgfwApp : public Application {
public:
NgfwApp() {}
virtual ~NgfwApp() {}
void Setup(Ptr<Socket> socket) {
m_socket = socket;
}
private:
virtual void StartApplication(void) {
m_socket->Bind();
m_socket->Listen();
m_socket->SetRecvCallback(MakeCallback(&NgfwApp::HandleRead, this));
}
virtual void StopApplication(void) {
m_socket->Close();
}
void HandleRead(Ptr<Socket> socket) {
Ptr<Packet> packet;
Address from;
while ((packet = socket->RecvFrom(from))) {
uint8_t buffer[1024];
packet->CopyData(buffer, packet->GetSize());
std::string data = std::string((char*)buffer, packet->GetSize());
if (InspectPacket(data)) {
// Forward packet
Ptr<Packet> newPacket = Create<Packet>((uint8_t*)data.c_str(), data.size());
m_socket->SendTo(newPacket, 0, from);
} else {
// Drop packet
}
}
}
bool InspectPacket(const std::string &data) {
// Implement deep packet inspection and intrusion prevention logic
if (data.find(“malicious”) != std::string::npos) {
return false; // Drop malicious packets
}
return true; // Allow legitimate packets
}
Ptr<Socket> m_socket;
};
Ptr<Socket> ngfwSocket = Socket::CreateSocket(nodes.Get(1), TcpSocketFactory::GetTypeId());
Ptr<NgfwApp> ngfwApp = CreateObject<NgfwApp>();
ngfwApp->Setup(ngfwSocket);
nodes.Get(1)->AddApplication(ngfwApp);
ngfwApp->SetStartTime(Seconds(0.0));
ngfwApp->SetStopTime(Seconds(20.0));
- Implement Security Policies
Describe security policies that the NGFW will enforce, like permitting or blocking particular kinds of traffic.
bool NgfwApp::InspectPacket(const std::string &data) {
// Example security policies
if (data.find(“blocked_application”) != std::string::npos) {
return false; // Block packets from a specific application
}
if (data.find(“malicious”) != std::string::npos) {
return false; // Block packets containing malicious content
}
return true; // Allow legitimate packets
}
- Monitor and Analyze Traffic
Use ns3’s tracing capabilities to monitor and examine network traffic to guarantee the NGFW is working as expected.
AsciiTraceHelper ascii;
pointToPoint.EnableAsciiAll(ascii.CreateFileStream(“ngfw-security.tr”));
pointToPoint.EnablePcapAll(“ngfw-security”);
Ptr<FlowMonitor> flowMonitor;
FlowMonitorHelper flowHelper;
flowMonitor = flowHelper.InstallAll();
- Run the Simulation
Compile and run the simulation to observe the performance and impact of the implemented NGFW.
./waf configure
./waf build
./waf –run your-simulation-script
- Analyse Results
Post-process the generated trace and pcap files to analyse the efficiency of the NGFW. Tools such as Wireshark can be used for pcap analysis, and ns3’s flow monitor can be used for traffic analysis.
Finally we discussed and provide all kinds of information about the Next Generation Firewalls in ns3 tool and additionally we support and deliver the information of Next Generation Firewalls.
If you’re looking to implement Next Generation Firewalls in the ns3 program, we’ve got you covered with a full guide and a quick overview. Share your project details with us for extra support. To ensure your project runs smoothly with features like application awareness, intrusion prevention, and deep packet inspection, feel free to reach out for more thesis topics!