How to Implement internet attacks in ns3

To implement internet attacks in ns3, we have to simulate a network where an attacker node disrupts or intercepts communications between legitimate nodes. Also, we provide more related coding on internet attacks.

Here are the steps to implement a simple Distributed Denial of Service (DDoS) attack, which is a common type of internet attack.

Steps for implementation

1. Set up your ns3 :

• Make sure that ns3 is installed in the computer. If not, install it.

2. Create a new ns3 script :

• In the scratch directory of ns3, create a new script.

3. Include necessary libraries :

• In your script, include the necessary libraries.

4. Define network topology :

• For your network topology, create multiple attacker nodes and one victim node.

5. Implement the DDoS redirect logic :

• Use raw sockets to send a flood of packets from the attacker node to the victim node.

6. Enable packet capturing :

• Enable pcap tracing to capture packets for analysis with Wireshark.

7. Run the Simulation :

• Define the simulation parameters and run it.

Example for implementing a DDoS attack

Here is the example for the implementation of DDoS :

#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 “ns3/flow-monitor-module.h”

using namespace ns3;

NS_LOG_COMPONENT_DEFINE (“DdosAttackExample”);

void SendFlood (Ptr<Node> attacker, Ipv4Address victimAddress, uint16_t port)

{

Ptr<Socket> socket = Socket::CreateSocket (attacker, TypeId::LookupByName (“ns3::UdpSocketFactory”));

InetSocketAddress remote = InetSocketAddress (victimAddress, port);

socket->Connect (remote);

Ptr<Packet> packet = Create<Packet> (1024); // Create a packet of 1024 bytes

for (int i = 0; i < 100; ++i) // Send 100 packets in a loop

{

socket->Send (packet);

Simulator::Schedule (Seconds (0.1), &SendFlood, attacker, victimAddress, port); // Continue sending packets

}

}

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

{

bool verbose = true;

uint32_t nAttackers = 3; // Number of attacker nodes

CommandLine cmd;

cmd.AddValue (“nAttackers”, “Number of attacker nodes”, nAttackers);

cmd.AddValue (“verbose”, “Tell echo applications to log if true”, verbose);

cmd.Parse (argc, argv);

if (verbose)

{

LogComponentEnable (“DdosAttackExample”, LOG_LEVEL_INFO);

}

NodeContainer nodes;

nodes.Create (nAttackers + 1); // nAttackers + 1 victim node

NodeContainer attackers;

for (uint32_t i = 0; i < nAttackers; ++i)

{

attackers.Add (nodes.Get (i));

}

Ptr<Node> victim = nodes.Get (nAttackers);

PointToPointHelper pointToPoint;

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

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

NetDeviceContainer devices;

for (uint32_t i = 0; i < nodes.GetN () – 1; ++i)

{

devices.Add (pointToPoint.Install (nodes.Get (i), nodes.Get (i + 1)));

}

InternetStackHelper stack;

stack.Install (nodes);

Ipv4AddressHelper address;

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

Ipv4InterfaceContainer interfaces = address.Assign (devices);

UdpEchoServerHelper echoServer (9);

ApplicationContainer serverApps = echoServer.Install (victim);

serverApps.Start (Seconds (1.0));

serverApps.Stop (Seconds (10.0));

for (uint32_t i = 0; i < attackers.GetN (); ++i)

{

Simulator::Schedule (Seconds (2.0), &SendFlood, attackers.Get (i), interfaces.GetAddress (nodes.GetN () – 1), 9);

}

pointToPoint.EnablePcapAll (“ddos_attack”);

Simulator::Run ();

Simulator::Destroy ();

return 0;

}

Explanation

1. Nodes and links :

Nodes are created : multiple attacker nodes and one victim node. Point-to-point links between nodes are configured.

2. Applications :

On one of the victim nodes, a UDP echo server is installed and implemented a SendFlood function to create and send a flood of UDP packets from attacker nodes to the victim node.

3. Packet Capture :

To capture the traffic for analysis with Wireshark, pcap tracing on all nodes is enabled.

4. Running the Simulation :

The simulation runs with attacker nodes sending a flood of UDP packets to the victim node, and the traffic is captured in pcap files.

Overall, we had successfully implemented internet attacks in ns3 by simulating a network where an attacker node disrupts or intercepts communications between legitimate nodes. Performance Analysis on Distributed Denial of Service (DDoS) attack are offered by us for you, so connect with ns3simulation.com.