How to Start Internet Attacks Projects Using NS2

To create an internet attack projects using NS2 (Network Simulator 2) has includes the strong recognizing for the kind of internet attack we need to replicate the DoS/DDoS, Man-in-the-Middle (MITM), eavesdropping, packet sniffing, or spoofing. Here’s a step-by-step guide to get you started:

Steps to Start Internet Attacks Projects Using NS2

  1. Choose the Type of Attack
  • Choose the attack we require to replicate:
    • Denial of Service (DoS)/DDoS: It goal of flood by extreme congestion.
    • Man-in-the-Middle (MITM): Interrupt and change the congestion among two nodes.
    • Spoofing: Forge packets for mimic another node.
    • Packet Sniffing: Seizure the packets deprived of changing sniffing.
    • Routing Attacks: Interrupt the routing protocols for instance blackhole or wormhole attacks.
  1. Set up NS2 Environment
  • Connect NS2 and assure it is operates:

sudo apt-get install ns2

  • Validate the installation by a basic script:

ns example.tcl

  1. Define Network Topology
  • We generate a TCL script for model the network topology.
  • It contains the legitimate nodes and attacker nodes in the topology.
  • Example topology:
    • Victim node (n1)
    • Attacker node (n2)
    • Legitimate users (n3, n4)
  1. Implement the Attack

Example Attack Implementations:

  1. DoS/DDoS Attack
  1. Enhance the node for create a high volume of packets aimed in the victim.
  2. Use the UDP or TCP agent by constant packet generation.
  3. TCL sample for DoS:

set ns [new Simulator]

set tracefile [open out.tr w]

$ns trace-all $tracefile

 

# Create nodes

set n1 [$ns node]  # Victim

set n2 [$ns node]  # Attacker

 

# Links

$ns duplex-link $n1 $n2 1Mb 10ms DropTail

 

# UDP attack traffic

set udp [new Agent/UDP]

$ns attach-agent $n2 $udp

set null [new Agent/Null]

$ns attach-agent $n1 $null

$ns connect $udp $null

 

# Set CBR traffic to overload victim

set cbr [new Application/Traffic/CBR]

$cbr set packetSize_ 512

$cbr set interval_ 0.01

$cbr attach-agent $udp

 

# Start and stop times

$ns at 1.0 “$cbr start”

$ns at 5.0 “$cbr stop”

  1. Man-in-the-Middle Attack (MITM)
  1. Enhance the attacker node among two communicating nodes.
  2. Interrupt the packets, log them, and optionally change already forwarding.
  3. Modify C++ code to simulate packet interception.
  1. Modify NS2 Core Code (Optional)
  • For advanced attacks, alter NS2’s C++ key files.
  • Example: Interrupt the packets in the recv() function.

void MITMNode::recv(Packet* p) {

logPacket(p); // Log intercepted packets

modifyPacket(p); // Modify packet content (if needed)

forwardPacket(p); // Forward packet to the destination

}

  1. Analyze Results
  • Use the trace file created through NS2 for examine the effect of the attack.
  • Filter specific packet types:

awk ‘/tcp/ && /drop/’ out.tr > dos_attack.log

  • Examine the parameter metrics:
    • Throughput: It reduced the victim’s throughput.
    • Latency: Due to the attack for improved the delay.
  1. Simulate Defense Mechanisms (Optional)
  • Execute the countermeasures such as intrusion detection, encryption, or anomaly-based monitoring.
  • It replicates the secure protocol for test and its efficiency for against the attack.
  1. Document Your Simulation
  • It specific the attack mechanism, simulation setting, outcomes, and analysis.
  • Highlight on how this replication contributes to understanding network vulnerabilities.

Tools and Resources:

  • Wireshark: Examine the trace files for packet-level understandings.
  • Gnuplot: Envision for attack effects such as throughput and latency variations.
  • NS2 Add-ons: Encompass the NS2 tool by protocols for advanced attacks for sample AODV or DSDV modifications.

Example Defense Mechanism Integration:

# Intrusion detection simulation

set ids [new IDS]

$ids monitor $n1 $n2

$ids set threshold_ 1000

$ids set action_ “block”

In the presented manual, we demonstrate the comprehensive procedures to implement and execute the Internet Attacks that has implementation procedures explanation and sample snippets were given to execute in ns2 tool. For queries about the project, consult the other manual we will provide.