Nemesis – Packet Injection Suite


Nemesis is a command-line network packet crafting and injection utility for UNIX-like and Windows systems. Nemesis, is well suited for testing Network Intrusion Detection Systems, firewalls, IP stacks and a variety of other tasks. As a command-line driven utility, Nemesis is perfect for automation and scripting.

Nemesis can natively craft and inject packets for:

  • ARP
  • DNS
  • ETHERNET
  • ICMP
  • IGMP
  • IP
  • OSPF
  • RIP
  • TCP
  • UDP

Using the IP and the Ethernet injection modes, almost any custom packet can be crafted and injected.

Unix-like systems require: libnet-1.0.2a, and a C compiler (GCC)
Windows systems require: libnetNT-1.0.2g and WinPcap

Download it here:

Source code: nemesis-1.4.tar.gz (Build 26)
Windows binary: nemesis-1.4.zip (Build 26) (includes LibnetNT)

You can read more here:

Nemisis at Sourceforge

Posted in: Hacking Tools, Linux Hacking, Networking Hacking Tools, Windows Hacking

, ,


Latest Posts:


GKE Auditor - Detect Google Kubernetes Engine Misconfigurations GKE Auditor – Detect Google Kubernetes Engine Misconfigurations
GKE Auditor is a Java-based tool to detect Google Kubernetes Engine misconfigurations, it aims to help security & dev teams streamline the configuration process
zANTI - Android Wireless Hacking Tool Free Download zANTI – Android Wireless Hacking Tool Free Download
zANTI is an Android Wireless Hacking Tool that functions as a mobile penetration testing toolkit that lets you assess the risk level of a network using mobile.
HELK - Open Source Threat Hunting Platform HELK – Open Source Threat Hunting Platform
The Hunting ELK or simply the HELK is an Open-Source Threat Hunting Platform with advanced analytics capabilities such as SQL declarative language, graphing etc
trape - OSINT Analysis Tool For People Tracking Trape – OSINT Analysis Tool For People Tracking
Trape is an OSINT analysis tool, which allows people to track and execute intelligent social engineering attacks in real-time.
Fuzzilli - JavaScript Engine Fuzzing Library Fuzzilli – JavaScript Engine Fuzzing Library
Fuzzilii is a JavaScript engine fuzzing library, it's a coverage-guided fuzzer for dynamic language interpreters based on a custom intermediate language.
OWASP APICheck - HTTP API DevSecOps Toolset OWASP APICheck – HTTP API DevSecOps Toolset
APICheck is an HTTP API DevSecOps toolset, it integrates existing tools, creates execution chains easily and is designed for integration with 3rd parties.


3 Responses to Nemesis – Packet Injection Suite

  1. yzan June 3, 2007 at 11:01 am #

    In the title and tags should be Nemesis rather than Nemisis.

  2. Darknet June 3, 2007 at 6:19 pm #

    yzan: Thanks for the correction!

  3. Hanashi June 3, 2007 at 6:59 pm #

    I’ve used Nemesis in the past, while teaching an IDS class. It’s a pretty good tool for creating arbitrary packets. I usually set up whatever header and payload the students need to detect, then just run it in a shell loop so it sends the same packets over and over. Works like a charm, and it’s pretty simple to get going.