Nemesis – Packet Injection Suite

Outsmart Malicious Hackers


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, Windows Hacking

, ,


Latest Posts:


StaCoAn - Mobile App Static Analysis Tool StaCoAn – Mobile App Static Analysis Tool
StaCoAn is a cross-platform tool which aids developers, bug bounty hunters and ethical hackers performing mobile app static analysis on the code of the application for both native Android and iOS applications.
snallygaster - Scan For Secret Files On HTTP Servers snallygaster – Scan For Secret Files On HTTP Servers
snallygaster is a Python-based tool that can help you to scan for secret files on HTTP servers, files that are accessible that shouldn't be public and can pose a s
Portspoof - Spoof All Ports Open & Emulate Valid Services Portspoof – Spoof All Ports Open & Emulate Valid Services
The primary goal of the Portspoof program is to enhance your system security through a set of new camouflage techniques which spoof all ports open and also emulate valid services on every port.
Cambridge Analytica Facebook Data Scandal Cambridge Analytica Facebook Data Scandal
One of the biggest stories of the year so far has been the scandal surrounding Cambridge Analytica that came out after a Channel 4 expose that demonstrated the depths they are willing to go to profile voters, manipulate elections and much more.
GetAltName - Discover Sub-Domains From SSL Certificates GetAltName – Discover Sub-Domains From SSL Certificates
GetAltName it's a little script to discover sub-domains that can extract Subject Alt Names for SSL Certificates directly from HTTPS websites which can provide you with DNS names or virtual servers.
Memcrashed - Memcached DDoS Exploit Tool Memcrashed – Memcached DDoS Exploit Tool
Memcrashed is a Memcached DDoS exploit tool written in Python that allows you to send forged UDP packets to a list of Memcached servers obtained from Shodan.


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.