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 either WinPcap-2.3 or WinPcap-3.0

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,Network Hacking,Windows Hacking