Mausezahn is a free fast traffic generator written in C which allows you to send nearly every possible and impossible packet. It is mainly used to test VoIP or multicast networks but also for security audits to check whether your systems are hardened enough for specific attacks.

Mausezahn can be used for example:

• As traffic generator (e. g. to stress multicast networks)
• To precisely measure jitter (delay variations) between two hosts (e. g. for VoIP-SLA verification)
• As didactical tool during a datacom lecture or for lab exercises
• For penetration testing of firewalls and IDS
• For DoS attacks on networks (for audit purposes of course)
• To find bugs in network software or appliances
• For reconnaissance attacks using ping sweeps and port scans
• To test network behaviour under strange circumstances (stress test, malformed packets, …)

…and more. Mausezahn is basically a versatile packet creation tool on the command line with a simple syntax and context help. It could also be used within (bash-) scripts to perform combination of tests.

Currently Mausezahn is only available for Linux platforms.

As of version 0.38, Mausezahn supports the following protocols:

• ARP
• BPDU or PVST
• CDP
• LLDP
• IP
• IGMP
• UDP
• TCP (stateless)
• ICMP (partly)
• DNS
• RTP optionally RX-mode for jitter measurements
• Syslog

Download: mz-0.40.tar.gz

ddosim is a tool that can be used in a laboratory environment to simulate a distributed denial of service (DDOS) attack against a target server. The test will show the capacity of the server to handle application specific DDOS attacks. ddosim simulates several zombie hosts (having random IP addresses) which create full TCP connections to the target server. After completing the connection, ddosim starts the conversation with the listening application (e.g. HTTP server).

ddosim is written in C++ and runs on Linux. Its current functionalities include:

• HTTP DDoS with valid requests
• HTTP DDoS with invalid requests (similar to a DC++ attack)
• SMTP DDoS
• TCP connection flood on random port

In order to simulate such an attack in a lab environment we need to setup a network like this:

Download : ddosim-0.2.tar.gz

More Info :
1) DDOSIM at Sourceforge
2) Application Layer DDoS Simulator