Interesting tool Mausezahn packet gen

[fred]

Mausezahn is a fast traffic generator which allows you to send nearly every possible and impossible packet. Mausezahn can be used, for example, as a traffic generator to stress multicast networks, for penetration testing of firewalls and IDS, for simulating DoS attacks on networks, to find bugs in network software or appliances, for reconnaissance attacks using ping sweeps and port scans, or to test network behavior under strange circumstances. Mausezahn gives you full control over the network interface card and allows you to send any byte stream you want (even violating Ethernet rules).

Changes: IP options (general interface, as well as loose and strict source route) and ICM improvements (echo request/reply, unreachable) were added. The clock for the jitter-measurements was improved, so there are no artifacts when a host synchronizes with NTP-servers.

http://www.perihel.at/sec/mz/index.html