hping

Network Utilities Packet Analysis Packet Crafting

hping is a command-line oriented TCP/IP packet assembler/analyzer. The interface is inspired to the ping(8) unix command, but hping isn't only able to send ICMP echo requests. It supports TCP, UDP, ICMP and RAW-IP protocols, has a traceroute mode, the ability to send files between a covered channel, and many other features. While hping was mainly used as a security tool in the past, it can be used in many ways by people that don't care about security to test networks and hosts. A subset of the stuff you can do using hping: * Firewall testing * Advanced port scanning * Network testing, using different protocols, TOS, fragmentation * Manual path MTU discovery * Advanced traceroute, under all the supported protocols * Remote OS fingerprinting * Remote uptime guessing * TCP/IP stacks auditing * hping can also be useful to students that are learning TCP/IP.

http://www.hping.org/

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