sing

Sing is a little tool that sends fully customized ICMP packets from command line. The main purpose is to replace/complement the nice ping command with certain enhancements as: - Send fragmented and monster packets > 65534 bytes - Send/read spoofed packets - Send many ICMP Information types in addition to the echo request type, sent by default as address mask request, timestamp, information request, router solicitation and router advertisement - Send many ICMP error types: redirect, source quench, time exceeded, destination unreach and parameter problem - Send to host with loose or strict source routing - Use little fingerprinting techniques to discover Windows or Solaris boxes - Send ICMP packets emulating certain OS: Cisco, Solaris, Linux, Shiva, Unix and Windows at the moment

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