Description:

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