Sing is a little tool that sends ICMP packets fully customized from
command line. The main purpose is to replace/complement the niceful
ping command with certain enhancements as:
o Send fragmented packets.
o Send monster packets > 65534.
o Send/read spoofed packets.
o 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.
o Send many ICMP error types: Redirect, Source Quench, Time Exceeded,
Destination Unreach and Parameter Problem.
o Send to host with Loose or Strict Source Routing.
o Use little fingerprinting techniques to discover Window$ or Solaris
boxes.
o Send ICMP packets emulating certain OS: Cisco, Solaris, Linux, Shiva,
Unix and Window$ at the moment.
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