Nosuid TCP/IP ping is a small, secure replacement for the original ping
command. Unlike its setuid counterpart, it won't allow flood-pings,
security compromises and other typical problems. It uses TCP syn-rst
challenge/response instead of ICMP echo and echo-reply.
WWW: http://lcamtuf.coredump.cx/
from Artur Skura <arturs@iidea.pl> with changes from me
