FRAGTEST(8)					      FRAGTEST(8)


NAME
       fragtest - test IP fragment reassembly behaviour

SYNOPSIS
       fragtest TESTS ... host

DESCRIPTION
       fragtest	 probes	 the  remote host to determine its TCP/IP
       stack behaviour.

       The TESTS may include any of  the  following  (or  may  be
       specified as all to perform them all):

       ping   Send an ICMP echo request to the host.

       ip-opt Send  ICMP echo requests with different IP options,
	      to see which IP options are supported.

       frag   Send an ICMP echo request as 8-byte fragments.

       frag-new
	      Send an ICMP echo request as 8-byte fragments  with
	      an  overlapping  16-byte	fragment,  favoring newer
	      data in reassembly.

       frag-old
	      Send an ICMP echo request as 8-byte fragments  with
	      an  overlapping  16-byte	fragment,  favoring older
	      data in reassembly.

       frag-timeout
	      Send an ICMP  echo  request  as  8-byte  fragments,
	      omitting	the  last  fragment, and wait for an ICMP
	      time-exceeded-in-reassembly reply.

SEE ALSO
       fragroute(8)

AUTHOR
       Dug Song <dugsong@monkey.org>

BUGS
       Firewalls or other filtering network devices may block  IP
       fragments,  packets  with  IP  options, ICMP echo traffic,
       etc.
