fragtest.8

.\"
.\" Copyright (c) 2002 Dug Song <dugsong@monkey.org>
.\"
.\" $Id: fragtest.8,v 1.2 2002/02/24 04:41:44 dugsong Exp $
.\"
.TH FRAGTEST 8
.SH NAME
fragtest \- test IP fragment reassembly behaviour
.SH SYNOPSIS
.BI fragtest " TESTS ... host"
.SH DESCRIPTION
.B fragtest
probes the remote
.I host
to determine its TCP/IP stack behaviour.
.LP
The 
.I TESTS
may include any of the following (or may be specified as
.B all
to perform them all):
.TP
.B ping
Send an ICMP echo request to the host.
.TP
.B ip-opt
Send ICMP echo requests with different IP options, to see which IP
options are supported.
.TP
.B frag
Send an ICMP echo request as 8-byte fragments.
.TP
.B frag-new
Send an ICMP echo request as 8-byte fragments with an overlapping
16-byte fragment, favoring newer data in reassembly.
.TP
.B frag-old
Send an ICMP echo request as 8-byte fragments with an overlapping
16-byte fragment, favoring older data in reassembly.
.TP
.B 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.
.SH "SEE ALSO"
.BR fragroute (8)
.SH AUTHOR
Dug Song <dugsong@monkey.org>
.SH BUGS
Firewalls or other filtering network devices may block IP fragments,
packets with IP options, ICMP echo traffic, etc.