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
AUTHOR
Dug Song <dugsong [AT] monkey.org>
BUGS
Firewalls or other filtering network devices may block IP fragments, packets with IP options, ICMP echo traffic, etc.