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 reassem

bly.

frag-old

Send an ICMP echo request as 8-byte fragments with

an overlapping 16-byte fragment, favoring older data in reassem

bly.

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.

FRAGTEST(8)