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Man page of FRAGROUTE

FRAGROUTE

Section: Maintenance Commands (8)
Index of this MAN page

Back To MAN Pages From BackTrack 5 R1 Master List  

NAME

fragroute - intercept, modify, and rewrite egress traffic  

SYNOPSIS

fragroute [-f file] host  

DESCRIPTION

fragroute intercepts, modifies, and rewrites egress traffic destined for the specified host, implementing most of the attacks described in the Secure Networks ``Insertion, Evasion, and Denial of Service: Eluding Network Intrusion Detection'' paper of January 1998.

The options are as follows:

-f file
Read ruleset from the specified file instead of /usr/local/etc/fragroute.conf.

Unlike fragrouter(8), this program only affects packets originating from the local machine destined for a remote host. Do not enable IP forwarding on the local machine.  

RULESET

fragroute is composed of several modules which enable various configuration directives. Each directive operates on a logical packet queue handed to it by the previous rule.
# string ...
Ruleset comment, no-op.
delay first|last|random ms
Delay the delivery of the first, last, or a randomly selected packet from the queue by ms milliseconds.
drop first|last|random prob-%
Drop the first, last, or a randomly selected packet from the queue with a probability of prob-% percent.
dup first|last|random prob-%
Duplicate the first, last, or a randomly selected packet from the queue with a probability of prob-% percent.
echo string ...
Echo the string argument(s) to standard output.
ip_chaff dup|opt|ttl
Interleave IP packets in the queue with duplicate IP packets containing different payloads, either scheduled for later delivery, carrying invalid IP options, or bearing short time-to-live values.
ip_frag size [old|new]
Fragment each packet in the queue into size-byte IP fragments, preserving the complete transport header in the first fragment. Optional fragment overlap may be specified as old or new, to favor newer or older data.
ip_opt lsrr|ssrr ptr ip-addr ...
Add IP options to every packet, to enable loose or strict source routing. The route should be specified as list of IP addresses, and a bytewise pointer into them (e.g. the minimum ptr value is 4).
ip_ttl ttl
Set the IP time-to-live value of every packet to ttl.
ip_tos tos
Set the IP type-of-service bits for every packet to tos.
order random|reverse
Re-order the packets in the queue randomly, or in reverse.
print
Print each packet in the queue in tcpdump-style format.
tcp_chaff cksum|null|paws|rexmit|seq|syn|ttl
Interleave TCP segments in the queue with duplicate TCP segments containing different payloads, either bearing invalid TCP checksums, null TCP control flags, older TCP timestamp options for PAWS elimination, faked retransmits scheduled for later delivery, out-of-window sequence numbers, requests to re-synchronize sequence numbers mid-stream, or short time-to-live values.
tcp_opt mss|wscale size
Add TCP options to every TCP packet, to set the maximum segment size or window scaling factor.
tcp_seg size [old|new]
Segment each TCP data segment in the queue into size-byte TCP segments. Optional segment overlap may be specified as old or new, to favor newer or older data.
 

EXAMPLES

Fragment all traffic to a Windows host into forward-overlapping 8-byte fragments (favoring older data), reorder randomly, and print to standard output:

        ip_frag 8 old
        order random
        print

Segment all TCP data to a host into forward-overlapping 4-byte segments (favoring newer data), interleave with overwriting, random chaff segments bearing older timestamp options for PAWS elimination, reorder randomly, and print to standard output:

        tcp_seg 4 new
        tcp_chaff paws
        order random
        print
 

FILES

/usr/local/etc/fragroute.conf
Default configuration ruleset
 

SEE ALSO

fragtest(8)  

AUTHOR

Dug Song <dugsong@monkey.org>  

BUGS

It is entirely possible to mangle your outgoing traffic so badly that no remote TCP/IP stack will accept it. K.I.S.S.


 

Index

NAME
SYNOPSIS
DESCRIPTION
RULESET
EXAMPLES
FILES
SEE ALSO
AUTHOR
BUGS

This document was created by man2html, using the manual pages.
Time: 07:34:21 GMT, September 13, 2011

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