NAME

       igrp - igrp route injector

SYNOPSIS

       igrp  -i  <interface>  -v  -f  <routes  file> -a <as number> -S <spoofed source ip addrs> -D <destination
       router ip addrs>

DESCRIPTION

       This manual page documents briefly the igrp command.   This  manual  page  was  written  for  the  Debian
       distribution because the original program does not have a manual page.

       IGRP  is  a  tool  for  route injection. The routing protocol IGRP is no longer really widely used in the
       outside world, but for the first steps, we decided to use this one as a starting point.

       The whole purpose is to define a routing table with all possible parameters by hand without  having  your
       system  actually  running  any  kind  of dynamic routing and sending this information out to the routers.
       Since IGRP is a broadcast based protocol, the default behavior is  to  send  these  messages  to  the  ip
       broadcast  address (255.255.255.255). If you want to inject a route to a system remote from you, you have
       to address the 'update' accordingly and make sure that you send  the  packet(s)  with  the  right  source
       address, so the router accepts the update.

       Before  using the tool, you have to design your routing table you want to inject in the target router. It
       should contain data which makes your route the preferred one for the victim. The format is:

       destination:delay:bandwidth:mtu:reliability:load:hopcount

       where destination is the network (192.168.1.0), delay is in ms/10, bandwidth in MBit per second,  MTU  is
       the  maximum  transfer unit (1500 for ethernet), reliability and load are in percent (255=100%, 1=0%) and
       hopcount just in hops.

       Empty lines and lines beginning with # are ignored.

       -i <interface> interface

       -v verbose

       -f <routes file> file, which contains the routes  (as much as you like)

       -a <autonomous system> autonomous system the IGRP process is running on,  use  ASS  to  find  it  out  or
       specify  a  range  to  use  with  -a START -b STOP to send updates to all AS from START to STOP (I highly
       recommend using ASS for this!!)

       -S <spoofed source IP> maybe you need this

       -D <destination IP> If you don't specify this, the broadcast address is used

       If you want the routes to be persistent (after some testing around), make up a shell  loop  and  run  the
       program within this loop every 25-30 seconds, to keep the router believing your routes.

AUTHOR

       This  manual  page  was written by Vince Mulhollon <vlm@debian.org>, for the Debian GNU/Linux system (but
       may be used by others).

                                                 January 1, 2003                                         IGRP(1)