Igmprt
From DD-WRT Wiki
IGMPproxy is a simple dynamic Multicast Routing Daemon using only IGMP signalling (Internet Group Management Protocol). It's intended for simple forwarding of Multicast traffic between networks.
See also [igmpproxy project sourceforge page]
In Eko TNG SVN 11296
igmprt -h igmpproxy, Version 0.1 beta2, Build 090101 Copyright 2005 by Johnny Egeland <johnny@rlo.org> Distributed under the GNU GENERAL PUBLIC LICENSE, Version 2 - check GPL.txt usage: igmpproxy [-h] [-d] [-c <configfile>] -h Display this help screen -c Specify a location for the config file (default is '/etc/igmpproxy.conf').