multicast router utilizing IGMP forwarding
igmpproxy is a simple multicast routing daemon which uses IGMP forwarding to dynamically route multicast traffic. Routing is done by defining an "upstream" interface on which the daemon acts as a normal Multicast client, and one or more "downstream" interfaces that serves clients on the destination networks. This is useful in situations where other dynamic multicast routers cannot be used.
Homepage: https://github.com/pali/igmpproxy/