$OpenBSD: README,v 1.7 2018/09/04 12:46:17 espie Exp $

+-----------------------------------------------------------------------
| Running igmpproxy on OpenBSD
+-----------------------------------------------------------------------

To use igmpproxy on OpenBSD, you will need to configure it by
editing /etc/igmpproxy.conf, and configure the OS for
multicast forwarding:

# echo multicast=YES >> /etc/rc.conf.local
# echo net.inet.ip.mforwarding=1 >> /etc/sysctl.conf

and restart. Note that client machines using OpenBSD should
also be configured with multicast=YES.

Start igmpproxy at boot time in the usual way:

# rcctl enable igmpproxy; rcctl start igmpproxy

PF must be configured so that control packets (proto igmp) and
data packets (destination address within 224.0.0.0/4) are passed.
