On Jan 9, 2008 5:57 PM, Michel Servaes <michel at mcmc dot be> wrote:
> I tried blocking on the WAN interface, then used IGMP as protocol, and
> as destination 224.0.0.1

The protocol most likely isn't IGMP. I'd change that to any and leave
the rest of the rule as is, that should work. I've done that before
and it worked properly.

-Chris