FreeBSD Security Advisory FreeBSD-SA-15:04.igmp (fwd) - ipfw fix?

[Andrei]

On Wed, 25 Feb 2015 18:21:58 +0100
Remko Lodder <remko at FreeBSD.org> wrote:

> 
> This suggests that you can filter the traffic:
> 
> Block incoming IGMP packets by protecting your host/networks with a
> firewall. (Quote from the SA).
> 
> Br,
> Remko
> 

Looks like Captain Obvious here. The question was how exactly to do it?

Kind regards,
Andrei.