I'm trying to prevent what clients may o or may not transmit between themselves, and from reading:
http://wiki.openwrt.org/OpenWrtDocs/IPT … cbd1c48ee0

4.6. forwarding_rule (filter)

This rule applies to packets to be forwarded from one interface to the other. It is called regardless of the originating interface, meaning that it may be used to target packets either inbound (WAN to LAN) or outbound (LAN to WAN).

Note that the FORWARD chain automatically accepts packets that are related to a previous connection.

It seems I cannot limit this by using  forwarding_rule, so is there any way to accomplish this by iptables?, do I have to look for something else?

Thanks in advance
Tuxerg