Thanks for the guidance! In my simulation, I have one more issue... I want to block traffic in nodes, wifi interface, but iptables rules don't seem to block the UDP packetes from MIH in port 4551 (discovery beacons?)... I've tried


iptables -A INPUT -i adhoc -j REJECT
iptables -A OUTPUT -o adhoc -j REJECT

iptables -A FORWARD -i adhoc -o adhoc -j REJECT
iptables -A FORWARD -i adhoc -o adhoc -j REJECT

ip6tables -A INPUT -i adhoc -j REJECT
ip6tables -A OUTPUT -o adhoc -j REJECT

iptables -A INPUT  -m pkttype --pkt-type multicast -j REJECT
iptables -A OUTPUT -m pkttype --pkt-type multicast -j REJECT

iptables -A FORWARD  -m pkttype --pkt-type multicast -j REJECT
iptables -A FORWARD -m pkttype --pkt-type multicast -j REJECT