iptables -A INPUT -i \! $WAN -j ACCEPT # allow from lan/wifi interfaces
iptables -A INPUT -p icmp -j ACCEPT # allow ICMP
iptables -A INPUT -p 47 -j ACCEPT # allow GRE
iptables -A INPUT -i \! $WAN -j ACCEPT # allow from lan/wifi interfaces
iptables -A INPUT -p icmp -j ACCEPT # allow ICMP
iptables -A INPUT -p 47 -j ACCEPT # allow GRE