iptables -D forwarding_rule -i ppp+ -j ACCEPT 2>/dev/null
iptables -D forwarding_rule -o ppp+ -j ACCEPT 2>/dev/null

iptables -A forwarding_rule -i ppp+ -j ACCEPT
iptables -A forwarding_rule -o ppp+ -j ACCEPT
echo 1 > /proc/sys/net/ipv4/conf/br-lan/proxy_arp