jolla usb and wifi tethering iptables

#!/bin/bash
echo 1 > /proc/sys/net/ipv4/ip_forward
iptables -t nat -A POSTROUTING -o rmnet0 -j MASQUERADE
iptables -t nat -A POSTROUTING -o wlan0 -j MASQUERADE
iptables -A FORWARD -i rmnet0 -o rndis0 -m state --state RELATED,ESTABLISHED -j ACCEPT
iptables -A FORWARD -i rndis0 -o rmnet0 -j ACCEPT
iptables -A FORWARD -i wlan0 -o rndis0 -m state --state RELATED,ESTABLISHED -j ACCEPT
iptables -A FORWARD -i rndis0 -o wlan0 -j ACCEPT