Automate NAT configuration

[Centaurus99]

Allow rattan-cli to access the internet.

[Lethe10137]

A temporary walk-around on Ubuntu 22.04 :

# Allow ip forwarding
echo 1 | sudo tee /proc/sys/net/ipv4/ip_forward

#setup NAT
sudo iptables -t nat -A POSTROUTING -s 10.0.0.0/8 -o <Your network interface> -j MASQUERADE

#setup FORWARD
sudo iptables -A FORWARD -s 10.0.0.0/8 -j ACCEPT
sudo iptables -A FORWARD -d 10.0.0.0/8 -j ACCEPT

Run the script above before starting rattan. No lasting change after reboot.