ip link set enp0s3 down
ip link set name wan dev enp0s3
ip a add 192.168.15.4/24 dev wan
ip link set wan up
ip r add default via 192.168.15.1 dev wan

echo nameserver 127.0.1.1 > /etc/resolv.conf
echo nameserver 1.1.1.1 >> /etc/resolv.conf

sysctl -w net.ipv4.ip_forward=1

iptables -A FORWARD --in-interface gauche --out-interface droite -j ACCEPT
iptables -A FORWARD --in-interface droite --out-interface gauche -j ACCEPT