Proxmox: Port forwarding

En mode routed:

post-up iptables -t nat -A PREROUTING -i enp2s0 -p tcp --dport 3390 -j DNAT --to 172.31.32.3:3389
post-down iptables -t nat -D PREROUTING -i enp2s0 -p tcp --dport 3390 -j DNAT --to 172.31.32.3:3389