List of rules for NAT of QEMU user mode network stack, as comma-separated list of ports. For each port specified, it will redirect port x of the VM (example: 80) to the port x + 10000 of the public IPv6 (example: 10080). Defaults to none.
Please note: Since new version of KVM (1.0.191) released, the qemu process will now restart automatically as soon as you change a parameter (so the VM will reboot).