Like Gus, and many others, I found this product impossible. Unlike Gus, I would point out that there are many good Netgear products on the shelves - just give this one a miss!
Technical Support was diabolical and costly (telephone). It took weeks to convince them that the product was not up to specification and, even then, they put all sorts of obstacles in the way of providing a replacement.
Like Gus, I will not be buying another Netgear product.