Sorry if this is a repeat as i cannot find the other post I put up regarding this, basically I have 2 360's in the house and at one time both had an open NAT, somewhere along the line (possibly a firmware update) something has happened and now only one 360 has an open NAT and the other has a moderate NAT. Now today they both have moderate NAT and I have done everything I can think of, resetting the router, upnp active and deactive, pre configured ports for Xbox Live (which up until now did work for one 360) but no joy. I have searched for manually opening the relevant ports to no avail. I am thinking of buying a new router but I am unsure of which one to buy, I have only had a D-Link (which worked perfectly) previous to getting fibre optic so am at a slight loss. I was going to opt for the Home Hub 4 but I don't know if they suffer the same problem as the 3.
Any help would be appreciated.