I'm trying to setup a Netcomm NF5 N300 router as a gigabit switch/wireless AP. I don't want a double NAT as I have another router in front of it.

I know the common solution to this is to connect the other router to a LAN port instead of WAN, disable DHCP, give it a static IP and use the other 3 LAN ports, however I really want to use all 4 LAN ports.

I've managed to solve this for all the wired ports by assigning all of them to VLAN 1, which I've assigned to the WAN in bridge mode (they were in NAT mode before) and also enabling remote administration for the router so I can still access the settings. Anything I plug into the LAN ports gets an IP address from the upstream subnet and works fine.

However, I can't find this option for wireless clients, which are all still connecting through the NAT (I've left NAT and DHCP enabled for the LAN subnet, otherwise they can't connect at all). I've tried telnetting into the router, but that doesn't seem to work. Does anyone know if there's a solution to this or should I just live with my wireless clients being under a second NAT?