I just installed two Airport Express routers in a restaurant to improve their wifi coverage. The first device (AE1) is connected to the restaurant's DSL router via ethernet, and the second device (AE2) extends the network created by AE1 via wireless. This is set up and working perfectly.
The problem is, the restaurant is close to a lot of residential stuff, and they've had issues with people pirating their signal. So, obviously, they would like to password protect their wifi, changing the password weekly, and providing it to customers upon request. This would be simple enough with one device, but I'm confused as to how I can go about it with two devices.
Should I set up the WPA/WPA2 on AE2 first, then AE1? Will AE2 even be able to extend AE1 if AE1's network is password protected? I have many questions, but they all boil down to, is this even possible, and how can I do it?