How can I make devices connect to my network/Internet automatically?

[wajed]

For every devices, I have to insert IP address / Gateway / DNS.

How can I make devices connect automatically, without further configuration?

I have BiPAC 7300GA as my main router (the router that is connected to the ISP), and other 3 APs connected to it for more coveraged.

[trpted]

#1 Enable the DHCP Server in the NAT router if it not already enabled.

#2 Enable the DHCP client on the clients if that is not already enabled.

#3 For any computer that you want to have the same IP Address every time, well that depends on the NAT router and it's firmware that it is running.

If possible you might be able to tell the NAT router to give to a certain MAC/Physical/Host Address the same IP Address every time. For example as noted at http://ui.linksys.com/E4200/2.0.25/ you can click on DHCP Reservation.

If it is not possible to do that, then each computer that you want to have the same IP every time - you need to setup a Static IP on it.