OpenWrt: Configure WiFi Client as WAN and set up a 2nd AP to redistribute the WAN-Access

This is a nice thing to do if you are in a hotel and want to redistribute a single WiFi connection to other computers.

The setup works as follows: The WiFi with the SSID Telekom is the one being provided in the hotel. Here we can connect to it without encryption, the interface name is wlan1. We then create a second WiFi network where the router should act as an access point for other clients with the SSID Fireburned and we protect it with WPA2.

Check here for the required changes