This tutorial deals with setting up a WLAN HotSpot on a Linksys WRT54GS router using OpenWrt, ChilliSpot, and FreeRadius. OpenWrt is a Linux distribution for Linksys WRT54G. ChilliSpot is a wireless LAN access controller. It is used for authenticating users of the wireless LAN. It supports web based login for hotspots. FreeRadius is a server that manages remote user authentication and accounting.