Linux as Wifi Hotspot Server

[khemera lin]

Dear All:

I'd like to implement a Hot Spot system using Linux. The Linux server
would basically be a gateway for a LAN to the Internet and would capture
any traffic from an unauthenticated client; and it then presents a Web
page for user login with RADIUS authentication before the user is able
to use the Internet.

I've digged a round a bit and found the program called "Less HotSpot
Server" ( http://sourceforge.net/projects/lesshotspotserv/ ). 

I'd like to ask if anyone out there could recommend me other programs.

Thanks you all in advance any ideas!

Regards,
Khem