HotSpot with bridged interfaces

Hi!

Is it posible to setup working hotspot on bridged interfaces.

I want to use hotspot only for autoryzation.
I have fully bridged network with main router on Linux (DHCP, firewall, traffic shape).

Any ideas

Why hotspot?

What You think about PPPoE or PPTP authentication?

Its much easer to implemet then PPPOE.
The nework is big.

I am searching for the same authorization type : bridged hotspot on a campus network with mikrotik, but i don’t know how to setup it.
but i know that it is possible with zeroshell live CD (free distribution)