Visitor based netoworking

[Alex (LEX) Borges]

I know this is doable by hand, but im wondering if anyone knows of a
cool set of scripts or something for visitor based netoworking
(something like dhcp+cbq+iptables to control whos accesing what and to
allow acces to a network where you should on a time basis...etc. Think
hotels with eth access or airports with wifi)