[ubuntu] Ad hoc welcome (or default) screen

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http://ubuntuforums.org – I have set up my laptop with Internet dj and want to make an ad hoc network for people around me to join and be able to listen. My problem is I don't know how to have the ad hoc automatically redirect their web browser to the right page. I know some programs like chillispot exist but I'm not sure if this is what I need or how to configure it. ( I'm still learning networking) so if you know of any programs or have any advice I would be very grateful. :) (Hardware)