Just a Url

[Fons]

Hello, as a newbie to pfsense I have a question about CP.
What we have is a pfsense box with six interfaces. one of them is serving our guests who all hook in to our Foyer subnet. the guests use a variety of equipment as you can imagine. Whe don't want our guests to login, whe just want to redirect them to an outside url which they will see first before accessing the www. this page will mostly be used to advertise the programs in the venue and the gorgeous menus in the restaurant. or for special events a special webpage.
is this possible in the captive portal? or is it necessary to run a portal page?
thanks in advance, Fons