We currently have a very small basic wireless network setup and we are looking to extend access to our connectivity to guests.

What we would like to do is being able to configure a Guest VLAN on the wireless connection that would display a disclaimer on the terms of use prior to granting access to the network.

We are currently using a pair of AP1142N access points connected back into a Cisco 6509 w/ Sup 720.  The access points are not lightweight access points as the small number of access points we are managing did not warrant the need for centralized configuration.

We happen to have an unused Cisco 2811 router lying around and found a used NM-AIR-WLC6 on Ebay that appears to be the most inexpensive wireless controller that I can find.  Will this support a captive portal?

Is there a way to implement a captive portal without a wireless lan controller?  Are there devices that can placed into our network that would provide captive portal services to both wireless and specified wired switchports (or inline to an entire switch of wired ports)?

Any assistance would be appreciated...

Please note that we do not need any type of authentication with the captive portal, just simply a disclaimer with the terms of use.  If there is a way to do it without additional devices that would require authentication, we would consider a guest/guest username/password combination to accomplish this.