I have a hospitality client that will provide free wireless internet access. As part of this solution, we need to implement a "captive portal" solution.
A restaurant patron will be redirected to a website to agree to Terms/Conditions before they are redirected to the public internet.
DLink has a nice little hub-sized device that does this for you. It's a 3100, though I forget the letters in front of that.
We worked with the folks at DLink. It seems this unit required a Username/Password to gain access, which we need to avoid.
The DLink is unable to support a link and would require username/password.
We customized our intercept page. Use their web site to download the manual for the device and see what is needed for the commands - you can then pass the correct verification once someone has clicked on the action button of your choice (perhaps an "I accept").
We simply wrote our own pages and then uploaded them to the DSA device.
Whoever you spoke with there didn't know these devices very well.