Untangle has captive portal functionality; It's a linux based OS with firewall, vpn, and a bunch of other stuff. you need hardware with 2 NICs. We run it for a

Untangle has captive portal functionality; It's a linux based OS with firewall, vpn, and a bunch of other stuff. you need hardware with 2 NICs. We run it for a small busniess off of a refurbished desktop and it works fine for roughly 250 connected users at any given time. Here's a link to the home page: https://www.untangle.com/ https://www.untangle.com/ And to the captive portal section of the wiki: https://wiki.untangle.com/index.php/Captive_Portal https://wiki.untangle.com/index.php/Captive_Portal Alternatively you could get a router compatible with OpenWRT or Tomato firmware and set up a captive portal on the router itself.