Captive Portal is a webpage authentication setting. A captive portal is a 'Landing' web page, presented by a Layer 3 brand Layer 2 Operator and shown to users before they gain more-broad access to URL or http-based Internet services. Often used to present a Landing or Log-In page, the portal intercepts observed packets the user is authorized to launch browser sessions. After redirected to a web page which may require authentication, payment, acceptance of EULA/acceptable use policies or other valid credentials that the host and user agree to, the user is granted conditional Internet access.