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A captive portal describes the webpage that asks for authentication, payment, and/or acceptance of terms of the agreement in order to access the Internet via a public provided WiFi hotspot you might find at coffee shops, airports, business centers, or hotel lobbies. You may simply be asked to accept their terms or you might be prompted for payment.A captive portal describes the webpage (''and backend facility'') that asks for authentication, payment, and/or acceptance of terms of the agreement in order to access the Internet via a public provided WiFi hotspot you might find at coffee shops, airports, business centers, or hotel lobbies. You may simply be asked to accept their terms or you might be prompted for payment.BASIC COMPONENTS:# web server and possibly web application server or proxy server# web server and possibly web application server or proxy server (Apache + Squid) FIREWALL UTILITY CAPTIVE PORTAL:Options include using [[PFSense and OPNsense]]. Captive Portal in pfSense software forces users on an interface to authenticate before granting access to the Internet. Where possible, the firewall automatically presents a login web page in which the user must enter credentials such as a username/password, a voucher code, or a simple click-through agreement.[[Category:Security]]