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captive portal

A network that sends every request to a login page until you sign in.

A captive portal intercepts a newly joined client's traffic and redirects it to a sign-in page, so a device can have Wi-Fi and an address yet reach nothing it asks for.

Examples

  • During SoftAP setup the board at 192.168.4.1 answers every web request with its setup form, so the phone pops the form open as a captive portal.

  • Hotel and café Wi-Fi often uses a captive portal: every page you open shows the login page until you sign in.

See also

SoftAP provisioning DNS
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