511 Network Authentication Required
The 511 HTTP response status code means that you are connected to a network with a captive portal.
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Introduction
In Action
Sample
Conclusion
Introduction
When you see the HTTP status code 511 Network Authentication Required, it means that you are connected to a network with a captive portal.
The captive portal requires you to sign in or provide authentication before you can access the internet or certain websites. It’s like a login screen that pops up when you connect to public Wi-Fi, and you need to complete the sign-in process to get full access.
In Action
When you encounter the HTTP status code 511 Network Authentication Required, it means that you need to log in before you can access the network or certain services.
This is often seen in places like hotels, where you need to sign in to their Wi-Fi portal to get internet access. The status code is used to let your web browser know that the login page is not from the usual website server but from a gateway that manages access to the network.
Sample
In the example scenario, when you try to access a resource using your web browser, the server responds with a 511 Network Authentication Required status code.
This means you need to log in or authenticate yourself before you can access the network or the desired content. Once you complete the authentication process, you’ll be granted regular access to the network and can browse freely.
Request
GET / HTTP/1.1
Host: www.example.com
Response
HTTP/1.1 511 Network Authentication Required
Content-Type: text/html; charset=UTF-8
Content-Length: 199
< html>
< head>
< title>Network Authentication Required< /title>
< /head>
< body>
< p>Before accessing this service, you must <a href=”https://login.example.re/”>Login< /a>.< /p>
< /body>
< /html>
Conclusion
The 511 Network Authentication Required status code indicates that you need to log in or authenticate yourself before accessing a network or specific content. It acts as a gatekeeper, prompting you to complete the sign-in process before granting regular access to the desired resource.
