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5115xx Server errors

HTTP 511 Network Authentication Required

You must sign in to the network (for example hotel, airport or public Wi-Fi) before you can use the internet.

Quick answer

HTTP status code 511 (Network Authentication Required) means: You must sign in to the network (for example hotel, airport or public Wi-Fi) before you can use the internet. Yes, a server error: the website failed to handle the request. Usually only the site owner or host can fix it.

Is it an error?

5xx Server errors

Yes, a server error: the website failed to handle the request. Usually only the site owner or host can fix it.

The server failed to handle a valid request; the problem is on the website's side.

Common causes

  • Network requires sign-in (hotel, airport or public Wi-Fi)

If you are visiting the site

  1. Open any website to bring up the network's sign-in page

Frequently asked questions

What does HTTP 511 mean?

HTTP status code 511 (Network Authentication Required) means: You must sign in to the network (for example hotel, airport or public Wi-Fi) before you can use the internet.

Is HTTP 511 an error?

Yes, a server error: the website failed to handle the request. Usually only the site owner or host can fix it.

How do I fix a 511 error?

If you are visiting the site: Open any website to bring up the network's sign-in page.

5xx Server errors

HTTP 500 Internal Server ErrorThe server hit an unexpected error and could not complete the request.HTTP 501 Not ImplementedThe server does not support the function needed to complete the request.HTTP 502 Bad GatewayA gateway or proxy server received an invalid response from the server behind it.HTTP 503 Service UnavailableThe server is temporarily unable to handle the request because it is overloaded or under maintenance.HTTP 504 Gateway TimeoutA gateway or proxy server did not get a response in time from the server behind it.HTTP 505 HTTP Version Not SupportedThe server does not support the HTTP version used in the request.HTTP 507 Insufficient StorageThe server does not have enough storage space to complete the request.HTTP 508 Loop DetectedThe server detected an infinite loop while processing the request.