511 NETWORK AUTHENTICATION REQUIRED

The customer needs to validate to pick up organize get to. 

The reaction representation SHOULD contain a connect to an asset that enables the client to submit qualifications (e.g., with a HTML structure). 

Note that the 511 reaction SHOULD NOT contain a test or the login interface itself, since programs would show the login interface as being related with the initially mentioned URL, which may cause perplexity. 

The 511 status SHOULD NOT be created by cause servers; it is expected for use by catching intermediaries that are mediated as a methods for controlling access to the system. 

Reactions with the 511 status code MUST NOT be put away by a store. 

The 511 status code is intended to alleviate issues brought about by “hostage entries” to programming (particularly non-program specialists) that is expecting a reaction from the server that a request was made to, not the mediating system foundation. It isn’t proposed to energize sending of hostage entries – just to confine the harm brought about by them. 

A system administrator wishing to require some verification, acknowledgment of terms, or other client collaboration before giving access typically does as such by recognizing customers who have not done as such (“obscure customers”) utilizing their Media Access Control (MAC) addresses. 

Obscure customers at that point have all traffic obstructed, aside from that on TCP port 80, which is sent to a HTTP server (the “login server”) devoted to “signing in” obscure customers, and obviously traffic to the login server itself. 

For instance, a client specialist may associate with a system and make the accompanying HTTP demand on TCP port 80: 

HTTP/1.1 511 Network Authentication Required

Content-Type: text/html

<html>

  <head>

    <title>Network Authentication Required</title>

    <meta http-equiv=”refresh” content=”0; url=https://login.example.net/”>

  </head>

  <body>

    <p>You need to <a href=”https://login.example.net/”>

    authenticate with the local network</a> in order to gain

    access.</p>

  </body>

</html>

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