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HTTP Status Code
511 - Network Authentication Required

5xx Server errors

The HTTP Status Code 511 means that client needs to authenticate to gain network access.

Status code 511 is intended to be used by by intercepting proxies used to control access to the network.

Additional Links and Codes Related to Status Code 511
401 - Unauthorized
101 - Switching Protocols
505 - HTTP Version Not Supported
306 - Switch Proxy
← View all HTTP Status Codes

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