421 Misdirected Request

The HTTP 421 Misdirected Request client error response status code indicates that the request was directed to a server that is not able to produce a response. This can be sent by a server that is not configured to produce responses for the combination of scheme and authority that are included in the request URI.

Clients may retry the request over a different connection.

Status

421 Misdirected Request

Examples

Apache SNI error

Given the following request:

GET / HTTP/1.1
Host: abc.example.com

In cases such as a wildcard certificate (*.example.com) and a connection is reused for multiple domains (abc.example.com, def.example.com), the server may respond with a 421:

HTTP/1.1 421 Misdirected Request
Date: Wed, 26 Jun 2024 12:00:00 GMT
Server: Apache/2.4.1 (Unix)

Specifications

See also

• HTTP response status codes
• Multiple hosts and misdirected requests Apache Server documentation
• TLS 1.3
• Server Name Indication (SNI)
• Transport Layer Security (TLS) configuration