Syntax

X-Forwarded-Proto: <protocol>

Directives

<protocol>

The forwarded protocol (http or https).

Examples

X-Forwarded-Proto client protocol

The following header indicates that the original request was made over HTTPS before being forwarded by a proxy or load balancer:

X-Forwarded-Proto: https

Non-standard forms

The following forms may be seen in request headers:

# Microsoft
Front-End-Https: on
X-Forwarded-Protocol: https
X-Forwarded-Ssl: on
X-Url-Scheme: https

Specifications

Not part of any current specification. The standardized version of this header is Forwarded.

See also

• X-Forwarded-Host, X-Forwarded-For headers
• Forwarded