![]() ViaĪdded by proxies, both forward and reverse proxies, and can appear in the request headers and the response headers.Websites track users’ activities and behaviors as they navigate the site and collect information about their devices using web-tracking technologies such as browser fingerprinting and cookies to improve the browsing experience. To provide information about the proxy itself (not about the client connecting to it), the Via header can be used. Identifies the protocol (HTTP or HTTPS) that a client used to connect to your proxy or load balancer. Identifies the original host requested that a client used to connect to your proxy or load balancer. Identifies the originating IP addresses of a client connecting to a web server through an HTTP proxy or a load balancer. Or the de-facto standard versions: X-Forwarded-For Non-standard A common way to disclose this information is by using the following HTTP headers:Ĭontains information from the client-facing side of proxy servers that is altered or lost when a proxy is involved in the path of the request. The IP address of the original client is often used for debugging, statistics, or generating location-dependent content. This can be useful if a proxy is used to provide client anonymity, but in other cases information from the original request is lost. Proxies can make requests appear as if they originated from the proxy's IP address. Permissions-Policy: xr-spatial-tracking Experimental.Permissions-Policy: storage-access Experimental.Permissions-Policy: speaker-selection Experimental.Permissions-Policy: serial Experimental. ![]() Permissions-Policy: screen-wake-lock Experimental.Permissions-Policy: publickey-credentials-get Experimental.Permissions-Policy: publickey-credentials-create Experimental.Permissions-Policy: picture-in-picture Experimental.Permissions-Policy: payment Experimental.Permissions-Policy: magnetometer Experimental.Permissions-Policy: local-fonts Experimental.Permissions-Policy: idle-detection Experimental.Permissions-Policy: identity-credentials-get Experimental.Permissions-Policy: gyroscope Experimental.Permissions-Policy: gamepad Experimental.Permissions-Policy: execution-while-out-of-viewport Experimental.Permissions-Policy: execution-while-not-rendered Experimental.Permissions-Policy: encrypted-media Experimental.Permissions-Policy: document-domain Experimental.Permissions-Policy: battery Experimental.Permissions-Policy: autoplay Experimental.Permissions-Policy: ambient-light-sensor Experimental.Permissions-Policy: accelerometer Experimental.Reason: Multiple CORS header 'Access-Control-Allow-Origin' not allowed.Reason: missing token 'xyz' in CORS header 'Access-Control-Allow-Headers' from CORS preflight channel.Reason: invalid token 'xyz' in CORS header 'Access-Control-Allow-Methods'.Reason: invalid token 'xyz' in CORS header 'Access-Control-Allow-Headers'.Reason: expected 'true' in CORS header 'Access-Control-Allow-Credentials'.Reason: Did not find method in CORS header 'Access-Control-Allow-Methods'.Reason: Credential is not supported if the CORS header 'Access-Control-Allow-Origin' is '*'.Reason: CORS request external redirect not allowed.Reason: CORS preflight channel did not succeed.Reason: CORS header 'Origin' cannot be added.Reason: CORS header 'Access-Control-Allow-Origin' missing.Reason: CORS header 'Access-Control-Allow-Origin' does not match 'xyz'.CSP: require-trusted-types-for Experimental.CSP: prefetch-src Non-standard Deprecated.CSP: plugin-types Non-standard Deprecated.CSP: block-all-mixed-content Deprecated.Sec-CH-UA-Platform-Version Experimental.Sec-CH-UA-Full-Version-List Experimental.Sec-CH-Prefers-Reduced-Motion Experimental.Large-Allocation Non-standard Deprecated.Accept-CH-Lifetime Non-standard Deprecated.
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