The restricted configuration is due to trust concerns with forwarded headers, for example, IP spoofing. Forwarded Headers Middleware is activated to run first in the middleware pipeline with a restricted configuration specific to the ASP.NET Core Module. IIS/IIS Express and ASP.NET Core Moduleįorwarded Headers Middleware is enabled by default by IIS Integration Middleware when the app is hosted out-of-process behind IIS and the ASP.NET Core Module (ANCM) for IIS. For more information, see Forwarded Headers Middleware options and Configuration for a proxy that uses different header names. If the appliance uses different header names than X-Forwarded-For and X-Forwarded-Proto, set the ForwardedForHeaderName and ForwardedProtoHeaderName options to match the header names used by the appliance. Consult your appliance manufacturer's guidance if proxied requests don't contain these headers when they reach the app. Not all network appliances add the X-Forwarded-For and X-Forwarded-Proto headers without additional configuration. The ForwardedHeaders value is ForwardedHeaders.None, the desired forwarders must be set here to enable the middleware.The forwarded headers are named X-Forwarded-For and X-Forwarded-Proto.Only loopback addresses are configured for known proxies and known networks.There is only one proxy between the app and the source of the requests.: Set using the X-Forwarded-Host header value.įor more information on the preceding, see this GitHub issue.įorwarded Headers Middleware default settings can be configured.: Set using the X-Forwarded-Proto header value.The same pattern is applied to the other headers, Host and Proto. The consumed values are removed from X-Forwarded-For, and the old values are persisted in X-Original-For. For details, see the Forwarded Headers Middleware options. Additional settings influence how the middleware sets RemoteIpAddress.
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