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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"AspNetCoreModule is ignoring request validation hints during redirection","articleBody":"I am using the .NET Core Redirection Module to forward some external traffic to an internal URL.\r\n\r\nThe logs on the IIS reverse proxy site appear fine.\r\n\r\n```\r\ninfo: Microsoft.AspNetCore.Hosting.Internal.WebHost[1]\r\n      Request starting HTTP/1.1 POST http://localhost/SiteWithReverseProxy/OldUrl text/xml 545\r\ninfo: Microsoft.AspNetCore.Rewrite.RewriteMiddleware[9]\r\n      Request was redirected to http://localhost:9999/NewUrl\r\n```\r\n\r\nThis results, I think understandably, in a validation rejection, due to the port delimiter:\r\n\r\n`A potentially dangerous Request.Path value was detected from the client (:)`\r\n\r\nHowever, I cannot get the AspNetCoreModule to respect `web.config` changes to validation policy.\r\n\r\nWorth noting that the ported destination is running in-process and otherwise responsive.\r\n\r\nThis is my proxy `web.config`, with the usual cabal of validation changes:\r\n\r\n```xml\r\n\u003c?xml version=\"1.0\" encoding=\"utf-8\"?\u003e\r\n\u003cconfiguration\u003e\r\n  \u003csystem.web\u003e\r\n    \u003cpages validateRequest=\"false\" /\u003e\r\n    \u003chttpRuntime requestValidationMode=\"2.0\" relaxedUrlToFileSystemMapping=\"true\" requestPathInvalidCharacters=\"\" /\u003e\r\n  \u003c/system.web\u003e\r\n  \u003csystem.webServer\u003e\r\n    \u003chandlers\u003e\r\n      \u003cadd name=\"aspNetCore\" path=\"*\" verb=\"*\" modules=\"AspNetCoreModule\" resourceType=\"Unspecified\" /\u003e\r\n    \u003c/handlers\u003e\r\n    \u003caspNetCore processPath=\"%LAUNCHER_PATH%\" arguments=\"%LAUNCHER_ARGS%\" forwardWindowsAuthToken=\"false\" stdoutLogEnabled=\"false\"\u003e\r\n      \u003cenvironmentVariables\u003e\r\n        \u003cenvironmentVariable name=\"ASPNETCORE_ENVIRONMENT\" value=\"Tokens\" /\u003e\r\n      \u003c/environmentVariables\u003e\r\n    \u003c/aspNetCore\u003e\r\n  \u003c/system.webServer\u003e\r\n\u003c/configuration\u003e\r\n```\r\n\r\n","author":{"url":"https://github.com/danielcrenna","@type":"Person","name":"danielcrenna"},"datePublished":"2017-11-17T05:33:40.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":0},"url":"https://github.com/250/AspNetCoreModule/issues/250"}