title: POST requests fail with : IIS 7.5 + ARR 2.0(Reverse Proxy) + OWIN http modules
body: <p>IIS ARR reverse proxy implementation is failing after my top level application in integrated with OKTA SSO. The OKTA integration uses OWIN modules and WS-Federtaion protocol.The back-end WebSphere app server is logging a socketTimeout exception and the FRT logs on IIS are pasted below.</p>
  
  <p>MODULE_SET_RESPONSE_ERROR_STATUS</p>
  
  <p>ModuleName ApplicationRequestRouting Notification 128 HttpStatus 500 HttpReason Internal Server Error HttpSubStatus 0 ErrorCode 0 ConfigExceptionInfo Notification EXECUTE_REQUEST_HANDLER ErrorCode The operation completed successfully. (0x0)
  And also two steps up, the General_Read_entity_end shows Bytes received as zero.</p>
  
  <p>-GENERAL_READ_ENTITY_END
  BytesReceived 0 ErrorCode 2147942438 ErrorCode Reached the end of the file. (0x80070026)</p>
  
  <p>I've put the request.InsertEntityBody(); in both Application_BeginRequest and EndRequest as per <a href="https://stackoverflow.com/questions/5475608/iis7-application-request-routing-arr-reverse-proxy-combined-with-managed-modul">IIS7 Application Request Routing (arr reverse proxy) combined with managed module - time out</a> but it didn't help.</p>
  
  <p>IIS 7.5, ARR 2.0, URL Rewrite 2.0, IBM WebSphere 7.0</p>
  
  <p>Any other ideas?</p>
  
  <p>Thanks</p>