We are having trouble configuring Portal web adaptor in our DMZ (reverse proxy server). After installing the 10.5.1 software, the configuration page for the web adaptor won't load. Our portal web adaptor seems to be redirected. Not sure where to look why this is occurring, (probably in IIS) nor if there are any ESRI logs to check to see what is happening. Is there any additional documentation or experiences with this issue?
Server Error in '/portal' Application.
Description: An error occurred during the processing of a configuration file required to service this request. Please review the specific error details below and modify your configuration file appropriately.
Parser Error Message: Unrecognized attribute 'targetFramework'. Note that attribute names are case-sensitive.
Line 200: <add path="*" verb="*" type="ESRI.ArcGIS.WebAdaptor.AGSHandler, ESRI.ArcGIS.WebAdaptor, Version=10.5.1.0, Culture=neutral, PublicKeyToken=8fc3cc631e44ad86" /> Line 201: </httpHandlers>Line 202: <compilation debug="false" targetFramework="4.5">Line 203: <assemblies> Line 204: <add assembly="System.Core, Version=126.96.36.199, Culture=neutral, PublicKeyToken=B77A5C561934E089" />
Source File: C:\inetpub\wwwroot\portal\web.config Line: 202
Version Information: Microsoft .NET Framework Version:2.0.50727.5483; ASP.NET Version:2.0.50727.5483