CODEWITHSUNDEEP
asp.net-coreiis-8
Brian Edwards
Brian Edwards

Reputation: 423

.Net Core and Windows Authentication in IIS 8 Failing

I have a .Net Core 1.0 web application targeting framework 4.6 that uses Windows Authentication (intranet site). It runs fine in development environment under IIS Express.

In startup.cs I have:

services.Configure<IISOptions>(options => {
            options.ForwardWindowsAuthentication = true;
          });

Once deployed to IIS 8 in Windows Server 2012, however, the application errors out on the line: 

var userName = context.User.Identity.Name;

With "Object reference not set to an instance of an object" error. In web.config, I have:

    <system.web>
       <authentication mode="Windows" />
       <authorization>
          <deny users="?" />
       </authorization>
    </system.web>

In IIS Manager under "Authentication" for the site, everything is disabled except for "Windows Authentication" as well. Another ASP.NET MVC 4 site on that same server with same settings in IIS works fine. Anything else I can try to get this working??

Upvotes: 1

Views: 1251

Answers (1)

Brian Edwards
Brian Edwards

Reputation: 423

The Config settings below resolved this issue, specifically the forwardWindowsAuthToken=true:

  <system.webServer>
    <handlers>
      <add name="aspNetCore" path="*" verb="*" modules="AspNetCoreModule" resourceType="Unspecified" />
    </handlers>
    <aspNetCore processPath="<path to app>"  arguments="" stdoutLogEnabled="true" stdoutLogFile="<outpath>" forwardWindowsAuthToken="true" />
        <security>
            <authentication>
                <anonymousAuthentication enabled="false" />
            </authentication>
        </security>
  </system.webServer>

Upvotes: 2

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