IIS Express gives Access Denied error when debugging ASP NET MVC

Question

I have created an ASP NET MVC 3 project  and am using IIS Express as the web server when developing  When I try to debug  I get the error message below   How can this be solved      Server Error in     Application       Access is denied    Description  An error occurred while accessing the resources required to serve this request  The server may not be configured for access to the requested URL       Error message 401 2   Unauthorized  Logon failed due to server configuration   Verify that you have permission to view this directory or page based on the credentials you supplied and the authentication methods enabled on the Web server   Contact the Web server s administrator for additional assistance

User · Answer

I opened my web config file  and found and removed this section    lt authorization gt     lt deny users       gt   lt  authorization gt    and my site came up  but there are issuues with the authentication

User · Answer

Our error page was behind the login page  but the login page had an error in one of the controls  which creates an infinite loop   We removed all the controls from the offending page  and added them back one by one until the correct control was located and fixed

User · Answer

In my case I had to open the file   C      Documents IISExpress config applicationhost config   I had this inside the file      lt authentication gt     lt anonymousAuthentication enabled  true  User      gt    I just removed the User    part  I really don t know how this thing got there        Note  Make sure you have something like this in the end of applicationhost config                      lt location path  MyCompany MyProjectName Web  gt           lt system webServer gt               lt security gt                   lt authentication gt                       lt anonymousAuthentication enabled  true    gt                       lt windowsAuthentication enabled  false    gt                   lt  authentication gt               lt  security gt           lt  system webServer gt       lt  location gt   lt  configuration gt    You may also want to take a look here  https   stackoverflow com a 10041779 114029  Now I can access the login page as expected

User · Answer

Hosting on IIS Express  1  Click on your project in the Solution Explorer to select the project  2  If the Properties pane is not open  open it  F4   3  In the Properties pane for your project     a  Set  Anonymous Authentication  to  Disabled      b  Set  Windows Authentication  to  Enabled

User · Answer

I had to run Visual Studio in Administrative Mode to get rid of this error

User · Answer

In my case  ASP NET MVC 4 application   the Global asax file was missing  It was appearing in Solution explorer with an exclamation mark  I replaced it and the error went away

User · Answer

The cause if had for this problem was IIS Express not allowing WindowsAuthentication  This can be enabled by setting   lt windowsAuthentication enabled  true  gt    in the applicationhost config file located at C  Users username  Documents IISExpress config

User · Answer

I had also the same problem and finally I could overcame it   Solution Explorer   Right click on project   Properties   Web tab   Project Url  I have chosen another port number  and every things became fine

User · Answer

I used Jason s answer but wanted to clarify how to get in to properties    Select project in Solution Explorer      F4 to get to properties  different than the right click properties  Change Windows Authentication to Enabled

User · Answer

I ve been struggling with this problem trying to create a simple App for SharePoint using Provider Hosted   After going through the applicationhost config  in the  section  basicAuthentication was set to false   I changed it to true to get past the 401 2 in my scenario   There are plenty of other links of how to find the applicationhost config for IIS Express

User · Answer

None of the above had worked for me  This had been working for me prior to today  I then realized I had been working with creating a hosted connection on my laptop and had Shared an internet connection  with my Wireless Network Connection   To fix my issue   Go to Control Panel   Network and Internet   Network Connections  Right click on any secondary Wireless Network Connection you may have  mine was named Wireless Network Connection 2  and click  Properties    Go to the  Sharing  tab at the top   Uncheck the box that states  Allow other network users to connect through this computer s Internet connection    Hit OK   then Apply   Hope this helps

User · Answer

I didn t see this  complete  answer anywhere  I just saw the one about changing port numbers after I posted this  so meh   Make sure that in your project properties in visual studio that project url is not assigned to the same url or port that is being used in IIS for any site bindings   I m looking up the  why  for this  but my assumption off the top of my head is that both IIS and Visual Studio s IIS express use the same directory when creating virtual directories and Visual Studio can only create new virtual directories and cannot modify any that IIS has created when it applies it s bindings to the site    feel free to correct me on the why

User · Answer

In my case a previous run of my app from VS reserved the URL  I could see this by running in a console   netsh http show urlacl   to delete this reservation i ran this in an elevated console   netsh http delete urlacl http   127 0 0 1 10002    I found these steps here solved my problem   I m using VS2013

User · Answer

If you are using Visual Studio  you can also left-click on the project in Solution Explorer and change the Windows Authentication property to Enabled in the Properties window

User · Answer

I just fixed this exact problem in IIS EXPRESS fixed it by editing the application host  config to the location section specific to the below   I had set Windows Authentication in Visual Studio 2012 but when I went into the XML it looked like this      the windows auth tag needed to be added below as shown    lt windowsAuthentication enabled  true    gt    lt location path  MyApplicationbeingDebugged  gt             lt system webServer gt               lt security gt                   lt authentication gt                       lt anonymousAuthentication enabled  false    gt                       lt  -- INSERT TAG HERE -- gt                    lt  authentication gt               lt  security gt           lt  system webServer gt   lt  location gt

[asp.net-mvc] IIS Express gives Access Denied error when debugging ASP.NET MVC

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