401 Unauthorized on a directory

Question

I assume this is an IIS error  as this doesn t happen if I run the project on my local machine  I have my stylesheets at   Content css Any files in that directory won t load on the page  and when I navigate to them directly  I get a server error   401 - Unauthorized  Access is denied due to invalid credentials  You do not have permission to view this directory or page using the credentials that you supplied   This only happens with that directory  I have no problem accessing any other files  Is there something I need to do in IIS7 to stop this

User · Answer

In our case it was Windows-integrated authentication specified in the app s web config BUT the windows-auth module was not installed on the IIS machine at all  Just adding another possible reason

User · Answer

You need to check the folder permissions on your server and check that the account that you are using to run your application has access to that folder

User · Answer

It is likely that you do not have the IUSR computername permission on that folder   I ve just had a quick scan and it looks like you will find the information you need here   If that isn t the case  are you prompted for your username and password by the browser   If so it may be that IIS is configured to use Integrated authentication only  as described here

User · Answer

For me the  Anonymous User access was fine at the server level  but varied at just one of my  virtual  folders    Took me quite a bit of foundering about and then some help from a colleague to learn that IIS has  authentication  settings at the virtual folder level too - hopefully this helps someone else with my predicament

User · Answer

Open IIS and select site that is causing 401 Select Authentication property in IIS Header Select Anonymous Authentication  Right click on it  select Edit and choose Application pool identity  Restart site and it should work

User · Answer

You do not have permision to view this directory or page using the credentials that you supplied   This happened despite the fact the user is already authenticated via Active Directory   There can be many causes to Access Denied error  but if you think you   ve already configured everything correctly from your web application  there might be a little detail that   s forgotten  Make sure you give the proper permission to Authenticated Users to access your web application directory   Here are the steps I took to solve this issue    Right-click on the directory where the web application is stored and select Properties and click on Security tab  Click on Click on Edit     then Add    button  Type in Authenticated Users in the Enter the object names to select   then Add button  Type in Authenticated Users in the Enter the object names to select  Click OK and you should see Authenticated Users as one of the user names  Give proper permissions on the Permissions for Authenticated Users box on the lower end if they   re not checked already  Click OK twice to close the dialog box  It should take effect immediately  but if you want to be sure  you can restart IIS for your web application    Refresh your browser and it should display the web page now   Hope this helps

User · Answer

Another simple fix I found was to delete the local IIS site  from within IIS Manager  and then re-create the virtual directory from the  Properties  of your web project in Visual Studio

User · Answer

Open IIS select site where you are facing the problem Select Below     - Right click on Anonymous Authentication and click on edit and follow below

[asp.net] "401 Unauthorized" on a directory

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