Jul 21, 2010 · There's a problem with 401 Unauthorized, the HTTP status code for authentication errors. And that’s just it: it’s for authentication, not authorization. Receiving a 401 response is the server telling you, “you aren’t authenticated–either not authenticated at all or authenticated incorrectly–but please reauthenticate and try again.”

Jan 20, 2017 · When indicating HTTP Basic Authentication we return something like: WWW-Authenticate: Basic realm="myRealm" Whereas Basic is the scheme and the remainder is very much dependent on that scheme.

Aug 7, 2014 · HTTP 401 responses must always include a WWW-Authenticate header, that instructs the client how to authenticate. HTTP 403 responses do not include the WWW-Authenticate header. The kind of response that will be used depends on the authentication scheme. While Richardson seems to disagree: 401 (“Unauthorized”) Importance: High.

Mar 5, 2020 · I had a problem where the I would add an extra character to a password. And Insomnia(Or Postman) would return a JSON response from the server along with a 401 HTTP status code.

Nov 8, 2012 · Open IIS and select the website that is causing the 401 Open the "Authentication" property under the "IIS" header Click the "Windows Authentication" item and click "Providers"

Dec 22, 2012 · I'm a little confused about Basic authentication in regards to web browsers. I had thought that the web browser would only send an Authorization header after having received an HTTP 401 status in the previous response. However, it appears that Chrome sends the Authorization header with every request thereafter.

May 5, 2011 · I kept getting 401.3 Unauthorized errors even though I had set the NTFS/share permissions correctly. Turns out the Anonymous user was running as IUSR instead of AppPoolIdentity. – Bitmapped

Feb 6, 2014 · IIS 7.5 - Erro HTTP 401.0 - Unauthorized. 1. 401 error: unable to access start page of IIS website with ...

Oct 3, 2013 · That's the cause of 401.3. By changing file system access (grant that account access to files) or changing anonymous account to pool identity (pool identity is in IIS_IUSRS, which usually have access to files), IIS should have enough permissions to access the files.

Jul 3, 2015 · This no-longer works in ASP.NET Core, the ControllerBase class (used by ASP.NET Core WebAPI) no-longer has a Content overload that accepts a HTTP status code. – Dai Commented Sep 7, 2018 at 23:54