I am trying to understand concepts of windows authentication, forms authentication and their differences. I am confused. Can someone help me in clarifying this.
Thanks.
Windows Authentication provider is the default authentication provider for ASP.NET applications. When a user using this authentication logs in to an application, the credentials are matched with the Windows domain through IIS.
There are 4 types of Windows Authentication methods:
1) Anonymous Authentication - IIS allows any user
2) Basic Authentication - A windows username and password has to be sent across the network (in plain text format, hence not very secure).
3) Digest Authentication - Same as Basic Authentication, but the credentials are encrypted. Works only on IE 5 or above
4) Integrated Windows Authentication - Relies on Kerberos technology, with strong credential encryption
Forms Authentication - This authentication relies on code written by a developer, where credentials are matched against a database. Credentials are entered on web forms, and are matched with the database table that contains the user information.
Windows Authentication refers to authenticating against Windows user accounts on the box that the application is running on.
Forms authentication is a stand alone method of authenticating in .NET forms that you can hook up to some other system, such as a database.
It's pretty simple. Windows Authentication makes use of the Windows Login system.
http://en.wikipedia.org/wiki/Integrated_Windows_Authentication
And with Forms Authentication the user will need to provide a username and password manually.
http://www.asp.net/web-forms/tutorials/security/introduction/an-overview-of-forms-authentication-vb
The Forms Authentication also allows you to choose where you access the login data from. It could for example be stored in your own local database. While Windows Authentication is only going to use your Windows login data. This data usually comes from Active Directory, if your network is built using an enterprise/buisness/domain setup.
http://en.wikipedia.org/wiki/Active_Directory
Windows Authentication-- The user will be authenticated on the IIS server against the credentials he provided when logging into his system. If the authentication fails then a pop up form will be displayed in the Internet Explorer asking for his credentials i.e. username and password.
Forms Authentication-- A default Login Page will be available like Facebook login, where user will be authenticated instead of automatically getting the credentials from the system credentials i.e. the current user of the Windows system. If the user requests a secure page and has not logged in, then ASP.NET redirects him/her to the login page. Once the user is authenticated, he/she will be allowed to access the requested page. Here IIS does not come into effect for authentication, it completely depends on the web application.
Related
I'm looking for a way to auto-login a user that's logged in with an Azure AD user account into a web application.
What I've got so far: A web application that uses an Azure OAUTH workflow to login to the application. The user is forwarded to Azure's login page and after a successful login, he will be redirected to the web application with an oauth code that later used to get the user's identity.
Now I've got a new situation: Windows PC are part of a Azure Active Directory and the users all use AD users. Is it possible to use NTLM/Windows Integrated Authentication to auto-login when they open the page.
I looked for a way to enable NTLM/WIA for the OATUH flow to avoid that a user has to re-enter the credentials that he just used to unlock his pc.
Is there a way to do this?
using framework asp.net core - on .net core MVC jquery
In the account controller, I am attempting to obtain the user currently logged in to that machine on an intranet network. ie the windows authenticated user.
If I try WindowsIdentity.GetCurrent() is just returns the identity of the application pool. not what I need.
I have anonymous turned off and windows auth turned on in both the launchsettings.json and the IIS settings.
I understand that the identity middleware for abp framework I'm using is table based so the Controllers 'User' property is not what I need either.
I am wondering whether this is a limitation of the .net core?
You need to disable Anonymous Authentication and enable Windows Authentication for a specific page like Login page. This way, you say the Login page requires NTLM. So browser sends authenticated user information. And you can retrieve it with HttpContext.User.Identity.Name
Then there's next challenge! Authenticating this user with ABP. For this one, you can check out this StackOverflow post.
Am I mad?
I can create authentication providers using OWIN and ASP.Net Identity for Facebook, google, etc. But I have a requirement to authenticate my users against Windows. I'd rather not require the configuration of AD, or to tell IIS what Domain to authenticate against; I just want the IIS to authenticate as if the settings was Windows Authentication in the Web config.
But then I want to be able to get roles and user details. I want Roles in SQL Server. I also require the user first and last name, which are not directly available from windows auth).
In the past I have done this with a mixed authentication middleware, and grabbed the user details from the principle context when creating the user, store that in SQL, and in the authentication cookie. but this seems a bit of overkill here.
Has anyone succesfully used basic Windows Authentication but held roles and first/last name in sql?
thanks
Yes, you can use Windows authentication with ASP.NET and IIS.
This article, should be a good start.
You can then store users and their AD groups in the application, and manage access based on that mapping.
I have an application on windows azure where users are authenticating by using ACS ( with ADFS 2.0).
There is a requirement that before certain actions, the user must confirm his identity by retyping his password.
Is there some way to ask ACS to check for credentials when a user is already signed in?
For a moment I thought about checking against the cookies created for the authentication, but I am not really sure that is possible. Besides, this feels just wrong.
Any ideas? I have been trying to search for REST apis of azure's ACS but it seems there are only management api calls for ACS.
There's no way to do this other than signing the user out and making them sign back in again. Even that, though, won't guarantee a password entry in all cases. If ADFS is configured for integrated auth (Kerberos), and the user is on a domain joined machine, they may never have entered their credentials and there's nothing you can do to force them to.
I have developed a mobile application using asp.net mvc3,html5,jquerymobile. I am authenticating the user using the ADFS authentication. Using IPAD or IPhone once the user is authenticated he is able to perform a download functionality in order to download an application. Now once the download functionality is completed when the user again tries to navigate back to the application he is prompted with the login window once again.
I need to stop the user from again entering the login credentials once again. So I thought of caching the user credentials will be good idea.
Can anyone help me to know how can we cache the user credential details in this case in order to prevent the user from entering the login credentials once again.
Thanks & Regards,
Santosh Kumar Patro
You could use persistent cookies. When authenticating simply pass true as second argument to the FormsAuthentication.SetAuthCookie method. This will emit a cookie that will be stored on the client for the given timeout period that you specify in the <forms> of your web.config.