I know about ASP.NET Authentication mode (Form, Windows and Passport) and we have used mostly Form based authentication for our web applications. I want to know how IIS takes part in authentication, does it pre-authenticates the request before passing it to the ASP.NET. How can I configure IIS authentication ?
Very broad topic, but essentially, IIS does not authenticate if anonymous authentication is enabled. This relies on the application to do any required authentication (such as Forms, as you mentioned)
If anonymous is turned off, IIS can authenticate using the following methods:
Basic: credentials passed as http header with each request
Digest: sort of a more-secure basic; the password is hashed
Windows: uses client's windows credentials to authenticate
Certificate: requires a specific x509 certificate to be sent by the client
More details: http://technet.microsoft.com/en-us/library/cc733010(v=ws.10).aspx
Related
We are using Identity Server 3 in our tool that has the following structure. One (AngularJs) Spa with 10 Web APIs . We use the WindowsAuthWebHost mini project to do the windows handshake to get the windows(domain) identity of the user, based on which we build a complex(with custom claims) token that it's used by the client Web APIs. All the 10 Web APIs have anonymous authentication set in the IIS. And it works smoothly.
Now, we are trying to expose this tool outside the company network and a perquisite is to have windows authentication on all the Web APIs in the IIS. If we set this time of authentication, now all the calls are unauthorized.
Do you know if there is a way to keep the same flow, but also validated the windows authentication?
Windows authentication will not work outside of the network. The user needs to have a valid user account in your domain (username/password), or even a local account on your IIS server.
Note that NTLM doesn't work through some proxy servers, so this is one reason that Windows AuthN isn't used so much on the public internet.
To achieve your requirement you could use the form authentication with active directory.you may need to enable both form and anonymous authentication. then create deny authorization rule for anonymous users and allow rule for all users.
How To: Use Forms Authentication with Active Directory in ASP.NET 2.0
We want to build one spring MVC based application which will support below use case:
User access the application URL to login into application.
Once the valid credentials are entered to login into application, the user can access any of the service provider application for performing SSO.
On the access of any service provider application the SAML response should be generated and post to the Service provider ACS(Assertion consumer service) URL.
Also in addition to IDP initiated SSO, it should also support SP initiated SSO where the authentication request will we posted to the application login page, after valid credentials are entered by user, the application should redirect to service provider(which have posted the authentication request).
The application should have its own login page and authentication mechanism, it should not redirect to any other identity provider for authentication.
Should we use normal Spring MVC based application which will generated the SAML response using open SAML library, or any other SAML builder can be used for satisfying the above use case.
This basically means
- your app bundles a SAMLv2 compliant IdP (please don't try to build one yourself based on some SAML lib)
- your app calls an API of the IdP for authentication and issues a session token the IdP will recognize later on (otherwise authentication will always happen again when another application (acting as SAMLv2 SP) wants to perform SSO
Issue with the latter: The "token" will most likely be a cookie and then the restrictions of the cookie spec apply. This means you can only use host-based cookies (which security mandates) if your app and the IdP are deployed behind the same 'FQDN' (e.g. by using an HTTP reverse-proxy)
Another issue: How does your app know when the show the 'login screen' if the user actually has a valid session with the IdP because SSO was started at a different SP?
SAML way: You would first have to do a 'passive AuthnRequest' to check this.
Conclusion: Your use case can be achieved, but the effort seems quite high. I'm not aware that there is some lib/framework, which would offers this at the moment OOTB.
I have an ASP.NET web application that is entirely protected by Forms Authentication.
Is there a configuration under which web requests coming from another application on the same machine, either web or console, can bypass the form authentication and access the page as if it were authenticated?
#merlin2011,you have two chose.
1.use cookie with same machineKey in the different application.(simplest)
the Forms Authentication in ASP.NET use cookie to Encryption and decryption your identity and indicates whether you are logged.the application use different key to encrypt you identity in the different application by default.
see more:
Forms Authentication Across Applications
notes:this solution only for the between application in the same web domain.
(for example,www.example.com,a.example.com,if the www.example1.com will not work)
2.the application in the different web domain(Complex)
in this situation,you need the Single Sign-on solution .this will required you need to write code to authenticate a user whether is logged.
this article will can help you Cross Site Authentication and Data Transfer
good luckly!
I have a web application (say app1) which is hosted in a IIS server virtual directory.
This web application needs Integrated Windows Authentication for its functioning.
I need to integrate this web application with another product which does not use supply me windows credentials.
This application sends me an http request in a specific format.
I need to validate the request and redirect it to app1 with valid windows credentials so that it logs in smoothly.
I have created another application for this purpose
This is hosted on a separate virtual directory.
It has IIS anonymous and asp.net anonymous authentication enabled.
the pseudo code is as follows :
app2
parse request
if request sucessful
get windows credentials
get identity using credentials
reponse.redirect(app1.aspx)
But app1 authentication fails, IE asks me for credentials again.
Ideally IE should not ask me for credentials.
What would be the security context sent in the request to app1.
How can I trace the authentication failure at iis and asp.net?
To do this you need a trust relationship between the domains.
The response.redirect just sends a response back to the browser which then makes a request for the page in the redirect. So the identity is the identity of the browser.
My production environment involves a pair of IIS 6 web servers, one running legacy .NET 1.1 applications and the other running .NET 2.0 applications. We cannot install .NET 2.0 alongside 1.1 on the same machine because it is a tightly-regulated 'Validated System' and would present a bureaucratic nightmare to revalidate.
Websites on both servers use Basic Authentication against Active Directory user accounts.
Is it possible for a web application on the 1.1 server to securely redirect a user to a page served on the 2.0 server, without requiring users to re-authenticate?
No, because you're not using cookies for authentication in that scenario, so ScaleOvenStove's link won't help.
Basic authentication sends the login information in the HTTP headers with every request, but it's the browser that does this, when it sees a new server, new password request.
(Or indeed as suggested change the authentication on both systems to support single signon)
In order to achieve this you could implement a single sign-on solution.
This solution would have one server be your master authentication server. This server would be responsible for authentication and creating a cookie for the user. When you redirect to the other server (on the same domain) check to see if the authentication cookie exists that was created by the authentication server, and if it exists, and has valid data, auto login the user. Make sure that you set the domain on the forms authentication ticket and cookie, and then both servers which exist on the same domain will be able to access this cookie.
I would google single sign on asp.net. There's a number of ways to achieve it, but it's definitely achievable.
yes, check out here
http://weblogs.asp.net/scottgu/archive/2005/12/10/432851.aspx