I have the following in my web.config file.
<location path="login.aspx">
<system.web>
<authorization>
<deny users="?"/>
</authorization>
</system.web>
</location>
This means that upon going to the login page the user is prompted to enter there Active Directory login to access the page. Is there anyway to make IIS/ASP.net automatically pick up this information so I can use the following
HttpContext.Current.User.Identity.Name
On the login page to establish an automatic login.
If this string is not empty I will check it against a database table containing a list of permitted users that is managed by an external application (also manages permissions within the website)
The reason I would like to have this process automated is that if the user does not have there name entered into this database they should be presented with a normal login screen which has various override logins (forms authentication) naturally whilst this is not automated the end user would have to enter a login (which may be valid within the context of the active directory) but invalid as far as the web application is concerned.
I have found that removing the section
<deny users="?"/>
Does not prompt for an active directory login, but also the
HttpContext.Current.User.Identity.Name = String.Empty
You need to make sure that Windows Authentication set on and Anonymous Authentication set off on IIS
In case your Windows Server doesn't include a windows authentication scheme:
Open up Server Manager (one way to do this is by right clicking the computer node from within the start menu and choosing Manage). Expend the Roles node. Right click the Web Server (IIS) and choose Add Role Services. You'll get the following wizard, just scroll down a bit and check Windows Authentication under the security node.
http://weblogs.asp.net/zroiy/archive/2008/08/17/missing-windows-authentication-provider-for-iis-7-on-windows-server-2008.aspx
Related
Hello Im Having a domain
www.xxxx.com/folder/folder/default.aspx
inside the second folder im having lot of sub folders
i want to restrict access for unauthorized user
can any one explain how to do using Web
i want to check the User name[session ] from the Cookies
if session is there need to allow access other wise deney
can any one pls help
<system.web>
<authorization>
<deny users="?"/>
<allow users="xxxx"/>
</authorization>
</system.web>
Now its blocking all users its not allowing for user xxxx
Please help
The best way for doing this is setting the authentication mode to Windows. By doing this the server will use the domain accounts or the local user accounts to allow access. You just have to set the appropriate permissions to these users or to their user groups directly in this folder (by using the security tab in Windows folder properties).
Another developer and I are both working on the same ASP.NET web app. The application uses Forms authentication, but the IIS virtual directory is configured with both "anonymous access" and "integrated Windows authentication". This mirrors the production site which authenticates as required.
A potentially key difference between our two setups is that he is on Windows 7 and IIS 7, whereas I'm on Windows XP and IIS 5 (for my sins).
Initially when we both run the app, the variable... HttpContext.Current.User.Identity.IsAuthenticated ...is false. This I'd expect because we're configured with Forms authentication. The app then redirects to a WindowsAuth.aspx page. That page checks the Request.ServerVariables["LOGON_USER"] server variable and, if this isn't null or empty, uses it to automatically sign in.
The issue is, on my PC Request.ServerVariables["LOGON_USER"] is always empty. To me this is correct since we have anonymous access enabled. But on my colleague's PC, and in production, the variable holds the user's username. I cannot understand why this is. Is there a difference between IIS 5 and 7 in this regard? Otherwise, can you explain this? Obviously I want my setup to reflect other environments but upgrading to Windows 7 is a last resort at this point.
https://support.microsoft.com/en-us/kb/306359
To populate the LOGON_USER variable when you use any authentication mode other than None, you can deny access to the Anonymous user in the section of the Web.config file. To deny access to the Anonymous user in the section, follow these steps:
Change the authentication mode in the Web.config file to anything other than None. For example, the following entry in the Web.config file sets the authentication mode to Forms-based authentication:
<authentication mode="Forms" />
To deny access to the Anonymous user in the Web.config file, use the following syntax:
<authorization>
<deny users = "?" /> <!-- This denies access to the Anonymous user -->
<allow users ="*" /> <!-- This allows access to all users -->
</authorization>
If you are using Windows authentication, you can also use the following steps to resolve this problem:
Change the authentication mode in the Web.config file to Windows as follows:
<authentication mode="Windows" />
In the Internet Services Manager, right-click the .aspx file or the Web Project folder, and then click Properties.
If you clicked Properties for the Web Project folder, click the Directory Security tab. If you clicked Properties for the .aspx file, click the File Security tab.
Under Anonymous Access and authentication control, click Edit.
In the Authentication methods dialog box, clear the Anonymous Access check box, and then select either the Basic, the Digest or the Integrated (NT Challenge/Response) check box.
Click OK to close both dialog boxes.
The issue is I can't view the page using Window Authentication.
This is my steps.
I created a website in my server Windows Server 2003 IIS 6 with .Net Framework 2.
Then Inside the root folder, I created a folder. Let's call it "FolderA".
In "FolderA", I created a page. Let's call it "fileA.aspx".
The website is running fine. As I turn on the Anonymous Access.
But for "fileA.aspx", I need to turn on the Window Authentication coz I don't want everyone to go in and view that page.
So, I select "FolderA", go to Properties,
So, I turn off the Anonymous Access and make sure Window Authentication is turned on.
Then I browse from my PC. It prompted me the Login Diaglog Box.
I key in my credentials I used to log in for the server and I can access the page.
That is working fine.
However, when I view it from the server itself, it prompted me the Login Diaglog Box.
But when I key in my credentials, it is saying "Access Denied".
I even tried using Administrator credentials.
It is still access denied.
Is there any setting to set or anything to change in web.config?
http://support.microsoft.com/kb/896861
Review event logs on the server to see if you happen to hit this.
Did you allow authenticated users and deny not authenticated users?
<authorization>
<allow users="*"/>
<deny users="?"/>
</authorization>
I have an asp.net (dynamic data) website set up as an application in a subdirectory of another site. This site requires different security settings from the top level site. Something like:
<authorization>
<allow roles="ADMIN"/>
<deny users="*"/>
</authorization>
These settings are ignored in the sub site. However, they work on the top level site, but even when set on the top level site, they are not inherited by the sub-site, and it's freely accessible. What could cause these settings to be ignored? I've tried adding:
<location path="." inheritInChildApplications="false">
to the top level web.config and then setting the above authorization rule in the sub site, even tried just denying all users. When visiting the site it looks like: http://mysite/mybrokensite
I am using windows authentication.
I think the key thing is this
website set up as an application in a
subdirectory of another site
If it's a separate application within IIS it should have it's own web.config file and the security settings can be set from there. So you'll have one web.config for the main site and one for the subsite. really they are two applications.
If it's just a subfolder under your website then this doesn't apply. It depends how you've set it up under IIS. If it's a seperate app then the icon will be a world/cabbage type icon. If it's a sub-folder they the icon will be ... well a folder.
To elaborate on Tim's answer, make sure in IIS that it is set up as a virtual directory. Look at the property page for that directory in IIS Admin, Directory (or Home Directory) tab. If the Application label is greyed out, hit the Create button. Now IIS will load the web.config from that directory.
I typed up a summary since many were facing the same situation regarding subfolder authentication.
Subfolder Authorization
ASP.NET can only have a single
authentication mode for one
application.
The different
applications CANNOT share resource
among them.
Scenario
Let's say the home page should not prompt login dialog. It should let users pass through without whatever login is. However, in the same applicatiopn, in a different folder presumably, another page needs to check user permission against database table using user network login ID. By default IE treats all web site with only hostname a Intranet. By its default intranet setting, it will not prompt the login dialog and pass user login and password to the application if Windows Authentication is used. However, the tricky party is, if the application has an actual domain, IE will think it is an Internet site, and it will prompt the login and password if Windows Authentication is used.
The only way to not to promopt login dialog for Internet site using Windows Authentication, is to also turn on the anonymous authentication in IIS. However, you will lose the ability to capture the login info because the Anonymous has precedence over the Windows Authentication. The good news is there is a way to resolve that issue. If an application subfolder needs to capture the login information, you will need to overwrite the parent authorization in Location element in web.config.
1 In IIS, configure Authentication as follows:
Enable Anonymous Authentication,
Enable Windows Authentication
2 Add the followings in Web.Config.
<authentication mode="Windows" />
<authorization>
<allow users="*" />
</authorization>
<!-- secured is the relative subfolder name. deny anonymous user, so only the authenticated login will pass through -->
<location path="secured" allowOverride="true">
<system.web>
<authorization>
<deny users="?" />
</authorization>
</system.web>
</location>
We have an existing publicly accessible web application with user controls, data access libraries, graphics, etc. We want to create a new secure section of the site that accesses some of the already existing resources.
Initially we created the new section of the site as a virtual directory which (we hoped) would allow us to access the parent site's resources. We added the appropriate location information to the base web.config (authentication and authorization) but we continue to see the following error "Parser Error Message: It is an error to use a section registered as allowDefinition='MachineToApplication' beyond application level. This error can be caused by a virtual directory not being configured as an application in IIS."
In response to that error we created the directory as a new application. This allows us to authenticate properly but has the drawback of not being able to access any of the resources in the parent directory (since it's outside the application scope).
Is there any way to secure the new section of the site while at the same time utilize the already existing resources?
In your web.config file in the root of your site, if you add:
<location path="relativePathToDir">
<system.web>
<authorization>
<deny users="?"/>
</authorization>
</system.web>
</location>
This is working for me using FormsAuthentication, the user gets redirected to the default login page if not authenticated
I typed up a summary since many were facing the same situation regarding subfolder authentication.
Subfolder Authorization
ASP.NET can only have a single
authentication mode for one
application.
The different
applications CANNOT share resource
among them.
Scenario
Let's say the home page should not prompt login dialog. It should let users pass through without whatever login is. However, in the same applicatiopn, in a different folder presumably, another page needs to check user permission against database table using user network login ID. By default IE treats all web site with only hostname a Intranet. By its default intranet setting, it will not prompt the login dialog and pass user login and password to the application if Windows Authentication is used. However, the tricky party is, if the application has an actual domain, IE will think it is an Internet site, and it will prompt the login and password if Windows Authentication is used.
The only way to not to promopt login dialog for Internet site using Windows Authentication, is to also turn on the anonymous authentication in IIS. However, you will lose the ability to capture the login info because the Anonymous has precedence over the Windows Authentication. The good news is there is a way to resolve that issue. If an application subfolder needs to capture the login information, you will need to overwrite the parent authorization in Location element in web.config.
1 In IIS, configure Authentication as follows:
Enable Anonymous Authentication,
Enable Windows Authentication
2 Add the followings in Web.Config.
<authentication mode="Windows" />
<authorization>
<allow users="*" />
</authorization>
<!-- secured is the relative subfolder name. deny anonymous user, so only the authenticated login will pass through -->
<location path="secured" allowOverride="true">
<system.web>
<authorization>
<deny users="?" />
</authorization>
</system.web>
</location>
Remove the application, then add this to the top-level web.config:
<configuration>
<system.web>
<!-- applies application wide -->
</system.web>
<location path="securedirectory" allowOverride="false">
<system.web>
<!-- applies only to the path specified -->
</system.web>
</location>
</configuration>
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