I have a web site with a few pages and a WebService. I am using form authentication.
I want to exclude the WebService from the form authentication, so that it will be available to all even when you did not do login.
How can I do that?
Thanks
Try to use location element for your service in your web.config and specify that all users can access the service by using:
<configuration>
<!-- rest of your web.config -->
<location path="MyService.asmx">
<system.web>
<authorization>
<allow users="*"/>
</authorization>
</system.web>
</location>
</configuration>
If this doesn't help you can also change authentication mode to none in the location element. If you have multiple services you can place them to separate folder and use single location element for whole folder.
Related
I got the marching orders to apply Azure Active Directory to an existing WebForms c# site which has 2 public facing pages. I was able to integrate the site with Azure AD using owin packages and configuring the app in Azure. The single sign-in is working as expected.
The problem I'm having is getting the public facing pages to allow anonymous access. I'm used to data annotations such as [AllowAnonymous] in MVC but I'm not sure of a good approach to implement something like that in Web Forms.
I've already tried placing the public aspx pages in a public folder along with this web.config:
<configuration>
<system.web>
<authorization>
<allow users="*"/>
</authorization>
</system.web>
</configuration>
Thanks in advance for the help!
I found the issue. In order to use:
<configuration>
<system.web>
<authorization>
<allow users="?"/>
</authorization>
</system.web>
</configuration>
You need to have Anonymous Authentication enabled for the project in the properties window in Visual Studio. Just editing the csproj file alone won't do it.
take a look here: https://www.codeproject.com/tips/849113/four-easy-steps-to-set-up-owin-for-form-authentica
basically for web forms apps, you set it in the configuration sections of the web.config files in either root, or etc. , you tell it which paths require what auth, which don't, etc.
as per the above link, something like
<?xml version="1.0"?>
<configuration>
<location path="About.aspx">
<system.web>
<authorization>
<deny users="?"/>
</authorization>
</system.web>
</location>
</configuration>
so this basically says deny all anonymous users for the about.aspx page. meaning the equivalent of [authorize] in mvc
Possibly a stupid question:
I have a site, developed by an outside company, which requires logon for all pages.
We'd like to add a single page to the site that DOESN'T require the user to be logged in...so they can click the link on the logon page to view "T&C's" type info.
Is this possible?
(ASP.Net 4.0 on IIS)
If you're using the ASP.Net membership providers you can specify this in the web.config file. Where for blocked pages you would expect:
<authorization>
<allow roles="granted"/>
<deny users ="*"/>
</authorization>
you can specify this per folder (or per page):
<location path="terms.aspx">
<system.web>
<authorization>
<allow users ="*"/>
</authorization>
</system.web>
</location>
to allow everyone access to this specific page.
Note that you can create a specific web.config in a folder in your website, these settings override the general web.config. This allows you to customize these settings per folder level.
Thanks to oɔɯǝɹ for pointing me in the right direction:
Added this after my node
<location path="terms.aspx">
<system.web>
<authorization>
<allow users="*"/>
</authorization>
</system.web>
</location>
Will this only have static content? Is it the asp.net application dealing with authentication?
If so you can just upload a .html file containing simple HTML (and your T&C) which will be served no problem to anyone requesting it.
I have an asp.net web site, I want restrict all users to access a folder named "log" and I have this element in web.config:
<location path="log">
<system.web>
<authorization>
<deny users="*"/>
</authorization>
</system.web>
</location>
and this element before it in system.web:
<authorization>
<allow users="*"/>
</authorization>
but still I have access to this url: http://www.mydomain.com/log/log.txt
Any ideas?
Thanks.
.txt files are not handled by ASP.NET by default. You'll have to block access to the folder from within IIS.
If you're using IIS 7 you can use Request Filtering to achieve this.
to avoid this confusions I usually create one web.config file at the directories i need to set different permissions.
If you place a web.config file inside your log folder it will work ok (and it will become easier to check the applied permissions at the folder)
Example:
<?xml version="1.0"?>
<configuration xmlns="http://schemas.microsoft.com/.NetConfiguration/v2.0">
<system.web>
<authorization>
<deny users="*"/>
</authorization>
</system.web>
</configuration>
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>
I have an existing ASP.NET application that implements Forms Authentication site-wide. The application is deployed in multiple instances (e.g., customer1, customer2, test, dev, etc...), with a separate database per instance. SSL is in play. Instance configuration is via an XML config file.
I have a new requirement to allow upload/download of certain data, which I would like to implement as a public web service.
My initial thought here was to selectively disable forms authentication for a subdirectory of the application (e.g., ~/Services), and then do authentication via a SOAP header or similar.
However, I'm not finding a way to selectively disable forms auth.
Question: Is there a way to do this? I've tried the <location> tag in web config to no avail.
If not, what are your recommendations for how to set this up? I can think of the following options:
1) Create a new "Services" project in my solution, and then configure a separate IIS ASP.NET application on that directory in each instance. (Pro: easy access to instance configuration, which may be needed in the future. Con: configuration burden for each relevant instance).
2) Create a separate "Services" solution that references needed assemblies from the application solution and host it as a separate ASP.NET application. Then, lookup the db connection string based on the UserName provided in SOAP Header. (Pro: single app to configure in IIS. Con: No easy access to instance config.)
3) ??
Clarification: I did see the answer here: Override ASP.NET forms authentication for a single page, but the use of a location tag is not helping (requests for the web service are still redirected). The relevant sections in my web.config look like this:
<system.web>
<authentication mode="Forms">
<forms loginUrl="Login.aspx"/>
</authentication>
<authorization>
<deny users="?"/>
<allow users="*"/>
</authorization>
</system.web>
<location path="~/Services/MyService.asmx">
<system.web>
<authentication mode="None" />
<authorization>
<allow users="*" />
</authorization>
</system.web>
</location>
I would think the location tag would work, where you specify the services folder and allow all users, something like:
<location path="services">
<system.web>
<authorization>
<allow users="*"/>
</authorization>
</system.web>
</location>
But you said that didn't work, have you tried putting a web.config file in the services folder and disabling forms authentication and allowing all users in that file?
You could also have a (overriding) web.config file in the services folder with the access control set to anonymous.
what worked for me was to allow users all users access in the folder where my webservices is located.
Firstly i added a configuration file in that folder and inserted the code below to allow all users.
<authorization>
<allow users="*"/>
</authorization>
</system.web>
I have one asp.net web application.
It is using two membership provider.
Two sign-in pages one for each provider.
Now i have two folders in root Folder1 & Folder2
Folder1 uses 1st membership provider
Folder2 uses 2nd membership provider
I got almost everything working including signin, create user etc in both provider.
Only issue is in Form authentication i can define only one loginpath. So when session expires or need login to access secure pages. it can only redirct to one sign in page.
Also that section can't be defined by location. by application only.
How can i get folder2 to use 2nd sign in page?
if there is anything i can define by location?
See How to override/change FormsAuthentication LoginUrl in certain cases
It appears from various people researching, that you cannot tell FormsAuthentication to have two different Login pages. But there is nothing preventing you from creating some base page class or other code in your two folders that can determine which login page to direct to. Or, I think that the Application_BeginRequest event fires before the FormsAuthentication module fires, so you could examine requests before they get redirected by FormsAuthentication. Either way though, you would be forced to allow anonymous users to Folder1 and Folder2, which is not ideal.
You need to use the <location> element in your web.config. You can use the <location> tag to apply authorization settings to an individual file or directory.
<location path="/root">
<system.web>
<authentication mode="Forms" >
<forms name="LoginForm" defaultUrl="default.aspx"
loginUrl="/root/login.aspx" protection="Encryption"
timeout="30" path="/"/>
</authentication>
<authorization>
<allow users="?" />
</authorization>
</system.web>
</location>
<location path="/root/admin">
<system.web>
<authentication mode="Forms" >
<forms name="formName" defaultUrl="login.aspx"
loginUrl="/root/admin/login.aspx" protection="Encryption"
timeout="30" path="/"/>
</authentication>
<authorization>
<allow users="?" />
</authorization>
</system.web>
</location>
MSDN
For centralized administration,
settings can be applied in the
Machine.config file. The settings in
the Machine.config file define
machine-wide policy and can also be
used to apply application-specific
configuration using <location>
elements. Developers can provide
application-configuration files to
override aspects of machine policy.
For ASP.NET Web applications, a
Web.config file is located in the
application's virtual root directory
and optionally in subdirectories
beneath the virtual root.
If you would like 1 login location and different access levels you might want to use roles.
<location path="/root">
<system.web>
<authorization>
<allow roles="admin,root" />/*admin, root is allowed */
<deny users="*" />
</authorization>
<system.web>
</location>
<location path="/root/admin">
<system.web>
<authorization>
<allow roles="admin" />/*admin is allowed */
<deny users="*" />
</authorization>
<system.web>
</location>
Users can belong to more than one
role. For example, if your site is a
discussion forum, some users might be
in the role of both Members and
Moderators. You might define each role
to have different privileges on the
site, and a user who is in both roles
would then have both sets of
privileges.
You can access all these element at
the code level if you would like to
manipulate the roles/authentication
programmatically
Page.User.Identity.Name
Page.User.Identity.IsAuthenticated
Page.User.Identity.AuthenticationType
Page.User.IsInRole("string");
Additional Links
Using 2 Membership Providers in asp.net
4 Guys From Rolla Tutorial
The ASP.NET web.config File Demystified