Security - Forms Authentication Without Redirect?
Feb 2, 2010
I am using ASP.Net's forms authentication, but do not want the default behavior of redirecting to a login page when a restricted area is accessed. Instead I would like to invoke a javascript JQuery dialog for the login on the current page, preventing the content behind from loading.My only issue is that by default the forms authentication wants to redirect. Is there a handler that I can hook into, or some other option to prevent the redirect?
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Jul 12, 2010
We just switched to VS2010 and seems like the forms authentication is behaving differently.
Our setup is that we have a default page (default.aspx) so that if you link to the root folder of the site, rather than a specific page, you get switched to default.aspx.
In addition, we have a working forms authentication system set up so that if you try to go to any of the pages you get redirected to a login.aspx page.
The login page can either redirect you to the forms authentication default page (default.aspx) or to the requested URL.
I'm not the one that configured this originally, but it looks like we are getting the originally requested URL from the authentication redirect, since Page.Request.Url = "http://.../Login.aspx/ReturnURL=<requestedpage>"
The problem is that this is failing to work when the original url is the root folder. In VS2008, <requestedpage> would be "/rootfolder/default.aspx", whereas now (in VS2010) we're getting "/rootfolder/". In other words, the site redirect used to be happening before the authentication check, and now it seems to be happening afterwards.
This is a problem because when we are checking to see if we need to redirect to something other than the default page, we check to see if the return URL is empty or matches the authentication defaultURL (which is also "default.aspx". If it matches, we go straight to the default page. If it doesn't we do some processing and then do the redirect. The extra processing is producing strange results when the browser is redirected to the rootfolder and therefore to the default page.
For now, I'm able to additionally test for Request + "default.aspx" (which resolved to the authenticaiton defaultURL), but this feels clunky and I can see headaches in the future if we ever need to rename default.aspx.
P.S. It has occurred to me that it's possible that something changed in web.config or another setup file when we did our conversion to VS2010. I can't find it, but that doesn't mean it's not there.
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Nov 3, 2010
how to redirect to a custom URL on Forms Authentication timeout? The timeout is working but it is only caught when I try to go to a page in my application because each Page_Load method is wrapped in a custom IsLoggedIn method. Here is the settings I have so far in the Web.config.
[Code]....
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Apr 9, 2010
Here's my scenario.
I've got a site called domain.com and also another product on product.domain.com. The product.domain.com requires authentication to access it. For consistancy in the user experience I have set the login url in the web.config on product.domain.com to be http://domain.com/Login.aspx. This redirection is working ok - and a sample url would be:
http://domain.com/Login.aspx?RedirectURL=/default.aspx
The problem is that the RedirectURL does not take into account that the request originally came from product.domain.com so when the authentication is successful the user is not redirected back to product.domain.com
I have come up with a solution for this but would like feedback if possible.
I changed the loginURL in the web.config to http://domain.com/Login.aspx?domain=product.domain.com so the sample url is now:
http://domain.com/Login.aspx?domain=product.domain.com&ReturnURL=Default.aspx
I then override the LoggedIn event in the membership control and check to see if the domain value pair is specified and if it is I redirect to the domain + ReturnURL.
As I said previously i'd appreciate any comments or other ways to achieve the same result.
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Mar 7, 2011
I am using forms authentication to authenticate users. Application has multiple folders and one of the folders has its own web.config
[Code]....
I want to redirect the user to "info.aspx" instead of "login.aspx"Root has the following web config
[Code]....
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Mar 10, 2010
I am currently having a spot of bother in something im trying to create. I want it so when a user who is in a certain role logs in they are directed to a certain page, and any other normal users are directed to another page.
I think i have this sorted via code but...
-The first time it will work, the 'admin' user will get directed to the appropriate page
-I then log out and log in as a normal user and get directed to the appropriate page
-then when i log out of that users account and back into the admin one i get directed to the normal users page instead.
-additional to this, I tried it on a different machine logging in as the admin user only to be redirected to the normal users page (is my session being stored somewhere?)
Ive traced through the problem and the user name and password being subbmitted are what they should be, yet it skips the true part of my IF statement for being in that role.
Here is my code I am using on the login form:
[Code]....
-When stepping through if seen it work and not work with the same values, I cant understand the logic of its inconsistency
the code i am using for the logout is (this is on my masterpage):
[Code]....
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Jun 4, 2010
I have a web application that is using siteminder for authentication.
I want to redirect to application that is siteminder enabled. This application might be using site minder forms authentication.
What parameters i need to pass to that application? And what details i will need of that application.
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Aug 12, 2010
we would like to redirect the user to a given page if the authentication to our SharePoint site fails (i.e. the standard windows login prompt pops up three times - we are using windows authentication). No matter what option we try it always ends up bringing the user back to a blank page.
We have tried writing a HttpModule (and catch the if Response.StatusCode = 401), which doesn't seem to fire any events if the user is not authenticated. We have tried writing a HttpHandler, but of course we can redirect the user if there is an error code but can't continue onto the desired site if not. We have tried doing the following in the web.config:
<customErrors mode="Off">
<error statusCode="401" redirect="http://social.msdn.microsoft.com"/>
</customErrors>
Which doesn't work, again taking us to a blank page.
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Dec 16, 2010
I am in the process of designing application in case user authentication if failed i need to redirect to default page (NT Authentication). Is there any way you can redirect the user on IIS if the user is fail go through the NT authenticaiton at IIS level.Options 1 : Always land the user to defalut page and validate there and redirect to site based on the access give the directory level access. I am looking if there any options to let the user to default page in case user access is denied.
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Mar 30, 2011
I have a logon/register control that is on several pages. Users are logged on with code: - FormsAuthentication.SetAuthCookie(Userid, False) Response.Redirect(Request.Url.AbsoluteUri) ' Round trip is necessary to complete logon
All this was working OK, except that there was a problem with Internet Explorer users: if their browser had the default privacy setting the authorization cookie was rejected. There was no message, but they were not logged on. See [URL] To try to solve this problem I changed to cookieless authentication, but now the logon control doesn't work. The problem is that after cookieless authentication the URL changes from
[URL]
However Request.Url.AbsoluteUri remains http://localhost:3641/TestGDB/login_pages/home2.aspx even after the logon, and so with cookieless authentication the user is not logged on as there is no authentication ticket in the redirect URL.
The problem is "solved" by changing the Redirect statement to Response.Redirect("~/login_pages/home2.aspx") which works perfectly for this particular page, but is obviously wrong when the control is on other pages.
How do I write "Response.Redirect(current page)"?
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Sep 3, 2010
What do I need to do in order to change an application from Forms Authentication to windows authentication?
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Feb 23, 2011
I have an issue with loginUrl parameter on Forms authentication. Forms Authentication always redirect unauthenticated users to ~/Account/Login ignoring the url configured into Web.Config.
This happend if i add reference to WebMatrix.WebData,WebMatrix.Data into main web.config file (system.web/compilation/assemblies). N.B.: Moving this reference to child web.config file (the one contained into View folder) error doesn't occour anymore
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Aug 14, 2010
The default document feature is turned off in IIS and here's the situation... My start page for my project say is A.aspx. I run the project and sure enough, A.aspx appears in the url of the browser. Like it should though, A.aspx finds no user logged in and redirects to Login.aspx like it should. A.aspx:
if (Session["UserStuff"] == null)
Response.Redirect("~/Account/Login.aspx");
The login.aspx shows up BUT when the user Logs in, the code:
FormsAuthentication.RedirectFromLoginPage(txtUserName.Text, true);
always redirects to "Default.aspx" and not "A.aspx"
I've examined FormsAuthentication.GetRedirectUrl and sure enough it returns "Default.aspx"
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Mar 3, 2010
I have a web app using forms authentication and I have restricted a folder so that only those with an administrator role can access it. I am controlling all of this through the web.config file and adding the proper location tags to restrict access.Currently the application is working fine. If I am logged in as a user and click the link to the administration section, I'm redirected to the login page once again. If I look at the URL, the ReturnUrl parameter is set properly.What I'd like to do is to display a message to the user indicating insufficient security privileges, or something to that effect so the user doesn't think they are getting logged out of the application prematurely or that the application isn't working.
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Jun 3, 2010
I have developed the authenticated rss feed using the basic http authentication for my site.I also have the admin module for the site which uses the Asp.net Forms Authentication .Both are in the same project.When i turn on the forms authentication module to None in my web.config.My rss feed authentication works fine(the browser pop up the dialog box for the username and password) and upon entering the username and password the rss feed gets displayed.But with forms authentication turn on when i click the rss feed link i am getting redirected to the administrator login page.
If i set my authentication mode to none than the feed works like dream but the admin module do not work as it uses forms authentication.
How can i resolve the conflict for that one.I am using the asp.net mvc filter on my feed contoller to pop up the dialog box for the username and password.
[Code]....
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Feb 16, 2011
I'm developing an internal booking sytem. Users log in to the sytem and can view existing bookings and search for bookings. They can also create new or edit existing bookings. When completing such actions I need a confirmation prior to completing the booking or updating the recorded. The confirmation is based on a reauthentication of the user.... in otherwords he needs to enter his passord again.
How can I achieve this? The system is internam and I'm using Forms Authentication. I an also using roles as som of the admin forms can only be viewed by administrators.
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May 15, 2010
I have an application that uses ASP.NET Forms Authentication. For the most part, it's working great, but I'm trying to add support for a simple API via an .ashx file. I want the ashx file to have optional authentication (i.e. if you don't supply an Authentication header, then it just works anonymously). But, depending on what you do, I want to require authentication under certain conditions.
I thought it would be a simple matter of responding with status code 401 if the required authentication was not supplied, but it seems like the Forms Authentcation module is intercepting that and responding with a redirect to the login page instead. What I mean is, if my ProcessRequest method looks like this:
[code]....
Then instead of getting a 401 error code on the client, like I expect, I'm actually getting a 302 redirect to the login page.
For nornal HTTP traffic, I can see how that would be useful, but for my API page, I want the 401 to go through unmodified so that the client-side caller can respond to it programmatically instead.
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Jun 29, 2010
In asp.net we specify the redirect url when using forms authentications like this:
<authentication mode="Forms">
<forms name="myApp" loginUrl="Login.aspx" protection="All" defaultUrl="default.aspx" path="/" requireSSL="false"/>
</authentication>
this means that when a user log in, will be redirected to "default.aspx" using this method
FormsAuthentication.RedirectFromLoginPage(IDTextBox.Text, RememberCheckBox.Checked);
Now is it possible to make the user choose which page to be redirected to prior to login? for example the user chooses from a list the page to login to prior to login then when authenticated be redirected to this page instead of the default.aspx page. is that possible and if so how can this be done?
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Nov 29, 2010
I am a beginner of asp.net..I currently have a login page with forgot password link button on the bottom of the screen. I am also using forms authentication to prevent an unauthorized user from accessing the other pages. The authentication seems to be working fine except for one thing. It prevents the user from accessing the password recovery page once the user click on the link button. How do I allow all users access to the login/password pages and also prevent them from viewing the other pages if they are not authenticated?The code below is to prevent from other anonymous view other pages without access. But i got no idea on how to allow them to access password recovery page...
<authentication mode="Forms">
<forms loginUrl="/Presentation/Display/Login.aspx" name=".ASPNETAUTH" protection="All" path="/" timeout="120" cookieless="UseDeviceProfile" slidingExpiration="true"/>
</authentication>
<!-- This section denies access to all files in this application except for those that you have not explicitly specified by using another setting. -->
<authorization>
<deny users="?"/>
</authorization>
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Apr 16, 2010
my application is running under asp.net 2.0 and in iis 5.0 (Windows XP) in my machine.config, i have the following setting
[code]...
whenever i go to my default.aspx page, it seems it doesn't redirect to login.aspx.
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Jul 14, 2010
This could be very straight forward for some of you, but I got caught up. I am doing very simple test - browsing from IIS Manager to see the default page or "under Construction", however I am being challenged to provide my login credential . When I provide my login credential, I am able to see the default page. I wanted to see the default page without providing my credential since Enable anoymous access + basic authentication I am simply wanted to see the default page asit is working on other servers except this one. I have included screen print to make sure may question is clear.
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Jan 4, 2011
What's the difference between Basic Authentication and Integrated Windows Authentication in IIS?
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Mar 10, 2010
I set authentication mode to Windows in the web.config and I enable Windows Authentication and disable the Anonymous Authentication in IIS 7 on win 7, but HttpContext.Current.User is always null.It works fine when I host the web app in IIS 6.0.
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Aug 9, 2010
I have a web farm web project, and want to make sure windows authentication is working well without any problem in web farm, can any one give me some web sites or information about that?
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Feb 8, 2010
Am going to develop authentication part in the web site. I want my authentication module should not be hacked by any one and also want in secure side.
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