How To Detect Authentication Timeout
Dec 9, 2010
I've seen multiple articles like this one that explain how to detect that a user's session has timed out. And for clarity's sake, these articles are referring to the timeout value defined by this web.config line:
<sessionState mode="InProc" cookieless="UseDeviceProfile" timeout="120" />
Not to get into that method too much, but this involves checking that Session.IsNewSession is true and that a session cookie already exists. But I haven't seen any articles on how to detect authentication timeout -- the one defined by this web.config line:
<authentication mode="Forms">
<forms loginUrl="~/Home/Customer" timeout="60" name=".ASPXAUTH" requireSSL="false" slidingExpiration="true" defaultUrl="~/Home/Index" cookieless="UseDeviceProfile" enableCrossAppRedirects="false"/>
</authentication>
Multiple articles online, including this SO post, have said that your Session timeout value should generally be double your Authentication timeout value. So right now, as above, my Session is 120 and my Authentication is 60. This means that I'll never get in a situation where the Session has timed out, but the user is still Authenticated; if the user ever times out, it will be due to Authentication, not Session.
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Apr 13, 2010
I am trying to detect a session state timeout in my asp.net application and am unable to do so. I have a base class that derives from System.Web.UI.Page as follows:-
public class BasePageSessionExpire : Page
{
override protected void OnInit(EventArgs e)
{
base.OnInit(e);
if (Context.Session != null)
{
if (Session.IsNewSession)
{
string szCookieHeader = Request.Headers["Cookie"];
if ((null != szCookieHeader) && (szCookieHeader.IndexOf("ASP.NET_SessionId") > 0))
{
Session.Abandon();
Response.Redirect("~/SessionExpired.aspx",true);
}
}
}
}
}
All the pages I need session state checking on derive from this base class instead of "System.Web.UI.Page". Also, all these pages have EnableSessionState="True". I have a blank Session_Start() method in my global.asax file if that is relevant at all.
For some reason after the first request, the "Session.IsNewSession" property is always false. It is true only for the first request and then is always false. I have my timeout set to 1 minute. The session never seems to timeout. What am I missing here ?
Also I have implemented a state server in SQL Server 2008. This is not an in-proc session state implementation.
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May 28, 2010
There is a thread addressing this but it does not provide the type of answer I am seeking.
When login page is requested due to timeout, there is query string parameter "ReturnUrl" which is very nice and I want to keep that. However, timeout is not the only scenario that generates that parameter. If a restricted page is requested before the user is authenticated, such parameter exists too.
Here is my question is, how can the timeout be detected in the code-behind of the login page assuming the login page is directed to by IIS not by code-behind?
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Jul 21, 2010
I have a button that executes a script using AJAX.Normally when a session is still active the script will return some data that will be placed inside the parent page.If the session expired the AJAX will return the login screen which gets placed inside the parent page which looks really odd.How would I be able to detect a session timeout and do a postback on the parent page?
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Dec 20, 2010
I'm implementing an authentication timeout detection mechanism per a previous question and answer of mine here. I've implemented an HTTP module that uses the AuthenticateRequest event to run code to capture whether the authentication period has expired. The code to do this is below:
public class AuthenticationModule : IHttpModule
{
#region IHttpModule Members
void IHttpModule.Dispose() { }
void IHttpModule.Init(HttpApplication application)
[Code]....
The problem is that, once the authentication period has expired (I set it to 1 min to test), there is no longer a forms cookie (see comment in code). This means that the authentication cookie will be null, and I won't make it past the null check in my code. But there's a convenient "Expired" property for a FormsAuthenticationTicket that I feel like I should be checking to see if the period is expired. But how do I get that far if the cookie is no longer there? Is it reasonable to assume the authentication period has expired if there's no longer a forms cookie?
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Mar 23, 2011
We currently have a set of ASP.NET application and we are migrating them to use Windows Authentication (used to be form Authentication). We will eventually let the user to connect to our site entering Windows Authentication credentials. When we tested within our system across different domains, we noticed that the authentication session seemed to be cached even with the server session had timed out. In other words, once the user logged in and keeped an Internet Explorer window up (didn't even have to be in ourapplication page), the user could always navigate back to our application without being prompted for security login again. We had our site included in the Trusted Site list of the IE browser.Is that the expected behavior for ASP.NET Windows Authentication? If that is the case, is there a way to end the Authentication cache when the users leave their IE windows idle.
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Nov 19, 2010
I have a question regarding Form Authentication Session Timeout
I have a form authentication and i have set the session timeout in my webconfig.
After I login to website using my form authentication, the session is not timing out even after i login more than 30 minutes.
It seems i'm still authenticated and can access everything.
Is it normal ? I thought if we set the timeout in webconfig it will automatically log you out because the session expire.
<authentication mode="Forms">
<forms name=".authentication" loginUrl="Login.aspx" defaultUrl="Default.aspx" protection="All" timeout="30" path="/" requireSSL="false" slidingExpiration="true" enableCrossAppRedirects="true" domain="" />
</authentication>
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May 18, 2010
What is the difference between a abandon Session and a cookie timeout, what if the session is abandon and the cookie is still alive, is that can lead to a problem?
<sessionState timeout="1" />
<authentication mode="Forms">
<forms loginUrl="login.aspx" timeout="1" />
</authentication>
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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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May 13, 2010
I have 3 seperate applications (under the same domain) for which I use Forms authentication with single sign-on.
The 3 applications have different session timeout periods. I was on various articles that when we use forms authentication and specify the loginurl in the <Forms> tag in the web.config, it should automatically get redirected to the login page, when the session timesout. But in my case, it doesn't happen, I think because of different timeout values.
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Jul 2, 2010
here's what I have:
My asp.net 3.5 app uses Forms Authentication.
I create an authentication cookie (ticket) with an expiration date of one day.The cookie'sIsPersistent is set to true.
I do not use any session variables.
Session timeout is the default 20 minutes.
Here's the problem:
When the session times out in 20 minutes, the user is redirected to the logon page even though the authentication cookie has not expired.
Why does this happen? I thought the cookie and the session worked independently. Shouldn't the user remain logged in as long as the cookie hasn't expired?
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Sep 13, 2010
I tried to take advantage of jQuery AJAX call to enhance user experience but I am facing a tricky problem.
When the user does nothing for a period of time, e.g. 30 minutes to reach authentication timeout, making AJAX call becomes the problem. The server side will return login page and display in my target div section. The simplest solution I can think of is to inject a dummy tag in login page, and when detecting such dummy tag then use javascript to redirect to login page. But this means that I have to do that every time I make AJAX call.
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Jan 27, 2011
We have the timeout value set to 120 in our <form> tag within the web.config. We do not have a session timeout set.. and we have various connection strings.
We are having a problem where a session variable will disappear (become NULL) .. but, the form evidently remains 'open'.. or no re-login is required..... so, my question(s):
1. what is the relationship between form timeout and session timeout
2. how do I set session timeout
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Apr 4, 2011
I am trying to build an ASP.NET site that allows each user to set their own session timeout value. Basically from the user's perspective if they set their timeout value to 30 then that means that after 30 minutes of inactivity they are required to re-authenticate. If they set their timeout value to 0 then that means that they can leave the browser open as long as they want and their session never expires - they never have to re-authenticate. This is different than "remember me" functionality. If they close their browser they will have to re-authenticate.
Currently I am using Forms Authentication in my application and I have one object that I am storing in ASP.NET session. This object is a custom User object that has a number of different pieces of information about the current user.
What code would I need to write so that after successful login, the system has the proper authentication ticket and the proper session expiration value? I keep thinking I have this working and then I notice weird time outs where the system seems to think I am authenticated but my session has expired.
Currently on my login page I am using an ASP.NET login control. i have custom code in the Login_Authenticate event to authorize the user. Then I have the following code in the Login_LoggedIn event to set the auth ticket.
[code]....
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Dec 29, 2010
The constructors for manually creating FormsAuthenticationTicket objects force us to set an "expiration" value, and this value overrides the "timeout" setting in web.config in my tags, which is not what I want, because now the user doesn't timeout. The "session" just expires at the given time.I need to manually create my ticket for UserData reasons, and it is just the way I decided to build my app. I guess I could spend a whole lot of time and redo the way my app. authorizes, and store the "userdata" elsewhere... but this seems extremely tedious for something so small..Is there anyway to manually create an Auth Ticket and still maintain timeout settings?! And by timeout, I mean resetting the timer on user activity. Not a fixed timeout!
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Apr 26, 2010
I have a web page that refreshes every one minute and the solution times out every 20 minutes, would the one minute refresh be considered as user activity and therefore doesn't time out every 20 minutes? And if not, how do I convince the page that the one minute refresh is like a user activity and it shouldn't time out?Here is the javascript to refresh every one minute:
[Code]....
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Jul 12, 2010
I have set the authentication timeout and session timeout in web.config is 100 (in minutes).LoginName control shows logged in username and logout link.After 15-20 min LoginName control shows nothing and login link regardless my authentication timeout(which is 100).I can work on that page till server trip is not happen.
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Apr 1, 2010
I am using asp.net mvc and jquery to make ajax requests and when the session times out after an ajax request the full sigin page gets loaded into my ajax div.
How can I display a modal popup instead of making a redirect when a session times out?
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May 31, 2010
I am trying to force to show to the Logon popup when the session is timeout in Integrated Windows Authentication Enabled website. The session_timeout is firing during the session timeout, but the User.Identity.IsAuthenticated is true. How force to use the Windows Logon Screen when the session is timeout.
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Apr 13, 2010
In our application we are using forms authentication, we have given defaulturl also in the config file. But the problem is that it is not getting redirected to the default url when the session timeout is occuring.
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Dec 3, 2010
I am building a web app that is limited to one database, therefore I cannot use the ASP.NET config tool. As a quick means of getting this app online, I tried to use a simple session variable. The login page verifies the user's credentials, and if they pass, it sets the session variable to a certain value. All other pages check in the page_load event whether or not the session variable is equal to that value. The problem is that once being logged in for a short while and sending and recieving some data, the session variable resets, and I'm returned to the login page to repeat the process. Here's the basic code from my webforms:
[code]....
Is there some setting I need to change in the web.config file to adjust the cookie timeout or is that only for the config tool authentication methods?
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Jan 20, 2010
Hopefully I am posting this in the correct forum.
I am having a problem with my ASP.Net Web application. The application is developed using vb.net and is linked to a SQL Server database. Let me explain how the application works and the problem I am experiencing. The system is an online web app which allows registered users to create a CV online. One of the pages within the app gives users the chance to add a cover note to their CV. The page that allows them to do this consists of only a textarea control and a button control. The textarea allows users to input up to 4,000 characters.
Once the user clicks the 'Save' button to save their cover note info, the following code then executes.This code checks to see if the CV already has cover note info, if it does, then the application runs an update statement, otherwise, it runs an insert statement.The table within the database which records the cover note information is called tbl_covernote and has three columns, covernote_id (int and autoincrement), cv_id(int), covernote_text (nvarchar(max)).
The error which occurs sometimes is as follows:
Dim dr As SqlDataReader
Dim param(0) As SqlParameter
Finally [code]...
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Feb 15, 2010
I have an ASP.Net application that makes an AJAX request to retrieve at report. The report can run for a long time so I set the asyncpostbacktimeout in <asp:ScriptManager /> to 600. However, when I try to run the report, if it runs for longer than 90 seconds it fails to come back. I can see in the IIS logs that the POST request succeeded with a 200 status and I can see the time taken is much less than 600.
The web page dutifully waits for the entire 600 seconds before returning with a timeout error:
Error:
Sys.WebForms.PageRequestManagerTimeoutException:
The server request timed out.
Is there any setting I should be checking in IIS? Connection timeout is 900 seconds.
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Feb 1, 2010
The session state timeout is set using this web.config element
<sessionState mode="InProc" cookieless="false" timeout="120" />
The forms auth is configured using this web.config element
<system.web>
<authentication mode="Forms">
<forms loginUrl="Login.aspx"
protection="All"
timeout="30"
name=".ASPXAUTH"
path="/"
requireSSL="false"
slidingExpiration="true"
defaultUrl="default.aspx"
cookieless="UseDeviceProfile"
enableCrossAppRedirects="false" />
</authentication>
</system.web>
What is the difference between the timeouts specified in each of these elements? If both are different, how would it work?
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Jul 29, 2010
I have a page of each every click has ajax call to my server (hence, the ASP extends the session)
I have ASP.NET session set to Xmin. I want when X+1 min expires, I have expiration page. what I did was to set the JS timer to validate every x+1min to see if the session expired (the problem is that the JS and the ASP session timeouts are not synced)
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