Security :: Logon Failure Security Event 534 And Impersonation?
Oct 4, 2010
I have an app that uses impersonation to gain access to a database (on server separate from IIS). The app connects to the database using a trusted connection and seems to be working just fine. However, we get these logon failure events in the security event viewer:
[Code]....
It must have something to do with impersonation because the login failure is for the domain account which my app is impersonating under. But again, the app is working fine so I'm having a hard time figuring out how to stop these logon failures.
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Aug 16, 2010
I'm running IIS 6.0 on a Windows 2003 server and running an ASP.NET 4 application which connects to an SQL Server 2005 database on another server. I have my Default.aspx page set to Windows authentication with anonymous access disabled.
When I load up the page it asks for a username and password (as expected), I enter my credentials and it comes up with the following error:Login failed for user ''. The user is not associated with a trusted SQL Server connection.
If I add the following to my web.config file: <identity impersonate="true"/> then I get the following error:
Login failed for user 'NT AUTHORITYANONYMOUS LOGON'.
And if I add the <identity impersonate> tag set to true and with my username and password included it connects successfully.
I can't leave this in there as I want each user to connect as themselves, so why is the server not using the credentials that I enter when prompted to connect to the database ?
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Jan 11, 2010
I am developing an ASP.NET application that prints multiple images.I have a gridview with some data that I use to query the database for the image path.If the image is in one table, the document is sent to the printer, if not, I search another table for the document.When a run the application on my devel machine everything works fine, but when it runs from the production machine and it needs to search the image from the second table
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Sep 23, 2011
I used code below to save XML document but got an error said that
Logon failure: unknown user name or bad password.
Dim src00 As New XmlDocument
src00.Save("orderReportsorder.xml")
What is wrong? I check orderReports, my account has full control.
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Dec 1, 2010
in my asp.net application i am trying to write a file on a network system . i get the above errori have identityimpersonate="true"
at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)
at System.IO.FileStream.Init(String path, FileMode mode, FileAccess access, Int32 rights, Boolean useRights, FileShare share, Int32 bufferSize, FileOptions options, SECURITY_ATTRIBUTES secAttrs, String msgPath, Boolean bFromProxy)
at System.IO.FileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share)
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Mar 4, 2010
what is impersonation in asp.net? Is authentication and impersonation both are same ?I googled and found both are one type of security.
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Jan 8, 2010
I get about 5 minutes of inactivity before a logon box appears for a site I manage. Once logged in, our users must be able to stay logged on all day with no annoying logon popups. This started happening after a change i made to IIS6. We formerly had digest authentication and windows integrated authentication checked and everything worked fine but our users complained because they had to put creds in as <domainuserid>. We want to get rid of the domain requirement. To do this i unchecked windows integrated authentication and added the domain to the "Realm" text box. I can log in now without the domain, and everything works as before but I only get a few minutes before I have to relogon. I tried increasing the connection timout to 36000 and have keep alives checked on the web site property page. I also tried setting the web servers registry setting: HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesInetInfoParametersDigestContextCacheTTL to 36000 (ten hours). these changes had no effect that I can see.Our setup:we use SSL and have a test certificate that is expired We are hitting the site on our intranet with IE7 or IE8. The production version of this site is on the internet though.IIS6 on a 2003 serverkeep alives is checkedanonymous authentication is uncheckeddigest authentication is checkedwindows integrated authentication is uncheckedIISRESET was run after each change.
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Mar 13, 2011
We are in the process of building ASP.NET windows auth application. Where user need to interact with other internal system using the same single sign on. To interact application DB the system relies on App Pool account, for this we are every time doing the imporsanation to before every DB call. We can not have all useres added to DB, or create an SQL account. Which requires password and user to store in Web Config. We can encrypt it again you encrypt with what and etc ..So we have one windows account wihich same windows account used for our app pool as well.
I would like to know from the team is what is the best way to do the DB connection in this case?What is the implcations if we imporsanate the DB calls based on the app pool account ? Is it a best practice? I have read it creates its own thred and stuff, Do we need to worry ?
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Apr 13, 2010
I noticed impersonation is turned on by default in MOSS web configs. I tried disabling it but the web app returns an error. So my question, is it possible to disable impersonation in MOSS? If it is possible are there any special considerations I should be aware of?
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Jun 30, 2010
I've added the identity tag for impersonation. I've configured my site under IIS 5.1. The identity i've added is my domain username/password. But when I run any exe file from my asp.net file, it still runs under "aspnet" user name.
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Aug 6, 2010
suggest me a good Video to look at that can give me a start on how to use Impersonation?
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Dec 27, 2010
I am trying to use impersonation on an IIS server while I access Active Directory data. The following code works fine on the localmachine but when I put this same code on an IIS server I get an error: System.DirectoryServices.DirectoryServicesCOMException: An operations error occurred.
If I remove the top 4 lines and add my ID and passcode to the DirectoryEntry, everything works fine. I would prefer to not have my id and passcode anywhere on the web. Any ideas on how to fix this? Dim impersonationContext As System.Security.Principal.WindowsImpersonationContext
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Sep 2, 2010
I am using impersonation in my ASP.NET application to access network resources. It works fine when I run on my computer, however when I setup the site on IIS6, it does not work. Is there some extra configuration, I need make in IIS for it?1. I created an account "TestUser" with the privilege as "act as operating system" on a server that has the resources which I want to access.2. The impersonation works fine on my computer, when I run from visual studio. My computer is on the network under same domain where the "TestUser" is created.
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Sep 14, 2010
I am running ASP.MVC 2 with LINQ2SQL on IIS 7.5. I have enabled Windows Authentication with ASP.NET Impersonation. Application pool is running on different domain account [AsiaTestWebUser] is part of windows group [AsiaTestUserGrp]When i enable Asp.net impersonation on MVC web site. Once i hit LogOn from the default page , it's throwing me with below error message
[Code]....
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Mar 11, 2010
i am trying to create a strong name for assembly.....by giving the below code----
assembly:
AssemblyDelaySign(false)]
assembly:
AssemblyKeyFile(@"UsersABCDocumentsVisual Studio 2008ProjectscodeaccesssecuritycodeaccesssecurityinDebugABC.snk")]
assembly:
AssemblyKeyName("")]
when i am compiling project i am getting this error........
Error 1 Cryptographic failure while signing assembly 'C:UsersABCDocumentsVisual Studio 2008ProjectscodeaccesssecuritycodeaccesssecurityobjReleasecodeaccesssecurity.exe' -- 'Error reading key file 'UsersABCDocumentsVisual Studio 2008ProjectscodeaccesssecuritycodeaccesssecurityinDebugABC.snk'
-- The system cannot find the path specified. '
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Jan 14, 2010
I managed to user to perform multiple log on from other IE window session in my web application if the same log on is currently being used.Unfortunately I have problem to control multiple log on if the user is logging in using tab browsing in the same session. I know this is due to the same session Id but is there any way to trace down to the tab level within the same session?
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Sep 5, 2010
We will put the active directory logon when the user access the website, the user needs to fill in his user name and password.
How do we store/get the details of the logon user once the user is logged in?
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Oct 6, 2010
How to enforce logon hours validation
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Mar 22, 2010
I have created an intranet site in win 2008 server. Enabled Windows Authentication and disabled Anonymous. I want to get AD logon username(current win logon user).I used HttpContext.Current.User.Identity.Name and also tried User.Identity.NameI am accessing the site from client machine. I am not getting the client's logon user instead getting the server's logon user. But I want client's logon user only.I just want to get username. I dont need any login screens or bla blaWhen I run in my development system(XP), its working fine.
When I deploy to windows 2008 server, I am getting problem(Getting only the server's logon user instead of getting the client's logon user).So, problem in the server settings. So, any settings I need to set to get this worked?I enabled Windows Authentication for my site in IIS management window. Disabled Anonymous authentication.
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Oct 13, 2010
I have created an Intranet site using windows authentication based on role membership. It is working great. My Web.config is shown below.
<authentication mode="Windows" />
<roleManager enabled="true" defaultProvider="AspNetWindowsTokenRoleProvider" />
<authorization>
<allow roles="D820Developers, D820IT, D820Staff, D820Providers, D820Supervisors, D820Directors, D820Interns" />
<deny users="?"/>
</authorization>
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I have created a standard MS Login Page. However when I try to login on the page I get the message
Your login attempt was not successful. Please try again
I do not have a database (aspnetdb.mdf) storing user information but login against the active directory. Can you use the login form with windows authentication without a database?
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Jun 14, 2010
In my Web.config of my ASP.NET app I have set below:
<authentication
mode="Windows"/>
<identity
impersonate="true"
/>
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Oct 12, 2010
I have an Intranet which is on IIS 7.0. I want to authenticate my users and know who is logged in. What options do I have to set in IIS Authentication part that my users do not need to type their user name and password to login to Intranet. I have set the Authentication to Basic and Impersonation, but it is asking user name and password.
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Apr 9, 2010
I have a service account SvcAcc to manage contacts (add/update/delete contacts) for all the exchange users. I Impersonate using the below cmdlet to manage contacts but it also allows SvcAcc to perform other functions (such as send email etc) on behalf of the user.
cmdlet
New-ManagementRoleAssignment -Name:impersonationAssignmentName -Role:ApplicationImpersonation -User:serviceAccount
//impersonation code
service.Credentials = new NetworkCredential(ServiceAccountUserName, ServiceAccountPassword, domain);
service.ImpersonatedUserId = new ImpersonatedUserId(ConnectingIdType.SmtpAddress, userEmail);
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Mar 1, 2011
I have been looking for code samples on how to do impersation with forms authentication for the current logged on user. I have found samples on the internet and this site and most seem to refer to windows authentication not forms. I am wanting to run specific blocks of code under the current user's credentials to access lists of files on servers on the internal network and display them in the page.I found this article on MSN for using impersonation in various ways, http://support.microsoft.com/kb/306158 and I was able to use the section of code where it describes how to Impersonate a Specific User in Code. This works quite well with forms authentication but requires a service account in AD with login and password. One the same page is a sample of how to impersonate the authenticated user in code, but this only seems to work with windows authentication. As have all other samples I could find, such as the article here,http://www.codedigest.com/codedigest/9-identity-impersonate-at-code-level-in-asp-net.aspx. But trying those with forms authentication results in the error "Unable to cast object of ype 'System.Security.Principal.GenericIdentity' to type 'System.Security.Principal.WindowsIdentity'" Since there is no windows identity with forms authentication.Can anyone point to an article that describes how to do impersonation with forms authentication at the code level?
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Oct 19, 2010
I need to pass the credential of the logged in user to the DB, which is on a different server, is it that Impersation can only work if the DB is on the same machine as the web server? How can I flow the credential to the the server?
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