"Logon failure: unknown user name or bad password."

Question

0.00/5 (No votes)

See more:

hi,
I have used the below method to fetch user detail from active directory in different domain. when i am using the application in one of our domain which encounters errors, I am attaching the error message and code below

error =>"Logon failure: unknown user name or bad password."

string strName;
strName = Request.ServerVariables["AUTH_USER"];
string[] UserDetail = strName.Split('\\');
string Str = "LDAP://" + domainname;
DirectoryEntry entry = new DirectoryEntry(Str);
DirectorySearcher Dsearch = new DirectorySearcher(entry);
Dsearch.Filter = "(sAMAccountName=" + username + ")";
SearchResult sresult = Dsearch.FindOne();
DirectoryEntry dsresult = sresult.GetDirectoryEntry();
lblfname.Text = dsresult.Properties["givenName"][0].ToString();
lbllname.Text = dsresult.Properties["sn"][0].ToString();

Any suggestion/help on this would be really appreciated

Posted 14-Jun-12 23:05pm

murugesan.velusamy

Updated 14-Jun-12 23:15pm

v2

Add a Solution

2 solutions

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Sandeep Mewara · Answer 1 · 2012-06-14T23:26:00

Are you under the domain that you are trying to access? If not, that can be the reason to start with. Make sure that the website runs under the same domain account. Impersonation might help.

Also, see if the AD Username is properly specified: (DOMAIN\username)

In general, you get this error message when a logon attempt failed if the given password was bad, if the user account does not exist in that domain or if the password is expired, or if the password must be changed.

Refer this blog post for full details: MSDN Blog: Logon failure- unknown user name or bad password[^]

Have a look at this article too: Active Directory Object Navigator[^]

Stephen Hewison · Answer 2 · 2012-06-14T23:21:00

Solution 1

On the DirectoryEntry constructor there is an override which contains the credentials used to access the directory. You need to make sure the user you provide here has permissions to access the relevant directory entries.

C#

DirectoryEntry entry = new DirectoryEntry(path, username, password);

MSDN for directory entry:

DirectoryEntry Class[^]

MSDN for constructor

DirectoryEntry Constructor (String, String, String)[^]

Posted 14-Jun-12 23:21pm

Stephen Hewison

Comments

murugesan.velusamy 15-Jun-12 7:15am

where do i get these three parameters. will this work if the website runs in different domain.

Stephen Hewison 15-Jun-12 11:55am

If you're accessing a directory from a machine not within the domain then it may be problematic although you can prefix the username with the domain e.g. mydomain\myuser

If that doesn't work, you may need to get your infrastructure manager to set up a trust between the machine executing the code and domain with directory. Although that said, where the code was developed is irrelevant. It only matters where you're running the code.

You already have the first parameter it's your Str variable. You'll have to get the username and password from the owner of the domain your application is trying to change.