Reference: LDAP Error Codes

Dealing with LDAP errors can sometimes feel like shouting into a void and only getting a number back in return. I’ve put together this troubleshooting guide to help you translate those cryptic result codes into actionable solutions. Whether you're seeing a "No Such Object" error or a "Invalid Credentials" warning, I’ve got the steps to help you find exactly what’s wrong. Let's decode these errors together.

Result Code 32: No Such Object

This is easily the most common error you’ll run into. It simply means I’m looking for something—a user, a group, or even the base directory—that the LDAP server says doesn’t exist. It’s like trying to find a file in a folder that isn't there. Usually, it’s just a small typo in your .env file.

Where is it happening?

I've found that this error typically crops up in one of four places:

1. Your Base DN is slightly off

If LDAP_BASE_DN points to an OU that doesn't exist, the whole search fails before it even starts.

# ❌ WRONG
LDAP_BASE_DN=ou=users,dc=example,dc=com

# ✅ CORRECT
LDAP_BASE_DN=dc=example,dc=com

How do I verify this? Try running a base search with ldapsearch. If it returns error 32, you know the base path is the culprit.

ldapsearch -H ldap://server:389 -x -D "cn=admin,dc=example,dc=com" -W \
  -b "dc=example,dc=com" -s base "(objectClass=*)"

2. The Bind DN (Service Account) is missing

If you’re using a service account and I can't find its DN, you’ll see this error immediately during the bind phase.

3. One of your Groups is incorrect

Are your LDAP_ADMIN_GROUP or LDAP_VIEWER_GROUP strings exactly right? Even a single missing comma will cause the server to report that the object doesn't exist.

4. The user is outside the Base DN

Sometimes the user exists, but they’re in an OU that isn't covered by your LDAP_BASE_DN. I can't find what I'm not allowed to see!

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How to Diagnose the Issue

When things go sideways, here is the process I follow to get the server back on track.

Step 1: Turn on the lights

First, I set my LOG_LEVEL to DEBUG in the .env file. This lets me see exactly which DN I’m trying to access when the error occurs. Have you checked your logs lately? They’re usually the best place to start.

Step 2: Identify the broken DN

Look at the logs and match the error message to your configuration:

• If it fails during "LDAP user search," check your LDAP_BASE_DN.
• If it fails during "Binding with service account," check your LDAP_BIND_DN.
• If it fails during "group membership check," check your group DNs.

Step 3: Verify manually

I always keep a template for ldapsearch handy. It’s the fastest way to verify if a DN actually exists without restarting the server every time.

ldapsearch -H ldap://SERVER:PORT \
  -x -D "BIND_DN" -W \
  -b "SUSPICIOUS_DN" -s base "(objectClass=*)"

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Other Common Result Codes

While Code 32 is the usual suspect, you might run into these other characters from time to time.

Code 34: Invalid DN Syntax

This means the format of your DN is broken. Did you forget a comma or include an extra space where it shouldn't be?

Code 49: Invalid Credentials

The username or password is wrong. This could be for the user trying to log in, or it could be the service account credentials in your .env. I always check if the service account has expired if I’m sure the password is correct.

Code 50: Insufficient Access Rights

I found the object, but the account I’m using doesn't have permission to read it. Make sure your service account has at least read access to the users and groups you’ve configured.

Code 52: Unavailable

The LDAP server is down or I can't reach it over the network. Is there a firewall blocking port 389 or 636? A quick telnet test can usually confirm this.

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Summary Table

Code	Name	What it means	My first fix
32	No Such Object	DN does not exist	Check the DNs in your .env.
34	Invalid DN Syntax	Format is broken	Check for missing commas.
49	Invalid Credentials	Wrong password	Check service account credentials.
50	Insufficient Access	No permission	Adjust your LDAP ACLs.
52	Unavailable	Server is down	Check network and firewall.