What ports are needed for LDAP?

What ports are needed for LDAP?

The default port for LDAP is port 389, but LDAPS uses port 636 and establishes TLS/SSL upon connecting with a client.

What port is secure LDAP?

port TCP 636
LDAPS communication occurs over port TCP 636. LDAPS communication to a global catalog server occurs over TCP 3269. When connecting to ports 636 or 3269, SSL/TLS is negotiated before any LDAP traffic is exchanged.

Is LDAP port 636 TCP or UDP?

A client starts an LDAP session by connecting to an LDAP server, called a Directory System Agent (DSA), by default on TCP and UDP port 389, or on port 636 for LDAPS (LDAP over TLS/SSL, see below).

How do I find my LDAP port?

Reference anandsarath’s suggestion, use NSLOOKUP on DC to find the port number used by LDAP.

Is LDAP unencrypted?

Currently by default LDAP traffic (without SSL/TLS) is unsigned and unencrypted making it vulnerable to man-in-the-middle attacks and eavesdropping. After the patch or the windows update would be applied, LDAPS must be enabled with Active Directory.

Can we change LDAP port?

You can’t change default AD port neither you can completely disable port 389 even though you enable LDAPS. The reason is application will try to use LDAP over SSL when enabled, on failing it will try to use 389 port.


LDAP is an application layer protocol that uses port 389 via TCP or user datagram protocol (UDP).

How do I find my LDAP URL and port?

Use Nslookup to verify the SRV records, follow these steps:

  1. Click Start, and then click Run.
  2. In the Open box, type cmd.
  3. Type nslookup, and then press ENTER.
  4. Type set type=all, and then press ENTER.
  5. Type _ldap. _tcp. dc. _msdcs. Domain_Name, where Domain_Name is the name of your domain, and then press ENTER.

How do I connect to a LDAP port?


  1. Log in to the IBM® Cloud Pak for Data web client as an administrator.
  2. From the menu, click Administer > Manage users.
  3. Go to the Users tab.
  4. Click Connect to LDAP server.
  5. Specify which LDAP authentication method you want to use:
  6. In the LDAP port field, enter the port that you are connecting to.

What are the different port numbers for LDAP?

Lightweight Directory Access Protocol or LDAP is used to authenticate and authorize users. LDAP is used in different infrastructures like Windows Domain, Linux, Network, etc. LDAP uses different port numbers like 389 and 636.

How to use the LDAP service in Zimbra?

This section will describe how to configure mail clients to use the LDAP service for looking up email addresses in Zimbra’s GAL. 1. Open Thunderbird. 2. Go to Edit then Preferences . 3. Under Composition, Addressing, tick the Directory Server box then click Edit Directories .

Which is IMAP client does Joruri mail use?

Joruri Mail is a browser-based IMAP client software. Make sure your environment is secure. Install script was expired and removed from repository. Copyright (C) Tokushima Prefectural Government, IDS Inc., SiteBridge Inc.

What is the port number of an ad server?

The AD port 636 port connection can be configured like below. Server is the IP address or domain name of the LDAP or AD server. Port is the port number of the LDAP which is by default 636 in this example. Connectionless will enable the UDP port where the default is TCP. SSL will try to connect in a secure way with the SSL/TLS encryption.