Internet TCP port 389 is commonly used by Lightweight Directory Access Protocol (LDAP), a protocol used to access and maintain distributed directory information services over an Internet Protocol (IP) network. Examples of software that utilize this port include Microsoft's Active Directory and Novell's eDirectory. OpenLDAP, an open-source implementation of LDAP, also uses this port. In addition, IBM's Tivoli Directory Server uses port 389 for its LDAP services.
TCP port 389 is commonly used for Lightweight Directory Access Protocol (LDAP) services. In the past, hackers have exploited this port to gain unauthorized access to sensitive information. They typically use a technique known as an LDAP injection, which involves manipulating the LDAP statements that are sent to the server, in order to modify, delete, or retrieve data. Additionally, if the LDAP server is not properly secured, hackers can use port 389 to perform a Denial of Service (DoS) attack, causing the server to become unavailable. Furthermore, unencrypted traffic on port 389 can be intercepted and read, leading to data breaches. Therefore, it is crucial to secure this port properly to prevent potential exploits.
