Internet UDP port 389 is primarily used by Lightweight Directory Access Protocol (LDAP). LDAP is a software protocol used for enabling anyone to locate organizations, individuals, and other resources such as files and devices in a network. Examples of software that use this port include Microsoft's Active Directory and Novell's eDirectory. OpenLDAP, an open-source implementation of the protocol, also uses this port.
UDP port 389 is associated with the Lightweight Directory Access Protocol (LDAP), which is used for accessing and maintaining distributed directory information services. In the past, hackers have exploited this port to perform DDoS attacks, leveraging the LDAP protocol's amplification capabilities. They send a small request to the port and receive a significantly larger response, which they direct towards their target, overwhelming their systems. Additionally, hackers have exploited vulnerabilities in the LDAP service to gain unauthorized access to sensitive information. They have also used port 389 to spread malware across networks.
