:389
(TCP/UDP)
Medium Risk
LDAP
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TCP/UDP — Security & VPN
Port Overview
Port Number
389
Service Name
LDAP
Transport Protocol
TCP/UDP
Category
Security & VPN
Security Risk
Medium
Port Range
Well-Known (0-1023)
What is Port 389?
Lightweight Directory Access Protocol. Accesses and manages distributed directory services like Active Directory. Used for user authentication and organizational lookups.
TCP/UDP
Security & VPN
Commonly Used
Security Considerations
Port 389 (LDAP) is classified as medium risk. While this service is commonly exposed, consider using encrypted alternatives where available.
Recommendation: Keep the service updated. Monitor logs for unusual activity.