Port 636 — LDAPS
Quick reference for TCP/UDP port 636, used by LDAPS. Includes what the service does, security guidance and related ports.
Port
636
Protocol
TCP
Service
LDAPS
What is port 636?
LDAP over TLS.
What port does LDAPS use?
LDAPS listens on port 636 by default.
Security guidance
Medium risk — open with care
Port 636 (LDAPS) can safely face the internet if you keep the software up to date, restrict admin endpoints, and use TLS where possible. Audit who can reach it and watch your logs.
Related ports
Frequently asked
What is port 636 used for?+
Port 636 is the standard TCP/UDP port for LDAPS. LDAP over TLS.
What port does LDAPS use?+
LDAPS listens on port 636 by default.
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