Port
Port 636 — LDAPS
Port 636 (TCP) is used by LDAPS. LDAP over TLS — encrypted directory access.
Port 636 at a glance
| Property | Value |
|---|---|
| Port number | 636 |
| Transport | TCP |
| Service | LDAPS |
| Category | Well-known port |
What it is used for
LDAP over TLS — encrypted directory access.
Security considerations
Secure replacement for port 389 binds.
See our full TCP/UDP port reference and learn how firewalls filter ports in the CyberOps course.
Frequently asked questions
What is port 636 used for?
Port 636 (TCP) is used by LDAPS. LDAP over TLS — encrypted directory access.
Is port 636 TCP or UDP?
Port 636 uses TCP.
Is it safe to open port 636?
Secure replacement for port 389 binds.
Related
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