Port
Port 1521 — Oracle DB
Port 1521 (TCP) is used by Oracle DB. Oracle database listener.
Port 1521 at a glance
| Property | Value |
|---|---|
| Port number | 1521 |
| Transport | TCP |
| Service | Oracle DB |
| Category | Registered port |
What it is used for
Oracle database listener.
Security considerations
Restrict to application servers only.
See our full TCP/UDP port reference and learn how firewalls filter ports in the CyberOps course.
Frequently asked questions
What is port 1521 used for?
Port 1521 (TCP) is used by Oracle DB. Oracle database listener.
Is port 1521 TCP or UDP?
Port 1521 uses TCP.
Is it safe to open port 1521?
Restrict to application servers only.
Related
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