Port 1521 — Oracle DB

TCP · Port 1521/TCP is used for Oracle Database connections. It allows clients to establish a connection with an Oracle database server, enabling queries and data retrieval. This port is critical for Oracle-based applications and services.

Port Number: 1521
Service Name: Oracle DB
Protocol: TCP
Common Software: Oracle Database

Security Notes

Review IANA registry for port 1521 usage. Apply principle of least privilege - only open ports that are required.

FAQ

What is port 1521 used for?

Port 1521 is used for Oracle DB. Port 1521/TCP is used for Oracle Database connections. It allows clients to establish a connection with an Oracle database server, enabling queries and data retrieval. This port is critical for Oracle-based applications and services. Common software: Oracle Database.

Is port 1521 dangerous to leave open?

Review IANA registry for port 1521 usage. Apply principle of least privilege - only open ports that are required.

How do I check if port 1521 is open?

Use nmap: nmap -p 1521 <target> or check locally: ss -tlnp | rg 1521