Port 1521

Q: What is port 1521?

Oracle Database server (TNS Listener) Port 1521 is the default port for the Oracle Database TNS (Transparent Network Substrate) Listener. Oracle DB is widely deployed in large enterprises, banks, and government agencies. When exposed to the internet it is extremely dangerous — multiple publicly known exploits exist. Always place Oracle DB behind a firewall and restrict access to trusted application servers only.

Oracle

Oracle Database server (TNS Listener)

Port

1521

Protocol

TCP

Service

Oracle

Security

Dangerous

Full name: Oracle Database

What is port 1521?

Port 1521 is the default port for the Oracle Database TNS (Transparent Network Substrate) Listener. Oracle DB is widely deployed in large enterprises, banks, and government agencies. When exposed to the internet it is extremely dangerous — multiple publicly known exploits exist. Always place Oracle DB behind a firewall and restrict access to trusted application servers only.

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