Ensure there is no unrestricted inbound access to TCP port 1521 (OracleDB)

Security & Compliance

TCP port 1521 is the default port used by Oracle Database for database services. Unrestricted inbound access to this port can allow attackers to perform various attacks like SQL injection, buffer overflow, and others, which can lead to unauthorized access to the database and data theft.


To ensure there is no unrestricted inbound access to TCP port 1521 (OracleDB), follow these remediation steps:

  1. Identify the systems with open port 1521 using a port scanner or network discovery tool.
  2. Review the firewall rules and access control lists (ACLs) to ensure that inbound traffic to port 1521 is restricted only to the necessary systems and applications.
  3. Configure the firewall and ACLs to block incoming traffic to port 1521 from external and unauthorized sources.
  4. Implement network segmentation and isolate the Oracle database servers from the public network.
  5. Enable Oracle Database Security features like authentication, authorization, and encryption to enhance the security of the database.
  6. Ensure that the database software and patches are up-to-date and implement regular vulnerability assessments and penetration testing to identify and remediate security weaknesses.
Enforced Resources
Note: Remediation steps provided by Lightlytics are meant to be suggestions and guidelines only. It is crucial to thoroughly verify and test any remediation steps before applying them to production environments. Each organization's infrastructure and security needs may differ, and blindly applying suggested remediation steps without proper testing could potentially cause unforeseen issues or vulnerabilities. Therefore, it is strongly recommended that you validate and customize any remediation steps to meet your organization's specific requirements and ensure that they align with your security policies and best practices.