Free Database Security Tools
Database security tools protect the data layer through access control, encryption, activity monitoring, and discovery of sensitive records. These free tools help small businesses secure the systems where the data an attacker most wants actually lives.
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pgAudit; MySQLTuner
Database SecurityPostgreSQL extension providing detailed session and object audit logging
MyDiamo
Database SecurityMyDiamo is a free opensource database encryption solution, available to all for non-commercial use. The commercial license is available for enterprises and organizations who desire extended features.
What Database Security Tools Do
Database security tools protect the layer where the data an attacker most wants actually lives. They enforce least-privilege access to tables and schemas, encrypt data at rest and in transit, log who queried what, discover where sensitive fields such as personal or health data sit, and check the database engine itself against a hardening benchmark.
Most small companies harden the application and leave the database with a shared admin password and no query logging. The free tools on this page address that directly: audit logging extensions, transparent encryption, configuration checkers for PostgreSQL, MySQL and MongoDB, and sensitive data discovery that tells you which columns need protecting first.
How to Choose a Database Security Tool
- Turn on audit logging first; without it you cannot investigate an incident or prove access control to an auditor.
- Encrypt at rest with keys held outside the database host, and require TLS for every client connection.
- Use a discovery tool to classify sensitive columns before deciding on masking or column-level encryption.
- Run the CIS Benchmark checker for your engine and fix the high-severity items before adding anything else.
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Free ISO 27001 Gap AssessmentDatabase Security Tools: Frequently Asked Questions
What does a database security tool actually do?
Depending on the tool: records every query and login for audit, encrypts stored data so a stolen backup is useless, finds and classifies sensitive fields, enforces role-based access at the table or row level, or checks the engine configuration against a hardening benchmark. Free tools usually do one of these well; combine two or three.
Do we need to encrypt the database if the disk is already encrypted?
Disk encryption protects against a stolen drive, not against an attacker with a valid connection or a leaked backup file. Database-level or column-level encryption, with keys managed separately, is what compliance frameworks and customer questionnaires usually mean by encryption at rest.
How do we prove database access control to an auditor?
With a list of database roles and who holds them, evidence of periodic review, audit logs showing privileged activity, and a policy that ties the two together. The free audit logging tools on this page produce the log; the access review is a quarterly task your security owner runs.
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