This document is a guide detailing the CIS IBM Db2 Benchmark Assessment, which aims to secure database environments by identifying internal security gaps often overlooked by standard external scans. The assessment focuses on critical internal configurations of the IBM Db2 database engine, ensuring that security defaults are in place to minimize exposure. Key categories audited include installation and patching, directory and file permissions, database configuration parameters, network and data security, authentication and authorization, and logging and auditing. The assessment not only enhances visibility into internal vulnerabilities but also facilitates historical tracking and trend analysis to prevent configuration drift. Additionally, it provides documented compliance with regulations such as PCI DSS, HIPAA, and GDPR by aligning with CIS standards. The guide emphasizes the importance of continuous security and the need for regular assessments to maintain a secure database environment.