MongoDB Security Part 1 - Design and Configuration is a comprehensive guide to securing access to data in MongoDB deployments. The security model consists of four pillars: authentication, authorization, auditing, and encryption. To secure your deployment, it's essential to design the application to work in a multilayer fashion, isolate the database server from the web application, and configure firewall rules to limit network access. Enabling access control through user authentication and authorization is crucial, with options including Kerberos and LDAP authentication, x.509 certificates, and SSL/TLS data transport encryption. Additionally, enabling storage encryption using MongoDB's Encrypted storage engine provides an extra layer of defense. It's also important to disable unused exposed interfaces, such as server-side scripting, and use only the MongoDB wire protocol on production deployments. The auditing framework logs all access and actions executed against the database, allowing administrators to construct and filter audit trails for any operation. By following these steps and using MongoDB Enterprise Advanced, you can ensure a secure database layer that protects your data from unauthorized access.