Why enable MongoDB authentication?
To prevent unauthorized access. Without authentication, anyone with network access to the database can read, modify, or delete data. Create users with specific roles (readWrite, dbAdmin) and never run MongoDB without authentication in production.
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More FAQs in MongoDB Security Best Practices for Node.js Production Apps
Enable authentication with specific user roles, use TLS/SSL for the connection, store the connection string in environment variables, use different databases per environment, hash passwords with bcrypt, validate data at the schema level, and backup regularly.
To encrypt the connection between Node.js and MongoDB, preventing eavesdropping. This is especially important for remote databases like Atlas, where the connection goes over the internet.
To keep credentials out of code. Hardcoding the connection string with credentials exposes them to anyone with repo access. Use dotenv and environment variables so secrets are not committed to git.
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