All 7 Redis Security & ACL questions
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How do you set a password to require authentication before clients can execute commands on a Redis instance? What is Redis ACL, and how does it provide more granular access control than a single shared password? How do you create a Redis ACL user with permissions restricted to only specific commands and a specific pattern of keys? What are Redis ACL categories, and how do they simplify granting permissions for groups of related commands? How would you design a comprehensive Redis ACL strategy for an organization with multiple applications and teams accessing the same Redis infrastructure? How do you secure Redis network communication using TLS encryption, and what performance considerations come with enabling it?
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What are some general security best practices to follow when deploying Redis, beyond just setting a password?

Intermediate

Answer

You should bind Redis to only the specific network interfaces that actually need access rather than all interfaces, disable or rename genuinely dangerous commands like FLUSHALL in production if they are not needed, keep Redis updated with the latest security patches, run Redis with the minimum necessary operating system privileges, and never expose a Redis instance directly to the public internet without proper authentication and network restrictions in place.
CONFIG SET bind '127.0.0.1 10.0.0.5'
rename-command FLUSHALL ''
Real-world example A team securing their production Redis deployment binds it only to their internal private network, renames the dangerous FLUSHALL command to prevent accidental data loss, and keeps their Redis version consistently up to date with security patches.

Common follow-ups: Why is exposing Redis directly to the public internet particularly risky?;How do you safely rename a command without breaking any application code that might depend on it?

Redis Architecture & Installation;TLS & Encryption in Redis
All 7 Redis Security & ACL questions