Authentication with requirepass in Redis - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is the purpose of the requirepass directive in Redis?

The requirepass directive sets a password that clients must provide to access the Redis server, adding a layer of security.

beginner

How do you enable password authentication in Redis using requirepass?

You add the line requirepass yourpassword in the Redis configuration file (redis.conf) and restart the server.

beginner

What command do you use to authenticate a client connection after requirepass is set?

Use the AUTH yourpassword command to authenticate the client before running other commands.

intermediate

What happens if a client tries to run commands without authenticating when requirepass is set?

Redis will respond with an error: NOAUTH Authentication required. and will not execute the command.

intermediate

Can you change the password set by requirepass without restarting Redis?

Yes, you can change it at runtime using the CONFIG SET requirepass newpassword command (requires current authentication).

What does the requirepass directive do in Redis?

A Enables SSL encryption

B Limits the number of client connections

C Sets a password clients must use to connect

D Enables data persistence

The requirepass directive sets a password that clients must provide to access Redis.

Which command authenticates a client after requirepass is set?

A AUTH password

B CONNECT password

C LOGIN password

D PASS password

The AUTH command is used to authenticate clients with the password.

What error does Redis return if a client runs commands without authenticating when requirepass is set?

A ERR wrong number of arguments

B NOAUTH Authentication required.

C ERR unknown command

D ERR permission denied

Redis returns NOAUTH Authentication required. when commands are run without authentication.

Where do you set the requirepass directive?

A In the Redis configuration file (redis.conf)

B In the Redis client

C In the operating system environment variables

D In the Redis database keys

The requirepass directive is set in the Redis configuration file.

Can you change the requirepass password without restarting Redis?

A No, the password cannot be changed

B No, you must restart Redis

C Yes, by editing the database keys

D Yes, with the CONFIG SET command

You can change the password at runtime using CONFIG SET requirepass newpassword without restarting.

Explain how Redis authentication works when requirepass is set.

Think about what happens before and after a client connects.

Describe the steps to enable and use password authentication in Redis.

Consider both server setup and client actions.