Redis Client Authentication特性：开启强制认证后密码验证时机问询

Great question! When you have Redis client authentication set as required (via the requirepass configuration directive), you only need to provide the password once per connection, not with every single query.

Here's a clear breakdown of how it works:

• After a client establishes a TCP connection to the Redis server, you must send the AUTH <your-password> command before running any actual data operations (like GET, SET, or HGETALL). Skip this step, and Redis will return an error for every command until authentication is completed.
• Once authentication succeeds, the server marks that specific connection as verified. All subsequent commands sent over this connection will be processed directly—no need to re-send the password for every request.
• If the connection drops (due to network issues, client restarts, or server timeouts), you'll have to re-run the AUTH command when setting up a new connection.

Most popular Redis client libraries even handle this authentication step automatically for you: just input the password in the client's configuration, and the library will send the AUTH command right after establishing the connection, so you don't have to handle it manually.

内容的提问来源于stack exchange，提问作者Gabriel Garcia