What are the reasons for the refusal of the connection to the Redis database by redis-cli?

There are several reasons why the connection to the Redis database is being refused by Redis-cli:

1. If the Redis server is not started correctly or is not listening on the correct port, redis-cli will not be able to connect to the Redis database.
2. Remote access is not enabled by default for Redis servers, they only allow local connections. To allow connections from remote hosts, the ‘bind’ option in the Redis configuration file needs to be set to the server’s IP address or 0.0.0.0, while also disabling the protection mode.
3. Firewall or network issues: The firewall settings or network configuration on the server may be preventing redis-cli from connecting to the Redis server.
4. Incorrect authentication password: If the Redis server has enabled a password authentication, you need to provide the correct password when connecting with redis-cli. Otherwise, the connection will be refused.
5. Reaching the maximum connection limit: Redis server can be configured to allow a maximum number of connections. If the maximum connection limit has been reached, new connections will be denied.
6. Incorrect Redis server configuration may lead to redis-cli connection being refused.
7. Network delays or malfunctions may result in the rejection of connections by redis-cli.

When facing issues with connection being refused, you can solve the problem by checking the reasons mentioned above.