Redis Server Unprotected by Password Authentication

Solution :

Enable the 'requirepass' directive in the redis.conf configuration file.check if Redis is working on the servers.$ redis-cli ping
PONG

#requirepass "xxxxxxxx" -- change the password of the user and uncomment it.

/etc/init.d/redis-server status
/etc/init.d/redis-server stop
/etc/init.d/redis-server start

The above solution provided are for single server

What is the solution for the clusters of Linux and there are multiple configuration files given below?

config/redis/redis_121.conf

config/redis/redis_122.conf

config/redis/redis_123.conf

config/redis/redis_124.conf

config/redis/redis_125.conf