Why is the connection refused by the redis-server?

There is an instance of redis server running on centos 7.6, and it looks fine there (192.168.0.24:6379). I have tried to connect to this server by a client from another machine in same network (192.168.0.22). There is an incoming request from that client in tcpdump interfaces. The monitor of redis service doesn't show anything.. so it is obvious something block connection which make me suspect on firewall of course.. I did exactly what this article says.. no problem occurred during installation, But still I get message like: > "No connection could be made because the target machine actively > refused it 192.168.0.24:6379" **Note**: redis is running on port 6379