Open Redis port for remote connections

I can ping pong Redis on the server: # redis-cli ping PONG But remotely, I got problems: $ src/redis-cli -h REMOTE.IP ping Could not connect to Redis at REMOTE.IP:6379: Connection refused In config, I got the standard port: # Accept connections on the specified port, default is 6379. # If port 0 is specified Redis will not listen on a TCP socket. port 6379 So maybe I should open port 6379 on the remote Ubuntu machine? How do I do it?