not able to connect to redis.

I am doing the redis lab. when trying to connect to the redis using the IP address copied from the redis instance.

I will hang for some time then show not connected.

(venv) cs_sonu@retwisapp:~/venv/retwis-py/retwis$ redis-cli -h 10.19.20.19

Could not connect to Redis at 10.19.20.19:6379: Connection timed out

not connected>