How can I secure Redis Cluster

[Lax kota]

In stand alone Redis I could have it authenticate by configuring 'requirepass' in redis.conf and have redis-cli use AUTH command to authenticate.

Can I leverage similar thing for Redis cluster too with redis-trib.rb? 

with requirepass configured on the cluster nodes, I keep getting 'Sorry, can't connect to node' error. 

If this option is not viable is there any way I can secure Redis Cluster?

Thanks

Lax