I have an Elasticsearch cluster (6.4.0) with one Master node and one data node .
Xpack is enabled in both machines. Both machines are working well .
Indexes are available in both machines
user:elastic and p/w: changeme in both machines.
Master node: (IP : 192.168.1.1)
Data Node: (IP: 192.168.1.2)
My Question is ,
" discovery.zen.ping.unicast.hosts" is the only one option for for restrict index creation from any out side machines to our cluster ?
Is there any other security mechanism for restrict index/replica creation from a non cluster ES machine in our cluster ?