So I have followed the datastax tutorial all of today
But am still unable to get my cassandra cluster up and running.
This is how my yaml file looks for both my cassandra instances:
Cluster Name: 'MyCassandraCluster'
You need to put
listen_address: 220.127.116.11 rpc_address: 18.104.22.168
on one node and
listen_address: 22.214.171.124 rpc_address: 126.96.36.199
on another, not two IPs on both.
Also giving public IP to Cassandra is very bad idea in general - by default there's no authorization, anyone from public Internet can mess with your data.