Nodetool is an inbuilt CLI utility tool by Apache Cassandra for monitoring and managing Cassandra clusters. It even includes the ability to trigger commands on a remote node, as long as remote JMX has been enabled along with the required firewalls. Running a nodetool command remotely is very helpful as it wouldn't require SSH. But at the same time, it would be more prone to a security risk if endpoints are wide open to the public. The remote command can be triggered with the -h parameter through nodetool:
$CASSANDRA_HOME/bin/nodetool -h <ipAddress of host> ring
Based on the kind of installation, nodetool can be found in corresponding bin directories. Refer to the nodetool docs for further information at Apache-Cassandra: Nodetool Usage: http://Cassandra.apache.org/doc/4.0/tools/nodetool/nodetool.html.