Port 9300

Q: What is port 9300?

Elasticsearch inter-node cluster communication Port 9300 is used for the Elasticsearch binary transport protocol, handling inter-node communication within a cluster including data replication, shard allocation, and cluster state synchronization. It must be accessible only between cluster nodes on a private network. An exposed port 9300 could allow an attacker to inject a malicious node into the cluster.

Elasticsearch-cluster

Elasticsearch inter-node cluster communication

Port

9300

Protocol

TCP

Service

Elasticsearch-cluster

Security

Dangerous

Full name: Elasticsearch Cluster Communication

What is port 9300?

Port 9300 is used for the Elasticsearch binary transport protocol, handling inter-node communication within a cluster including data replication, shard allocation, and cluster state synchronization. It must be accessible only between cluster nodes on a private network. An exposed port 9300 could allow an attacker to inject a malicious node into the cluster.

Related ports

← All ports