Port 9300 · Elasticsearch Transport

Port 9300 is Elasticsearch Transport, TCP.

Elasticsearch inter-node cluster communication — should be firewalled to the cluster nodes only.

Palo Alto

Create the service object for this port, then allow the App-ID on it. Restricting the rule to the port's service object keeps the rule working on a non-default port and stops the App-ID matching on other ports. Replace the placeholders with your own rule name and zones.

set service tcp-9300 protocol tcp port 9300

set rulebase security rules <rule-name> from <from-zone> to <to-zone> source any destination any application elasticsearch service tcp-9300 action allow

Risk and exposure

Rated high risk. Services on this port are commonly targeted by attackers. Keep it off the internet, or put it behind a VPN or a strict source allow-list, and monitor access.

Check it

• Linux ss -tlnp | grep :9300
• PowerShell Test-NetConnection <host> -Port 9300
• nmap nmap -p 9300 <host>

Related ports

• 9200 Elasticsearch HTTP
• 2377 Docker Swarm
• 2379 etcd Client
• 2380 etcd Peer
• 6443 Kubernetes API Server

← Search all ports