Port 2375 · Docker Daemon (HTTP)

Port 2375 is Docker Daemon (HTTP), TCP.

Docker daemon REST API over HTTP — unauthenticated. Exposed to the network means full container/host compromise.

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-2375 protocol tcp port 2375

set rulebase security rules <rule-name> from <from-zone> to <to-zone> source any destination any application web-browsing service tcp-2375 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 :2375
• PowerShell Test-NetConnection <host> -Port 2375
• nmap nmap -p 2375 <host>

Related ports

• 2376 Docker Daemon (TLS)
• 1883 MQTT
• 2377 Docker Swarm
• 5000 Docker Registry
• 6443 Kubernetes API Server
• 9200 Elasticsearch HTTP

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