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TCP
Vulnerable
2375 Docker API (Insecure)
Port 2375 exposes the Docker daemon without TLS and should not be reachable from untrusted networks.
Security Context
Port 2375 is high-risk when broadly exposed. Treat it as an attack-surface decision, not just a connectivity setting, and confirm whether the listener truly needs to be reachable.
- !Unauthenticated Docker API access can lead to full host compromise.
Nmap Check
Use a version probe first so you confirm whether the expected service is really what is listening on this port.
nmap -sV -p 2375 <host>Firewall Commands
UFW
sudo ufw allow 2375/tcpiptables
sudo iptables -A INPUT -p tcp --dport 2375 -j ACCEPT