2376
Docker daemon API secured with TLS
Docker Daemon (TLS)
What is port 2376?
Port 2376 is the TLS-secured version of the Docker daemon API. It requires mutual TLS with client certificates for authentication, making it significantly safer than port 2375. It is used for remote Docker host management. Even with TLS enabled, access should be restricted to trusted IP addresses or exposed only through a VPN.
Quick checks
$
nc -zv example.com 2376
$
nmap -p 2376 example.com
$
telnet example.com 2376