Port 2379 (TCP) — etcd client

etcd key-value store client API (Kubernetes state).

🔒 Runs locally — your input never leaves this browser tab

Contains cluster secrets. Never expose.

Check if port 2379 is open

On the server, see what is listening:

sudo ss -tulpn | grep ':2379 '

From another machine, test reachability:

nc -zv your-server.example.com 2379

With UFW (Ubuntu/Debian):

sudo ufw deny 2379

With firewalld (RHEL/AlmaLinux/Rocky):

sudo firewall-cmd --permanent --remove-port=2379/tcp && sudo firewall-cmd --reload