Port 2379: etcd
Port 2379 is the client port for etcd, the distributed key-value store that Kubernetes uses to store all of its cluster state. Anyone who can read from etcd can effectively read every Kubernetes secret, so this port needs strict access control.
| Port number | 2379 |
|---|---|
| Service | etcd client API |
| Protocol | TCP |
| Category | Infrastructure & orchestration |
| Default encryption | No |
Frequently asked questions
What is port 2379 used for?
Port 2379 is the client port for etcd, the distributed key-value store that Kubernetes uses to store all of its cluster state. Anyone who can read from etcd can effectively read every Kubernetes secret, so this port needs strict access control.
Is port 2379 TCP or UDP?
Port 2379 (etcd) uses TCP.
Is port 2379 secure?
Port 2379 is not encrypted by default. Where possible, use an encrypted alternative or tunnel it over TLS or a VPN.
Should I open port 2379 on my firewall?
Only if you specifically need etcd. Expose it to the smallest set of trusted sources, and never open database or Windows-service ports to the whole internet.