Master Nodes (etcd and controlplane nodes)


protocol direction port range purpose
tcp inbound 22 ssh server
80 http
443 https
6443 kubernetes api server
2379-2380 etcd server client api
10250 kubelet api
10251 scheduler
10252 controller
10256 kubeproxy
udp 8472 canal

Worker Nodes


protocol direction port range purpose
tcp inbound 22 ssh server
80 http
443 https
10250 kubelet api
10256 kubeproxy
30000-32767 nodeport services
udp 8472 canal