Connect from pod to master

Hello, I have 1 master 1 worker and 1 pod (run nginx image). from the pod, I can ping 8.8.8.8, google.com… but I can’t ping the master node or other machines which in same subnet with master node. What should I do?

Cluster information:

Kubernetes version: 1.18.2
Cloud being used: bare-metal
Host OS: ubuntu
CNI and version: calico