Hi @edmundng20062,

There are a few possibilities with the most probable your network being down.

To check this, you can use your droplet’s console from your Control Panel. From there you can SSH to your droplet even with the network being down.

Once you are in, type in

service network restart

If it starts without a problem, great, you should be able to access the Droplet through putty or ping it without a problem. If however an error occurs, please type in

journalctl -xe

It will show you the exact error which is preventing your network from starting.

Regards,
KDSys