在公司可以連，回家裏不能用了。
看到一個解釋：
Verify that your network supports connectivity over the SSH port being used. Some public networks may block port 22 or custom SSH ports. You can do this by, for example, testing other hosts using the same port with a known working SSH server. This can help you determine if the issue isn’t specific to your Droplet.
https://www.digitalocean.com/docs/droplets/resources/troubleshooting-ssh/connectivity/#checking-your-firewall
把WiFi換成手機熱點就能連上了。/捂臉