The article doesn't really address stopping the traffic to server. I would suggest a CDN such as Cloudflare. It will not only limit your exposure by being behind their "firewalls" but it will also limit resource usage on your server including reducing bandwidth traffic. All in all however some greats bits of information in article that users can implement to secure their WordPress instance. Worth the time to read.
The article doesn't really address stopping the traffic to server. I would suggest a CDN such as Cloudflare. It will not only limit your exposure by being behind their "firewalls" but it will also limit resource usage on your server including reducing bandwidth traffic. All in all however some greats bits of information in article that users can implement to secure their WordPress instance. Worth the time to read.