Question

100% cpu usage, DDOS attack.

I found 100% cpu usage, most likely from a DDOS attack, how do I fix this? https://www.img.in.th/images/c86d0492c91e0967f0d8da048d76df07.png


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Hi @littleelectricblueangler,

As mentioned using a CDN like CloudFlare is the best option there is.

If you don’t want to use one, however, you can try a more restrictive firewall like Fail2Ban. Check the following tutorial on how to configure and use it:

https://www.digitalocean.com/community/tutorials/how-to-protect-ssh-with-fail2ban-on-ubuntu-20-04

Hi there,

What you could do is to use a CDN provider like Cloudflare, which also includes free DDoS protection that you can enable in such situations.

I do have a script that you could use to automatically enable the Cloudflare DDoS protection, whenever the server CPU usage spiles up. You can follow the steps on how to do that here:

Bash Script to Automatically Enable Cloudflare DDoS Protection

Let me know how it goes!

Best,

Bobby