@Jefferson Thank you for reaching out to Microsoft Q&A.
I understand that you ordered ddos testing and found that your site crashed after that. To setup protection against DDOS- Please look at Azure DDoS Protection
It can be deployed with a web application firewall (WAF) as well. When deployed with a web application firewall (WAF), DDoS Protection Standard protects both at the network layer (Layer 3 and 4, offered by Azure DDoS Protection Standard) and at the application layer (Layer 7, offered by a WAF).
Here are some reference architecture scenarios for deploying DDOS protection.
Hope this helps. Please let us know if you have any further questions and we will be glad to assist you further. Thank you!
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