First of all, we will need to examine the type of DDoS attack. Then, we can search for logs to investigate as to if it is specifically happening from a single range of IP addresses or Multiple. For basic, we can null-route the IP address, harden the security on Software as well as hardware firewall. If this doesn't work, then we will prepare for Anti-DDoS Proxy shield which is 100% protection from DDoS attack.
