DDos protection or how to avoid problems with violation ?

Summary: Today, my instance was disabled due to "Abusive Activity Identified." Recently, my instance had been the target of a DDoS attack on UDP ports, but over the last couple of days, the attack has stopped.

Yesterday, I initiated a debugging session with GDB and left it running overnight, waiting for the application to crash. In the morning, I received an email stating that my server was disabled due to policy violations.

Content:

Dear Oracle Support Team,

I have received a notification indicating that unusual and potentially harmful activity has been detected originating from my tenancy. The reported activities include Outbound Port Scanning, Brute-forcing, Web Exploitation, and/or DDoS. As a result, my instance has been disabled.