A DDoS attack is an malicious attempt to disrupt a targeted system or service by flooding it with fake requests to overwhelm the legitimate requests. To protect against such attacks, consider the following steps:
Secure your network by employing firewalls or other access control devices.
Install anti-malware, anti-virus, and intrusion protection systems to keep malicious activity withing your network to a minimum.
Audit your systems regularly for weak points by evaluating user access rights, server ports, protocols, and services.
Minimize the attack surface by disabling unnecessary services and scripts while keeping your software up-to-date.
Employ DDoS attack prevention solutions that utilize technologies such as scrubbing/filtering, DNS-based redirection, and rate limiting.
If an DDoS attack occurs, set up mitigation protocols so that the attack can be quickly identified and disabled.