Distributed Denial of Service (DDoS) Attack Mitigation Plan – IT
Environment
1. Document Control
This document defines the DDoS mitigation approach for the IT environment.
Organization:
Version: 1.0
Date:
Prepared By:
Approved By:
2. Purpose
The purpose of this document is to define the strategy, controls, and procedures used to
prevent, detect, mitigate, and respond to Distributed Denial of Service (DDoS) attacks
targeting the organization’s IT infrastructure.
3. Scope
This plan applies to internet-facing IT services, corporate networks, data centers, cloudhosted services, and third-party managed IT systems.
4. DDoS Threat Overview
Common DDoS attack types include volumetric attacks, protocol-based attacks, applicationlayer attacks, and reflection/amplification attacks.
5. Impact Assessment
DDoS attacks may result in service outages, degraded performance, loss of productivity,
financial impact, and reputational damage.
6. Mitigation Strategy
The organization adopts a layered defense approach including preventive controls,
monitoring, automated mitigation, and coordinated incident response.
7. Preventive Controls
- Network firewalls with DoS protection
- Rate limiting and traffic shaping
- Secure network architecture
- Cloud and ISP-based DDoS protection
- Hardened configurations for public services
8. Detection and Monitoring
DDoS attacks are detected using SOC monitoring, firewall alerts, traffic anomaly detection,
and performance monitoring tools.
9. Mitigation Procedures
Mitigation actions include blocking malicious traffic, rate limiting, activating ISP or cloud
scrubbing services, and isolating affected services.
10. Roles and Responsibilities
SOC Team: Detection and alerting
Network Team: Mitigation actions
Cybersecurity Team: Incident coordination
Management: Escalation and communication
11. Incident Response Workflow
Detect → Validate → Classify → Mitigate → Communicate → Recover → Review
12. Post-Incident Review
Post-incident activities include root cause analysis, tuning controls, updating policies, and
documenting lessons learned.
13. Review and Testing
This plan shall be reviewed annually and tested through tabletop exercises and simulated
attack scenarios.