Defending Against DDoS Attacks with Source-Based Mitigations

In the realm of cybersecurity, distributed denial-of-service (DDoS) attacks represent a significant threat to the stability and availability of online services. Traditional mitigation strategies often focus on the destination address, filtering out malicious traffic aimed at a specific target. However, filtering traffic based on the source IP address offers unique advantages that can block attack traffic closer to the source and provide additional benefits such as stopping brute-force attacks.

Mitigating Outbound Attacks

One of the primary benefits of source-based DDoS mitigation is its ability to address outbound attacks originating within a service provider’s network. By implementing source-based filtering, service providers can identify and block malicious traffic close to its origin, preventing it from leaving their network. This not only protects external targets but also helps maintain the integrity and reputation of the service provider.

Blocking Inbound Brute-Force Attacks

In addition to reducing the effect of DDoS attacks, source-based mitigation is also effective in blocking inbound brute-force attacks. These attacks often involve repeated attempts to gain unauthorized access to systems by guessing passwords or exploiting vulnerabilities. By identifying and blocking traffic from known malicious IP addresses, service providers can protect their customers from these persistent threats. This approach ensures that customers’ systems remain secure and reduces the risk of successful breaches.

Reducing Collateral Damage

Traditional destination-based mitigation can sometimes result in collateral damage, where legitimate traffic is inadvertently blocked along with malicious traffic. Source-based mitigation, on the other hand, allows for more precise targeting of malicious sources, reducing the likelihood of disrupting legitimate users. This precision ensures that legitimate traffic can continue to flow unimpeded, maintaining the availability and performance of online services.

Enhancing Network Security

Service providers have a responsibility to ensure that their networks do not contribute to the broader problem of internet security. By implementing source-based mitigation, they can take an active role in preventing their customers’ devices from being used in attacks. This not only helps protect the wider internet community but also enhances the overall security posture of the service provider’s network.

How NETSCOUT Helps

Source-based mitigation provided by NETSCOUT’s Arbor Adaptive DDoS Protection for Arbor Sightline and Arbor Threat Mitigation System (TMS) offers several key benefits in the fight against DDoS attacks. By focusing on the origin of malicious traffic, service providers can effectively mitigate outbound attacks, block inbound brute-force attempts, enhance network security, and reduce collateral damage. As cyberthreats continue to evolve, adopting a comprehensive approach that includes source-based mitigation will be crucial for maintaining the resilience and reliability of online services.

Learn more about Adaptive DDoS Protection for service providers.