Distributed Denial of Service attacks have grown dramatically in both frequency and scale, fueled by large botnets of compromised computers. What was once a nuisance has become a serious business risk, with attacks capable of overwhelming even well-provisioned network infrastructure and web servers.
Understanding Attack Vectors and Mitigation
Volumetric DDoS attacks flood the target's network connection with traffic, often exceeding several gigabits per second. Application-layer attacks target specific services with seemingly legitimate requests that consume server resources. Modern attacks frequently combine both approaches, making mitigation more challenging. Understanding the attack type is the first step toward effective defense.
On-premise mitigation is limited by your upstream bandwidth capacity. For attacks exceeding your connection capacity, work with your ISP to implement upstream filtering or consider a cloud-based DDoS mitigation service that can absorb attack traffic before it reaches your network. Services from providers like Akamai and Prolexic offer scrubbing centers that filter malicious traffic while passing legitimate requests.
Prepare for DDoS attacks before they occur by documenting your response procedures, establishing relationships with your ISP's security team, and pre-configuring your network devices with rate-limiting and blackhole routing capabilities. When an attack occurs, the ability to quickly implement mitigation measures can mean the difference between minutes and hours of downtime.