DDoS Protection
Definition
Defences against distributed denial-of-service attacks, which try to take your website offline by overwhelming it with traffic.
What is DDoS Protection?
DDoS protection defends against distributed denial-of-service attacks – coordinated floods of traffic designed to overwhelm your server and take your website offline. Protection systems identify attack traffic and filter it out while allowing legitimate visitors through.
Without protection, even small attacks can knock a website offline for hours or days.
Why DDoS Protection Matters
Business Continuity
If your website is your business, downtime means lost revenue. E-commerce sites particularly vulnerable.
Reputation Damage
Customers who can't access your site may not return. Competitors benefit from your outage.
Attack Accessibility
DDoS attacks are cheap to launch. Anyone with a grudge can rent attack services.
Increasing Frequency
DDoS attacks grow more common yearly as more devices become available for botnets.
Ransom Prevention
Some attackers threaten DDoS unless you pay. Protection removes their leverage.
Types of DDoS Attacks
Volume-Based Attacks
Flood your connection with raw traffic. Measured in gigabits per second.
Protocol Attacks
Exploit weaknesses in network protocols. Target routers, firewalls, and load balancers.
Application Layer Attacks
Target your web application specifically. Harder to distinguish from legitimate traffic.
How DDoS Protection Works
Traffic Analysis
Distinguishes normal traffic patterns from attack traffic through behavioural analysis.
Rate Limiting
Caps requests from individual IPs or regions.
Challenge-Response
Presents challenges (like CAPTCHAs) that humans pass but bots fail.
Traffic Scrubbing
Routes traffic through cleaning centres that filter out attack traffic.
Geographic Filtering
Blocks traffic from regions irrelevant to your business during attacks.
Anycast Distribution
Spreads incoming traffic across multiple global locations, diluting attack impact.
DDoS Protection Options
CDN-Based Protection
Cloudflare, Akamai, and Fastly include DDoS protection. Their global networks absorb attacks.
Dedicated DDoS Services
AWS Shield, Arbor Networks, Radware – enterprise-grade protection.
Hosting Provider Protection
Some hosts include basic DDoS mitigation. Quality varies significantly.
Levels of Protection
Basic
Included with many CDNs. Stops common volumetric attacks.
Standard
Blocks more sophisticated attacks. Usually adequate for most businesses.
Enterprise
Protection against the largest attacks. Required for high-profile targets.
Getting Protected
For most websites, using a CDN like Cloudflare (free tier available) provides adequate DDoS protection alongside performance benefits. Higher-risk sites should consider dedicated DDoS services.