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DDoS Protection for E-Commerce: How One Attack Can Cost Millions

L

Lena Hoffman

Head of Threat Intelligence

Oct 8, 20247 min read

E-commerce sites face DDoS attacks most frequently during peak sales periods — when the cost of downtime is highest. Here's how to stay up when attackers strike.

For an e-commerce retailer doing $100,000/hour in peak sales, a 2-hour DDoS attack isn't just a technical problem — it's a $200,000 direct revenue loss, plus brand damage, SEO impact from crawl failures, and customer trust erosion that's harder to quantify.

When Attacks Happen

  • Black Friday and Cyber Monday — attack frequency spikes 300–500% vs baseline.
  • Flash sale launches — competitors or extortionists time attacks to your marketing calendar.
  • Peak checkout windows — even a 5-minute outage during a limited-time promotion is devastating.
  • Post-dispute retaliation — unhappy vendors or customers with technical knowledge.

What Attackers Target

Smart attackers don't just flood bandwidth — they target your most expensive endpoints. Product search APIs, cart operations, checkout flows, and payment gateway callbacks all hit your database. An HTTP flood targeting /search?q= with unique query strings bypasses your CDN cache and hammers your backend on every request.

Protection Strategy

  • Route all traffic through Akarguard's scrubbing proxy via DNS — same setup regardless of traffic volume.
  • Cache static pages and product listings at the proxy layer — attack traffic hits cache, not your origin.
  • Rate-limit cart and checkout endpoints per session — normal users don't checkout 200 times per minute.
  • Keep your origin server IP private — never exposed in emails, order confirmations, or error pages.

Pre-event checklist

Before every major sale: verify DNS is pointing to Akarguard, confirm origin IP isn't exposed, test your WAF rules against your own promotional URLs, and brief your on-call team on the DDoS response runbook.

L

Lena Hoffman

Head of Threat Intelligence at Akarguard

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