DDoS (Distributed Denial of Service) is a cyber attack where multiple compromised systems flood a target server with traffic, making it unavailable to legitimate users.

DDoS means Distributed Denial of Service - a type of cyber attack that uses multiple systems to overwhelm a target with traffic.

How does DDoS protection work?

DDoS protection works by filtering malicious traffic, rate limiting requests, and distributing load across multiple servers to maintain service availability.

DDoS Protection Guide

A quick, practical checklist to harden your site against floods and abusive traffic.

Updated 8/17/2025

Put an edge in front of your origin (WAF/CDN).

This soaks up L3/L4/L7 traffic and hides your server. Enable caching for static assets to reduce origin work.

Hide your origin IP with Secure DNS.

Keep DNS pointing to your edge, not your server. If you need custom DNS to mask origin, check our partner callitdns.com (launching soon).

Partner: callitdns.com — Secure DNS made simple (launching soon).

Lock in HTTPS.

Force HTTP→HTTPS redirects, add HSTS, and prefer HTTP/2/3 for resilience under load.

Add basic rate limiting.

Throttle high‑cost endpoints (auth, search, forms, APIs). Consider IP + token buckets and circuit breakers.

Reduce dynamic work.

Cache pages where safe, precompute results, and move heavy tasks to queues/background jobs.

Protect admin/origin endpoints.

Restrict by IP or auth, avoid exposing origin hostnames publicly, and block direct hits at the provider firewall.

Monitor and alert.

Track request rates, error spikes, and cache hit ratio. Alert on anomalies and auto‑scale where possible.

Run a free scan How to hide your origin IP WAF vs CDN

This guide is vendor‑neutral; use any reputable edge/WAF. We’ll publish a Secure DNS setup flow at launch with callitdns.com.