What Is a WAF?
A web application firewall (WAF) inspects HTTP requests before they reach your application and blocks malicious ones, such as SQL injection, cross-site scripting, bad bots, and abusive request rates. It works at the application layer (layer 7), using managed rule sets like the OWASP Core Rule Set plus custom rules for your app.
What Is DDoS Protection?
Distributed denial-of-service (DDoS) protection absorbs or filters floods of traffic meant to take your service offline. Network-layer attacks (layers 3 and 4) are handled by provider networks such as Cloudflare or AWS Shield. Application-layer floods that look like real requests need WAF rules, rate limits, and bot detection.
This Is For You If...
Your site slowed down or went offline during a traffic spike or attack
Bots are scraping content, stuffing credentials, or creating fake sign-ups
Your origin server is directly reachable from the internet
A customer, auditor, or insurer requires a WAF
You turned on a WAF but it blocks real users or does nothing at all
WAF vs DDoS Protection
Aspect | WAF | DDoS Protection |
Protects against | Web attacks: injection, XSS, bad bots, abuse | Traffic floods that overwhelm your service |
Network layer | Application layer (7) | Network and transport layers (3 and 4), plus layer 7 floods with WAF rules |
Needs tuning | Yes, to avoid blocking real users | Mostly automatic at the network layer |
Examples | Cloudflare WAF, AWS WAF, Azure WAF, Google Cloud Armor | Cloudflare, AWS Shield, Azure DDoS Protection, Google Cloud Armor |
What We Set Up
Edge Protection
Cloudflare, AWS CloudFront with AWS WAF and Shield, Azure Front Door, or Google Cloud Armor in front of your app, with SSL and caching configured.
Managed & Custom Rules
OWASP Core Rule Set and provider-managed rules, plus custom rules for your login, API, and admin paths.
Rate Limiting
Per-IP and per-path limits on login, sign-up, search, and APIs. See Rate Limiting & Bot Protection.
Bot Management
Challenge pages, Cloudflare Turnstile or CAPTCHA on sensitive forms, and rules for known bad bots.
Origin Lockdown
Your servers accept traffic only from the CDN or WAF, so attackers can't go around it.
Monitoring & Alerts
Dashboards and alerts for blocked attacks and traffic spikes. See Monitoring & Observability.
Tuning
Rules run in log-only mode first, false positives are fixed, and only then is blocking turned on.
Common Mistakes to Avoid
Instinct | Why It Doesn't Help | Do This Instead |
Turning on every rule in blocking mode | Real users and integrations get blocked | Start in log mode, tune, then block |
Adding a WAF but leaving the origin public | Attackers bypass the WAF by hitting the server IP | Allow origin traffic only from the WAF or CDN |
Treating the WAF as a code fix | It can't fix access control or business logic flaws | Fix the code too. See OWASP Top 10 Security |
Setting it up once and forgetting it | New features and attacks change what needs blocking | Review WAF logs and rules monthly |
What You Get
WAF and DDoS protection configured on your chosen provider
Managed and custom rules tuned for your application
Rate limits and bot protection on sensitive paths
Origin lockdown so the WAF can't be bypassed
Alerts and a dashboard for attacks and spikes
A runbook for what to do during an attack
How It Works
1. Assess
Review your traffic, hosting, DNS, and current exposure
2. Deploy
Put the WAF and CDN in front of your app
3. Observe
Run rules in log-only mode with real traffic
4. Tune
Fix false positives and add custom rules
5. Enforce
Turn on blocking, lock down the origin, and set up alerts
Why Codersarts
We configure protection around how your application actually works, from login flows to webhooks and mobile APIs, so security doesn't break features. For resilience beyond the edge, see Multi-Region Architecture.
Turnaround Time
A standard setup on Cloudflare or AWS takes 2 to 5 working days, followed by 1 to 2 weeks of log-only tuning before full blocking.
FAQ
Is Cloudflare's free plan enough?
It gives basic DDoS protection and some managed WAF rules. Paid plans add fuller managed rule sets, more custom rules, and advanced rate limiting, which most business apps need.
Do we need AWS Shield Advanced?
Most apps don't. AWS Shield Standard is included at no extra cost. Shield Advanced makes sense for high-value targets that need a dedicated response team and cost protection during attacks.
Will a WAF slow down our site?
Not noticeably. Edge WAFs usually make sites faster overall, because they also cache content and filter junk traffic before it reaches your servers.
We're under attack right now. Can you help?
Yes. Contact us immediately. Emergency setup on Cloudflare can usually be done the same day.
Is our project kept confidential?
Yes. Your data, code, and results stay confidential, and an NDA is available on request.
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