Most people have heard of firewalls in the context of home networks and corporate IT. A web application firewall (WAF) is a different beast — one specifically designed to protect websites from the most common and damaging attacks on the internet.
What a WAF Does
A WAF sits between your website and incoming traffic, inspecting every request before it reaches your server. It analyzes the patterns, content, and behavior of requests and blocks anything that looks malicious — without touching legitimate visitor traffic.
What It Protects Against
- SQL injection — attackers sending malicious database commands through input fields
- Cross-site scripting (XSS) — injecting malicious scripts into your web pages
- Brute force attacks — automated attempts to guess login credentials
- DDoS attacks — floods of traffic designed to overwhelm your server
- Malicious bot traffic — scrapers, scanners, and exploit kits probing for vulnerabilities
WAF Options for WordPress Sites
Plugin-Level WAF
Plugins like Wordfence and Sucuri include a WAF that runs within WordPress itself. These are better than nothing, but they only block attacks after the request has already reached your server — meaning server resources are still consumed.
DNS-Level WAF (Cloudflare)
Cloudflare’s WAF operates at the DNS level, intercepting traffic before it ever reaches your server. This is more effective and doesn’t consume your server’s resources. Cloudflare’s free plan includes basic WAF rules; paid plans offer more granular protection.
Server-Level WAF
Some hosting providers — including SERVERIZZ — include server-level WAF protection through tools like Imunify360, which operates at the web server layer and handles protection across all sites on the server simultaneously.
How to Know if You Have One
Check your hosting provider’s documentation or control panel. If you’re on Cloudflare, your WAF settings are in the Security tab of your dashboard. If you’re using Wordfence or Sucuri, the WAF status is visible in the plugin dashboard.
If you’re not sure — you probably don’t have one. SERVERIZZ includes server-level WAF protection on all hosting plans. Let’s make sure you’re covered.