Web Application Firewall

Modern protections for modern applications

Enterprises rely on applications and APIs for growth--and with our world-class web application firewall, expanding attack surfaces and novel attacks never get in the way.

Our powerful web application firewall is integrated with the rest of our leading cloud-delivered application security portfolio.

2021 saw more than 20K vulnerabilities to exploit - the greatest number of vulns on record.

There are more than 5 billion stolen credentials on the dark web to fuel credential stuffing that leads to account takeover.

Attackers have web servers in the crosshairs as they are the top IT asset targeted - in 50% of attacks.

Companies need 16 days to patch - leaving attackers weeks to exploit vulnerabilities.

WAF layered defenses

Cloudflare managed rules offer advanced zero-day vulnerability protections.
Core OWASP rules block familiar “Top 10” attack techniques.
Custom rulesets deliver tailored protections to block any threat.
WAF Machine Learning complements WAF rulesets by detecting bypasses and attack variations of XSS and SQLi attacks.
Exposed credential checks monitor and block use of stolen/exposed credentials for account takeover.
Sensitive data detection alerts on responses containing sensitive data.
Advanced rate limiting prevents abuse, DDoS, brute force attempts along with API-centric controls.
Flexible response options allow for blocking, logging, rate limiting or challenging.

Stop account takeover

Prevent successful credential stuffing attacks from taking over user accounts.

Prevent data exfiltration

Stop data leaks to keep sensitive company data safe and private.

Block credential stuffing

See and stop abusive login attacks using stolen credentials.

Cloudflare WAF Advantages

Our global 142 Tbps network sees tens of millions of requests per second.

Complete application security from the same cloud network for an effective and uniform security posture.

Faster, easier security deployments for quicker mitigations and time-to-value.

A single Rust-based engine drives portfolio protections for no gaps in security.

Zero-day protections are in place fast for immediate virtual patching. Rules are deployed globally in seconds.

Our network's unparalleled visibility into threats yields the sharpest security and most effective machine learning.

“Thanks to Cloudflare protecting us from zero-day attacks, we have the time to enhance all of our internal security controls. Cloudflare has been invaluable in enabling us to take control of our security.”

Pedro Pereira
Head of Engineering

The best DDoS protection

All Cloudflare customers are shielded by 142 Tbps of DDoS protection.

Every server in every one of our 270 network locations runs the full stack of DDoS mitigation services to defend against the largest attacks.

World-class application security from Cloudflare

The Cloudflare web application firewall (WAF) is the cornerstone of our advanced application security portfolio that keeps applications and APIs secure and productive, thwarts DDoS attacks, keeps bots at bay, detects anomalies and malicious payloads, all while monitoring for browser supply chain attacks.