导航|地址|刷新
Cloudflare Web Application Firewall
图
Skip to contentDocumentation Index
Fetch the complete documentation index at: https://developers.cloudflare.com/waf/llms.txt
Use this file to discover all available pages before exploring further.



DocsDirectoryAPISDKsChangelog

Search

Log in






WAF

/




Overview

Get started

Concepts


Traffic detections


Overview

Attack score


Leaked credentials


Overview

Get started

Common API calls

Terraform examples

Example mitigation rules






Malicious uploads


Overview

Get started

Example rules

Common API calls

Terraform examples






AI Security for Apps


Overview

Get started

PII detection

Unsafe and custom topic detection

Prompt injection detection

Token counting

Example mitigation rules

Log mode vs production mode

Available fields





Bot score ↗


Threat intelligence


Overview

Get started

Example rules

Available fields










Custom rules


Overview

Create in the dashboard

Create via API

Create using Terraform ↗


Configure a rule with the Skip action


Overview

API examples

Skip options






Common use cases


Allow traffic from IP addresses in allowlist only

Allow traffic from search engine bots

Allow traffic from specific countries only

Block Microsoft Exchange Autodiscover requests

Block requests by attack score

Block traffic by geographical location

Block traffic from specific countries

Build a sequence rule within custom rules

Challenge bad bots

Configure token authentication

Exempt partners from Hotlink Protection

Issue challenge for admin user in JWT claim based on attack score

Require a specific cookie

Require known IP addresses in site admin area

Require specific HTTP headers

Require specific HTTP ports

Stop R-U-Dead-Yet? (R.U.D.Y.) attacks

Update custom rules for customers or partners





Custom rulesets






Rate limiting rules


Overview

Request rate calculation

Create in the dashboard

Create via API

Create using Terraform ↗

Find appropriate rate limit

Rate limiting parameters

Rule examples

Best practices

Troubleshooting






Managed rules


Overview

Deploy in the dashboard

Deploy via API

Deploy using Terraform ↗

Troubleshooting


Create exceptions


Overview

Add an exception in the dashboard

Add an exception via API






Log the payload of matched rules


Overview

Configure in the dashboard

View the payload content in the dashboard

Configure via API

Store decrypted matched payloads in logs


Command-line operations


Overview

Generate a key pair

Decrypt the payload content










Check for exposed credentialsDeprecated


Overview

How it works

Configure via API

Configure using Terraform

Test your configuration

Monitor exposed credentials events

Upgrade to leaked credentials detection






Rulesets reference


Cloudflare Managed Ruleset


Cloudflare OWASP Core Ruleset


Overview

Concepts

Evaluation example

Configure in the dashboard

Configure via API

Configure in Terraform ↗





Cloudflare Exposed Credentials Check Managed RulesetDeprecated

Cloudflare Sensitive Data Detection










Additional tools



Lists


Overview

Custom lists

Bulk Redirect Lists ↗

Managed Lists

Create in the dashboard

Use lists in expressions


Lists API


Overview

JSON object

Endpoints










IP Access rules


Overview

Create a rule

Parameters

Actions






Scrape Shield


Overview

Email Address Obfuscation

Hotlink Protection





User Agent Blocking

Zone Lockdown

Browser Integrity Check

Enable security.txt ↗

Privacy Pass

Replace insecure JS libraries

Security Level

Validation checks






Account-level configuration


Overview


Custom rulesets


Overview

Use the dashboard

Use the API

Use Terraform ↗






Rate limiting rulesets


Overview

Create in the dashboard

Create via API

Create using Terraform ↗






Managed rulesets


Overview

Deploy in the dashboard

Deploy via API

Deploy using Terraform ↗

Create exceptions ↗










Analytics


Security Analytics

Security Events





Security features interoperability


Reference


Alerts

Phases


Legacy features



WAF managed rules (previous version)


Overview

Troubleshooting

WAF managed rules upgrade






Rate Limiting (previous version)


Overview

Troubleshooting

Rate limiting upgrade





Firewall rules ↗

Firewall rules upgrade










Troubleshooting


Bing's Site Scan blocked by a managed rule

Fake bot detection blocking legitimate requests

Issues sharing to Facebook

SameSite cookie interaction with Cloudflare

Rule phase interactions

FAQ





Glossary


Changelog


Overview

Changelog

Scheduled changes

Historical (2024)

Historical (2023)

Historical (2022)






Agent resources


Agent setup ↗

Cloudflare Skills ↗

Code Mode MCP Server ↗

Domain-specific MCP Servers ↗MCP

WAF llms.txt ↗

WAF llms-full.txt ↗

Cloudflare Docs llms.txt ↗

Cloudflare Docs llms-full.txt ↗













Home

/WAF



Cloudflare Web Application Firewall


Last updated Apr 16, 2026|Copy as Markdown|View as Markdown|Agent setup

OverviewFeaturesAvailabilityRelated products





Get automatic protection from vulnerabilities and the flexibility to create custom rules.


Available on all plans

The Cloudflare Web Application Firewall (Cloudflare WAF) checks incoming web and API requests and filters undesired traffic based on sets of rules called rulesets. The WAF uses the Rules language, a flexible expression syntax that lets you filter traffic by request properties such as IP address, URL path, headers, and body content.

Learn how to get started.





------


Features


Custom rules

Create your own custom rules to protect your website and your APIs from malicious incoming traffic. Use advanced features like WAF attack score and malicious uploads detection in your custom rules.

Use Custom rules

Rate limiting rules

Define rate limits for incoming requests matching an expression, and the action to take when those rate limits are reached.

Use Rate limiting rules

Managed rules

Enable the pre-configured managed rulesets to get immediate protection. These rulesets are regularly updated, offering advanced zero-day vulnerability protections, and you can adjust their behavior.

Use Managed rules

Account-level configuration

Enterprise-only

Create and deploy rulesets to multiple Enterprise zones.

Use Account-level configuration

Security Events

Review mitigated requests (rule matches) using an intuitive interface. Tailor your security configurations based on sampled logs.

Explore Security Events

Security Analytics

Displays information about all incoming HTTP requests, including those not affected by security measures.

Explore Security Analytics


Availability



FeatureFreeProBusinessEnterprise
Attack scoreNoNoYes (one field)Yes
Leaked credentials detectionYes (one field)YesYesYes
Malicious uploads detectionNoNoNoPaid add-on
AI Security for AppsNoNoNoPaid add-on
Custom rulesYesYesYesYes
Rate limiting rulesYes (one rule)YesYesYes
Advanced Rate LimitingNoNoNoPaid add-on
WAF Managed RulesFree Managed Ruleset onlyYesYesYes
Sensitive Data Detection (SDD)NoNoNoYes
Account-level WAF configurationNoNoNoYes
Custom listsYesYesYesYes
Managed IP ListsNoNoNoYes
Email Address ObfuscationYesYesYesYes
Hotlink ProtectionYesYesYesYes
Replace insecure JS librariesYesYesYesYes
IP Access rulesYesYesYesYes
User Agent BlockingYesYesYesYes
Zone LockdownYesYesYesYes
Security Analytics (zone)YesYesYesYes
Security Analytics (account)NoNoYesYes
Security EventsYes (sampled logs only)YesYesYes
Security Events alertsNoNoYesYes
Advanced Security Events alertsNoNoNoYes



This is a summary of available features per Cloudflare plan. Refer to the documentation of individual features for more details.

------


Related products



DDoS Protection

Cloudflare DDoS protection secures websites, applications, and entire networks while ensuring the performance of legitimate traffic is not compromised.





Client-side security

Client-side security (formerly known as Page Shield) is a comprehensive client-side security solution to ensure the safety of your website visitors' browser environment.





Bots

Cloudflare bot solutions identify and mitigate automated traffic to protect your domain from bad bots.





NextGet started


Was this helpful?

YesNo

Edit pageReport issue




On this page

Overview

Features

Availability

Related products


Edit pageReport issue














Getting started
PlansContact salesPartnersFind a partnerStartupsUnder attack?Domain name search


Company
AboutCareersInvestorsPressPress kitGlobal network




Public interest
Project GalileoAthenian ProjectCloudflare for CampaignsProject FairshotImpact/ESG


Compliance
Compliance resourcesTrust HubData ProtectionResponsible AITransparency reportReport abuse




Resources
App innovation reportCloudflare RadarCase studiesStatusSupportEventsBlog


Developers
DocumentationLearning centerCommunity




Solutions
SSE and SASE platformCloudflare AI CloudAI SecurityFrontend Development PlatformMulti-Tenant Platform DevelopmentWeb Security Platform


Start BuildingLog In












© 2026 Cloudflare, Inc.

Privacy policy|Report security issues|Terms of use|Trademark
|
Your privacy choices








Docs




------
导航页 打开网址