Overview
About
Custom Rules
Custom Firewall rules
Create Custom Firewall rules in the dashboard
Create Custom Firewall rules via API
Configure a rule with the Skip action
API examples
Skip options
Rate Limiting rules
Determining the request rate
Create Rate Limiting rules in the dashboard
Create Rate Limiting rules via API
Rate limiting parameters
Common use cases
Manage Custom Rules in the dashboard
Managed Rulesets
Cloudflare Managed Ruleset
Cloudflare OWASP Core Ruleset
Cloudflare Exposed Credentials Check
Deploy Managed Rulesets for a zone
Deploy rulesets via API
Defining WAF exceptions
Define WAF exceptions in the dashboard
Define WAF exceptions via API
Log the payload of matched rules
Configure payload logging in the dashboard
View the payload content in the dashboard
Configure payload logging via API
Command-line operations
Generate a key pair
Decrypt the payload content
Automated exposed credentials check
How exposed credentials checks work
Configure exposed credentials checks via API
Test your exposed credentials checks configuration
Monitor exposed credentials events
Analytics
Free plan
Paid plans
Additional information
Alerts
Change log
Scheduled changes
2022-02-28
2022-02-21
2022-02-14
2022-01-24
2021-12-16 – Emergency
2021-12-14 – Emergency
2021-12-10 – Emergency
2021-11-01
2021-10-25
2021-10-19
2021-10-04
2021-09-06
2021-09-01 – Emergency
2021-08-31
2021-08-23
2021-08-16
2021-07-26
2021-07-19
2021-07-01 – Emergency
2021-06-21
2021-06-14
2021-06-07
2021-06-01
2021-04-21 – Emergency
2021-04-19
2021-03-22
2021-03-08
2021-03-06 – Emergency
2021-03-05 – Emergency
2021-03-01
2020-12-14
2020-12-02
2020-11-16
2020-11-05 – Emergency
2020-11-04 – Emergency
2020-10-19
2020-10-12
2020-10-05
2020-09-28
2020-09-21
2020-09-15
2020-09-07
2020-08-24
2020-09-01
2020-07-27
2020-08-03
2020-07-20
2020-07-07 – Emergency
2020-07-13
2020-06-22
2020-06-15
2020-06-08
2020-05-25
2020-05-11
2020-05-04
2020-04-27
2020-04-20
2020-04-06
2020-03-30
2020-03-23
2020-03-12
2020-03-09
2020-03-02 – Emergency
2020-02-17
2020-02-10
2020-01-27
2020-01-20
2020-01-16 – Emergency
2019-12-16
2019-11-25 – Emergency
2019-11-12
2019-11-07 – Emergency
2019-11-04
2019-10-27 – Emergency
2019-10-23 – Emergency
2019-10-21
2019-10-17 – Emergency
2019-10-14
2019-10-07
2019-09-30
2019-09-26 – Emergency
2019-09-16
Historical

Custom Firewall rules

Custom Firewall rules allow you to control incoming traffic by filtering requests. You can perform actions like Block or JS Challenge on incoming requests according to rules you define.

Like other rules evaluated by Cloudflare’s Ruleset Engine , Custom Firewall rules have an expression and an action:

The expression specifies the criteria you are matching traffic on using the Rules language .
The action specifies what to perform when there is a match for the rule.

Getting started

To create Custom Firewall rules using the Cloudflare dashboard, refer to Create Custom Firewall rules in the dashboard .

You can also create Custom Firewall rules using the Rulesets API . Refer to Create Custom Firewall rules via API for more information.

Custom Firewall rules

​​ Getting started

Getting started