Fields in match conditions - Website Protection Settings| Alibaba Cloud Documentation Center

Match conditions and actions

In the WAF console, you can customize rules for whitelists and protection policies. A custom rule consists of match conditions and actions. When you create a rule, you must specify the match fields, logical operators, and match content to add match conditions. You also need to select an action that is triggered when requests match the conditions you specify.

Match conditions
Each match condition consists of a match field, logical operator, and match content. The match content does not support regular expressions. You can add a maximum of five match conditions to a custom rule, and the logical relation among the conditions is AND. The custom rule works only when all the match conditions are met.
Action
When you configure a whitelist rule, you must select features for Modules Bypassing Check so that requests that meet match conditions bypass the corresponding checks. When you configure custom protection policies, you must select an action that is triggered for requests that meet match conditions. For more information, see the following topics:

Supported match fields

The following table lists the match fields that are supported in match conditions.


Match field	Edition	Logical operator	Description
IP	Pro edition or higher	Has and Does not have	The source IP address of an access request. You can enter IP addresses or CIDR blocks, for example, 1.1.1.1/24. Note You can enter a maximum of 50 IP addresses or CIDR blocks. Separate them with commas (,).
URL	Pro edition or higher	Includes and Does not include Equals and Does not equal URI Path Match Regular Expression	The URL of an access request.
Referer	Pro edition or higher	Includes and Does not include Equals and Does not equal Length equals, Length more than, and Length less than Does not exist	The URL of the source page from which the access request is redirected.
User-Agent	Pro edition or higher	Includes and Does not include Equals and Does not equal Length equals, Length more than, and Length less than	The browser information of the client that initiates access requests. The information includes the browser, rendering engine, and version.
Params	Pro edition or higher	Includes and Does not include Equals and Does not equal Length equals, Length more than, and Length less than	The parameter part in the request URL, usually the part that follows the question mark (?) in the URL. For example, in `www.abc.com/index.html? action=login`, `action=login` is the parameter part.
Cookie	Business edition or higher	Includes and Does not include Equals and Does not equal Length equals, Length more than, and Length less than Does not exist	The cookie information in an access request.
Content-Type	Business edition or higher	Includes and Does not include Equals and Does not equal Length equals, Length more than, and Length less than	The HTTP content type (MIME) in the response.
Content-Length	Business edition or higher	Value less than, Value equals, and Value more than	The number of bytes in the response.
X-Forwarded-For	Business edition or higher	Includes and Does not include Equals and Does not equal Length equals, Length more than, and Length less than Does not exist	The actual IP address of the client that initiates access requests. X-Forwarded-For (XFF) is an HTTP header field. It is used to identify the originating IP address of a client that connects to the server through an HTTP proxy or a Server Load Balancer (SLB) instance. XFF is only included in the access requests that are forwarded by the HTTP proxy or SLB instance.
Post-Body	Business edition or higher	Includes and Does not include Equals and Does not equal	The content of an access request.
Http-Method	Business edition or higher	Equals and Does not equal	The request method, such as GET, POST, DELETE, PUT, and OPTIONS.
Header	Business edition or higher	Includes and Does not include Equals and Does not equal Length equals, Length more than, and Length less than Does not exist	The header of an access request, which is used to customize the HTTP header.
URLPath	Business edition or higher	Includes and Does not include Equals and Does not equal URI Path Match Regular Expression	The URL path of an access request.

Logical operators


Logical operator	Description
Has and Does not have	Whether the match field has the match content.
Includes and Does not include	Whether the match field includes the match content.
Equals and Does not equal	Whether the match field equals the match content.
Length equals, Length more than, and Length less than	The length of the match field is equal to, greater than, or less than that of the match content.
Does not exist	The match field does not exist.
Value less than, Value equals, and Value more than	The value of the match field is less than, equal to, or greater than that of the match content.
URI Path Match	The prefix of the match field contains the match content.
Regular Expression	The match field matches the regular expression defined in the match content.