AWS::WAFv2::RuleGroup FieldToMatch

The part of the web request that you want AWS WAF to inspect. Include the single FieldToMatch type that you want to inspect, with additional specifications as needed, according to the type. You specify a single request component in FieldToMatch for each rule statement that requires it. To inspect more than one component of the web request, create a separate rule statement for each component.

Example JSON for a QueryString field to match:

"FieldToMatch": { "QueryString": {} }

Example JSON for a Method field to match specification:

"FieldToMatch": { "Method": { "Name": "DELETE" } }

Syntax

To declare this entity in your AWS CloudFormation template, use the following syntax:

JSON

{
  "AllQueryArguments" : Json,
  "Body" : Body,
  "Cookies" : Cookies,
  "Headers" : Headers,
  "JsonBody" : JsonBody,
  "Method" : Json,
  "QueryString" : Json,
  "SingleHeader" : SingleHeader,
  "SingleQueryArgument" : SingleQueryArgument,
  "UriPath" : Json
}

YAML

  AllQueryArguments: Json
  Body: 
    Body
  Cookies: 
    Cookies
  Headers: 
    Headers
  JsonBody: 
    JsonBody
  Method: Json
  QueryString: Json
  SingleHeader: 
    SingleHeader
  SingleQueryArgument: 
    SingleQueryArgument
  UriPath: Json

Properties

AllQueryArguments

Inspect all query arguments.

Required: No

Type: Json

Update requires: No interruption

Body

Inspect the request body as plain text. The request body immediately follows the request headers. This is the part of a request that contains any additional data that you want to send to your web server as the HTTP request body, such as data from a form.

A limited amount of the request body is forwarded to AWS WAF for inspection by the underlying host service. For regional resources, the limit is 8 KB (8,192 bytes) and for CloudFront distributions, the limit is 16 KB (16,384 bytes). For CloudFront distributions, you can increase the limit in the web ACL's AssociationConfig, for additional processing fees.

For information about how to handle oversized request bodies, see the Body object configuration.

Required: No

Type: Body

Update requires: No interruption

Cookies

Inspect the request cookies. You must configure scope and pattern matching filters in the Cookies object, to define the set of cookies and the parts of the cookies that AWS WAF inspects.

Only the first 8 KB (8192 bytes) of a request's cookies and only the first 200 cookies are forwarded to AWS WAF for inspection by the underlying host service. You must configure how to handle any oversize cookie content in the Cookies object. AWS WAF applies the pattern matching filters to the cookies that it receives from the underlying host service.

Required: No

Type: Cookies

Update requires: No interruption

Headers

Inspect the request headers. You must configure scope and pattern matching filters in the Headers object, to define the set of headers to and the parts of the headers that AWS WAF inspects.

Only the first 8 KB (8192 bytes) of a request's headers and only the first 200 headers are forwarded to AWS WAF for inspection by the underlying host service. You must configure how to handle any oversize header content in the Headers object. AWS WAF applies the pattern matching filters to the headers that it receives from the underlying host service.

Required: No

Type: Headers

Update requires: No interruption

JsonBody

Inspect the request body as JSON. The request body immediately follows the request headers. This is the part of a request that contains any additional data that you want to send to your web server as the HTTP request body, such as data from a form.

A limited amount of the request body is forwarded to AWS WAF for inspection by the underlying host service. For regional resources, the limit is 8 KB (8,192 bytes) and for CloudFront distributions, the limit is 16 KB (16,384 bytes). For CloudFront distributions, you can increase the limit in the web ACL's AssociationConfig, for additional processing fees.

For information about how to handle oversized request bodies, see the JsonBody object configuration.

Required: No

Type: JsonBody

Update requires: No interruption

Method

Inspect the HTTP method. The method indicates the type of operation that the request is asking the origin to perform.

Required: No

Type: Json

Update requires: No interruption

QueryString

Inspect the query string. This is the part of a URL that appears after a ? character, if any.

Required: No

Type: Json

Update requires: No interruption

SingleHeader

Inspect a single header. Provide the name of the header to inspect, for example, User-Agent or Referer. This setting isn't case sensitive.

Example JSON: "SingleHeader": { "Name": "haystack" }

Alternately, you can filter and inspect all headers with the Headers FieldToMatch setting.

Required: No

Type: SingleHeader

Update requires: No interruption

SingleQueryArgument

Inspect a single query argument. Provide the name of the query argument to inspect, such as UserName or SalesRegion. The name can be up to 30 characters long and isn't case sensitive.

Example JSON: "SingleQueryArgument": { "Name": "myArgument" }

Required: No

Type: SingleQueryArgument

Update requires: No interruption

UriPath

Inspect the request URI path. This is the part of the web request that identifies a resource, for example, /images/daily-ad.jpg.

Required: No

Type: Json

Update requires: No interruption

Examples

Set the field to match to QueryString

The following shows an example field to match specification for a setting that doesn't requires additional configuration.

YAML

FieldToMatch:
  QueryString: {} 

JSON

"FieldToMatch": 
    { 
         "QueryString": {} 
    } 

Set the field to match to Method

The following shows an example field to match specification for a setting that has additional configuration requirements.

YAML

FieldToMatch:
  Method:
     Name: DELETE 

JSON

"FieldToMatch": 
{ 
    "Method": 
    { 
         "Name": "DELETE" 
    } 
}