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AWS CloudFormation
User Guide (API Version 2010-05-15)

AWS Documentation » AWS CloudFormation » User Guide » Template Reference » AWS Resource and Property Types Reference » AWS WAF Resource Types Reference » AWS::WAF::SizeConstraintSet » AWS WAF SizeConstraintSet SizeConstraint

AWS WAF SizeConstraintSet SizeConstraint

SizeConstraint is a property of the AWS::WAF::SizeConstraintSet resource that specifies a size constraint and which part of a web request that you want AWS WAF to constrain.

Syntax

JSON

{
  "ComparisonOperator" : String,
  "FieldToMatch" : Field to match,
  "Size" : String,
  "TextTransformation" : String
}

YAML

ComparisonOperator: String
FieldToMatch:
  Field to match
Size: String
TextTransformation: String

Properties

ComparisonOperator

The type of comparison that you want AWS WAF to perform. AWS WAF uses this value in combination with the Size and FieldToMatch property values to check if the size constraint is a match. For more information and valid values, see the ComparisonOperator content for the SizeConstraint data type in the AWS WAF API Reference.

Required: Yes

Type: String

FieldToMatch

The part of a web request that you want AWS WAF to search, such as a specific header or a query string.

Required: Yes

Type: AWS WAF SizeConstraintSet SizeConstraint FieldToMatch

Size

The size in bytes that you want AWS WAF to compare against the size of the specified FieldToMatch. AWS WAF uses Size in combination with the ComparisonOperator and FieldToMatch property values to check if the size constraint of a web request is a match. For more information and valid values, see the Size content for the SizeConstraint data type in the AWS WAF API Reference.

Required: Yes

Type: Integer

TextTransformation

Specifies how AWS WAF processes the FieldToMatch property before inspecting a request for a match. Text transformations eliminate some of the unusual formatting that attackers use in web requests in an effort to bypass AWS WAF. If you specify a transformation, AWS WAF transforms the FieldToMatch before inspecting a web request for a match.

For example, AWS WAF can replace white space characters (such as \t and \n) with a single space. For valid values, see the TextTransformation content for the SizeConstraint data type in the AWS WAF API Reference.

Required: Yes

Type: String

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