AWS::WAFv2::WebACL IPSetForwardedIPConfiguration

The configuration for inspecting IP addresses in an HTTP header that you specify, instead of using the IP address that's reported by the web request origin. Commonly, this is the X-Forwarded-For (XFF) header, but you can specify any header name.

Note

If the specified header isn't present in the request, AWS WAF doesn't apply the rule to the web request at all.

This configuration is used only for IPSetReferenceStatement. For GeoMatchStatement and RateBasedStatement, use ForwardedIPConfig instead.

Syntax

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

JSON

{
  "FallbackBehavior" : String,
  "HeaderName" : String,
  "Position" : String
}

YAML

  FallbackBehavior: String
  HeaderName: String
  Position: String

Properties

FallbackBehavior

The match status to assign to the web request if the request doesn't have a valid IP address in the specified position.

Note

If the specified header isn't present in the request, AWS WAF doesn't apply the rule to the web request at all.

You can specify the following fallback behaviors:

• MATCH - Treat the web request as matching the rule statement. AWS WAF applies the rule action to the request.

• NO_MATCH - Treat the web request as not matching the rule statement.

Required: Yes

Type: String

Allowed values: MATCH | NO_MATCH

Update requires: No interruption

HeaderName

The name of the HTTP header to use for the IP address. For example, to use the X-Forwarded-For (XFF) header, set this to X-Forwarded-For.

Note

If the specified header isn't present in the request, AWS WAF doesn't apply the rule to the web request at all.

Required: Yes

Type: String

Pattern: ^[a-zA-Z0-9-]+{1,255}$

Update requires: No interruption

Position

The position in the header to search for the IP address. The header can contain IP addresses of the original client and also of proxies. For example, the header value could be 10.1.1.1, 127.0.0.0, 10.10.10.10 where the first IP address identifies the original client and the rest identify proxies that the request went through.

The options for this setting are the following:

• FIRST - Inspect the first IP address in the list of IP addresses in the header. This is usually the client's original IP.

• LAST - Inspect the last IP address in the list of IP addresses in the header.

• ANY - Inspect all IP addresses in the header for a match. If the header contains more than 10 IP addresses, AWS WAF inspects the last 10.

Required: Yes

Type: String

Allowed values: FIRST | LAST | ANY

Update requires: No interruption