AWS SDK Version 3 for .NET
API Reference

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Creates a RateBasedRule. The RateBasedRule contains a RateLimit, which specifies the maximum number of requests that AWS WAF allows from a specified IP address in a five-minute period. The RateBasedRule also contains the IPSet objects, ByteMatchSet objects, and other predicates that identify the requests that you want to count or block if these requests exceed the RateLimit.

If you add more than one predicate to a RateBasedRule, a request not only must exceed the RateLimit, but it also must match all the specifications to be counted or blocked. For example, suppose you add the following to a RateBasedRule:

Further, you specify a RateLimit of 15,000.

You then add the RateBasedRule to a WebACL and specify that you want to block requests that meet the conditions in the rule. For a request to be blocked, it must come from the IP address 192.0.2.44 and the User-Agent header in the request must contain the value BadBot. Further, requests that match these two conditions must be received at a rate of more than 15,000 requests every five minutes. If both conditions are met and the rate is exceeded, AWS WAF blocks the requests. If the rate drops below 15,000 for a five-minute period, AWS WAF no longer blocks the requests.

As a second example, suppose you want to limit requests to a particular page on your site. To do this, you could add the following to a RateBasedRule:

Further, you specify a RateLimit of 15,000.

By adding this RateBasedRule to a WebACL, you could limit requests to your login page without affecting the rest of your site.

To create and configure a RateBasedRule, perform the following steps:

  1. Create and update the predicates that you want to include in the rule. For more information, see CreateByteMatchSet, CreateIPSet, and CreateSqlInjectionMatchSet.

  2. Use GetChangeToken to get the change token that you provide in the ChangeToken parameter of a CreateRule request.

  3. Submit a CreateRateBasedRule request.

  4. Use GetChangeToken to get the change token that you provide in the ChangeToken parameter of an UpdateRule request.

  5. Submit an UpdateRateBasedRule request to specify the predicates that you want to include in the rule.

  6. Create and update a WebACL that contains the RateBasedRule. For more information, see CreateWebACL.

For more information about how to use the AWS WAF API to allow or block HTTP requests, see the AWS WAF Developer Guide.

Note:

For PCL this operation is only available in asynchronous form. Please refer to CreateRateBasedRuleAsync.

Namespace: Amazon.WAFRegional
Assembly: AWSSDK.WAFRegional.dll
Version: 3.x.y.z

Syntax

C#
public abstract CreateRateBasedRuleResponse CreateRateBasedRule(
         CreateRateBasedRuleRequest request
)
Parameters
request
Type: Amazon.WAFRegional.Model.CreateRateBasedRuleRequest

Container for the necessary parameters to execute the CreateRateBasedRule service method.

Return Value
The response from the CreateRateBasedRule service method, as returned by WAFRegional.

Exceptions

ExceptionCondition
WAFDisallowedNameException The name specified is invalid.
WAFInternalErrorException The operation failed because of a system problem, even though the request was valid. Retry your request.
WAFInvalidParameterException The operation failed because AWS WAF didn't recognize a parameter in the request. For example: You specified an invalid parameter name. You specified an invalid value. You tried to update an object (ByteMatchSet, IPSet, Rule, or WebACL) using an action other than INSERT or DELETE. You tried to create a WebACL with a DefaultActionType other than ALLOW, BLOCK, or COUNT. You tried to create a RateBasedRule with a RateKey value other than IP. You tried to update a WebACL with a WafActionType other than ALLOW, BLOCK, or COUNT. You tried to update a ByteMatchSet with a FieldToMatchType other than HEADER, QUERY_STRING, or URI. You tried to update a ByteMatchSet with a Field of HEADER but no value for Data. Your request references an ARN that is malformed, or corresponds to a resource with which a web ACL cannot be associated.
WAFLimitsExceededException The operation exceeds a resource limit, for example, the maximum number of WebACL objects that you can create for an AWS account. For more information, see Limits in the AWS WAF Developer Guide.
WAFStaleDataException The operation failed because you tried to create, update, or delete an object by using a change token that has already been used.

Version Information

.NET Framework:
Supported in: 4.5, 4.0, 3.5

Portable Class Library:
Supported in: Windows Store Apps
Supported in: Windows Phone 8.1
Supported in: Xamarin Android
Supported in: Xamarin iOS (Unified)
Supported in: Xamarin.Forms

See Also