AWS WAF Service Level Agreement

Last Updated: March 6, 2019

This AWS WAF Service Level Agreement (“SLA”) is a policy governing the use of AWS WAF and applies separately to each account using AWS WAF. In the event of a conflict between the terms of this SLA and the terms of the AWS Customer Agreement or other agreement with us governing your use of our Services (the “Agreement”), the terms and conditions of this SLA apply, but only to the extent of such conflict. Capitalized terms used herein but not defined herein shall have the meanings set forth in the Agreement.

Service Commitment

AWS will use commercially reasonable efforts to make AWS WAF available with a Monthly Uptime Percentage for each AWS region, during any monthly billing cycle, of at least 99.95% (the “Service Commitment”). In the event AWS WAF does not meet the Service Commitment, you will be eligible to receive a Service Credit as described below.

Service Credits

Service Credits are calculated as a percentage of the following charges paid by you for AWS WAF for the monthly billing cycle in which the Monthly Uptime Percentage for a given AWS region fell within the ranges set forth in the table below:

Monthly Uptime Percentage

Service Credit Percentage

Less than 99.95% but greater than or equal to 99.0%

10%

Less than 99.0% but greater than or equal to 95.0%

25%

Less than 95.0% 100%

We will apply any Service Credits only against future AWS WAF payments otherwise due from you. At our discretion, we may issue the Service Credits to the credit card you used to pay for the billing cycle in which the unavailability occurred. Service Credits will not entitle you to any refund or other payment from AWS. Service Credits will be applicable and issued only if the credit amount for the applicable monthly billing cycle is greater than one dollar ($1 USD). Service Credits may not be transferred or applied to any other account. Unless otherwise provided in the Agreement, your sole and exclusive remedy for any unavailability or non-performance or other failure by us to provide AWS WAF is the receipt of Service Credits (if eligible) in accordance with the terms of this SLA.

Credit Request and Payment Procedures

To receive a Service Credit, you must submit a claim by opening a case in the AWS Support Center. To be eligible, the credit request must be received by us by the end of the second billing cycle after which the incident occurred and must include:

(i) the words “SLA Credit Request” in the subject line;

(ii)  the billing cycle and AWS regions with respect to which you are claiming Service Credits, together with the Monthly Uptime Percentage for that AWS region for the billing cycle and the specific dates, times, and Availabilities for each 5-minute interval with less than 100% Availability in that AWS region throughout the billing cycle;

(iii) your Request logs that document the errors for your claimed outage (any confidential or sensitive information in these logs should be removed or replaced with asterisks).

If the Monthly Uptime Percentage of such credit request is confirmed by us and is less than the Service Commitment, then we will issue the Service Credits to you within one billing cycle following the month in which the credit request occurred. Your failure to provide the credit request and other information as required above will disqualify you from receiving Service Credits.

AWS WAF SLA Exclusions

The Service Commitment does not apply to any unavailability, suspension or termination of AWS WAF, or any other AWS WAF performance issues: (i) caused by factors outside of our reasonable control, including any force majeure event or Internet access or related problems beyond the demarcation point of AWS WAF; (ii) that result from any voluntary actions or inactions from you or any third party; (iii) that result from you not following the best practices described in the AWS WAF User Guide on the AWS Site; (iv) that result from your equipment, software or other technology and/or third party equipment, software or other technology (other than third party equipment within our direct control); or (v) arising from our suspension or termination of your right to use AWS WAF in accordance with the Agreement (collectively, the “AWS WAF SLA Exclusions”). If availability is impacted by factors other than those explicitly used in our Monthly Uptime Percentage calculation, then we may issue a Service Credit considering such factors at our discretion.

Definitions

  • “Availability” is calculated for each 5-minute interval as the percentage of Requests inspected by AWS WAF that do not fail with Errors and relate solely to AWS WAF Requests that are associated with underlying Host Services. If your respective Host Services did not make any Requests for inspection by AWS WAF in a given 5-minute interval, that interval is assumed to be 100% available.
  • An “Error” is any Request that AWS WAF failed to inspect, reported by underlying Host Services in their respective access logs.
  • “Host Services” are Amazon CloudFront, AWS Application Load Balancer, and Amazon API Gateway.
  • “Monthly Uptime Percentage” for a given AWS region is calculated as the average of the Availability for all 5-minute intervals in a monthly billing cycle. Monthly Uptime Percentage measurements exclude downtime resulting directly or indirectly from any AWS WAF SLA Exclusions.
  • “Request” means an inbound HTTP request.
  • A “Service Credit” is a dollar credit, calculated as set forth below, that we may credit back to an eligible account. 

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