AWS Shield Guide: DDoS Protection, Standard vs Advanced, Pricing and Features

What Is AWS Shield

AWS Shield is Amazon's managed DDoS protection service, built to detect and mitigate distributed denial of service attacks against resources running on AWS. It works at the network and transport layer by default, and can extend into application layer protection depending on which tier you use.

Every single AWS account automatically gets AWS Shield Standard at no cost. There is no signup step and nothing to configure. Think of it as a baseline security guard that is always on duty, watching for the most common attack patterns and blocking them before they ever reach your application.

How AWS DDoS Protection Actually Works

Shield sits in front of resources like Elastic Load Balancers, CloudFront distributions, Route 53 hosted zones, Global Accelerator endpoints, and EC2 instances with Elastic IPs. When it detects abnormal traffic patterns consistent with a DDoS attack, such as a SYN flood or a reflection attack, it applies automatic mitigations without requiring any manual intervention on your part.

The protection is inline, meaning it does not add extra hops or noticeable latency to legitimate traffic. For most small to mid sized applications, this automatic layer handles the vast majority of attack attempts without anyone on your team even noticing.

AWS Shield Standard vs Advanced

This is the question almost everyone searching for AWS Shield actually wants answered. Here is the practical difference.

AWS Shield Standard

Shield Standard covers the most common and frequent attacks automatically, and AWS has stated it addresses the large majority of attacks seen across its network. For a personal project, a low traffic website, or an internal tool with no public facing SLA, Standard alone is often genuinely sufficient.

AWS Shield Advanced

Shield Advanced is built for internet facing applications where downtime is expensive, whether that is lost revenue, a broken SLA, or reputational damage. Subscribing gives you a few things Standard does not offer at all.

• Enhanced detection, including application layer monitoring tuned to your specific traffic patterns rather than generic thresholds

• 24/7 access to the DDoS Response Team, a group of AWS security engineers who specialize in DDoS mitigation, though reaching them requires a Business or Enterprise Support plan

• DDoS cost protection, which credits back usage charges on resources like CloudFront or ELB that scale up specifically because of an attack

• AWS WAF included, so you get application layer filtering rules bundled into the subscription instead of paying separately

AWS Shield Pricing

Shield Advanced pricing is one of the more misunderstood parts of this service, so let's break it down clearly.

The base subscription is a flat $3,000 per month, billed under a mandatory one year commitment. This fee is charged once per payer account, so if you are running AWS Organizations with multiple linked accounts, you generally are not paying $3,000 per account, just once at the organization level as long as everything sits under the same consolidated billing family.

On top of the subscription, you pay a usage fee based on data transfer out from the specific resources you have protected, including CloudFront, ELB, EC2, and Global Accelerator. As an example, an Application Load Balancer with 1,000 GB of regional data transfer out per month at a typical rate of $0.05 per GB would add roughly $50 to your bill, bringing a simple single resource setup to around $3,050 total for the month.

A few pricing details worth knowing before you commit:

1. The subscription includes up to 50 billion WAF requests per month across Shield protected resources under your payer ID, at no additional WAF charge.

2. Requests that Shield Advanced identifies as part of a DDoS event do not count against that 50 billion request limit.

3. You still pay standard fees for the underlying resources themselves, such as ELB or CloudFront charges, separate from the Shield subscription.

4. Reaching the DDoS Response Team specifically, beyond the automatic protections, requires an active Business or Enterprise AWS Support plan on top of Shield Advanced.

AWS Shield vs Shield Advanced: Which One Do You Actually Need

For most engineers, the deciding factor is not technical capability, it is business risk. Ask yourself these questions before subscribing to Advanced.

• Would an hour of downtime cost your business more than $3,000 in lost revenue or SLA penalties?

• Are you running in a regulated industry, such as finance or healthcare, where availability guarantees are part of a compliance requirement?

• Have you already experienced a DDoS attack, or does your traffic profile make you a likely target, such as gaming, media, or e-commerce during high traffic events?

• Do you need application layer protection against sophisticated Layer 7 attacks, not just volumetric floods?

If you answered yes to two or more of these, Shield Advanced is worth evaluating seriously. If your workload is internal, low traffic, or not business critical, Shield Standard combined with a properly configured AWS WAF is often a more cost effective starting point.

Setting Up AWS Shield Advanced

Enabling Shield Advanced is straightforward once you have decided it is the right fit.

1. Subscribe to Shield Advanced through the AWS console under the WAF and Shield service.

2. Confirm you are on a Business or Enterprise Support plan if you want DDoS Response Team access.

3. Add protection to specific resources, such as your CloudFront distributions, ELB, or Elastic IPs.

4. Configure health based detection tied to Route 53 health checks so Shield can correlate unhealthy endpoints with active attacks.

5. Enable proactive engagement so the Response Team can contact your team directly when a health check fails during a suspected event.

6. Review AWS WAF rules included with your subscription and tune them to your application's normal traffic.

Conclusion

AWS Shield gives every AWS customer a solid baseline of DDoS protection for free, and for many low risk workloads, that baseline is genuinely enough. Shield Advanced exists for a different category of problem entirely, where downtime carries real financial or contractual consequences and you need application layer protection, cost protection, and direct access to AWS security experts. At $3,000 per month plus data transfer usage fees, it is not a casual purchase, so weigh it against your actual business risk rather than subscribing out of general caution. If you are still unsure which tier fits, start by reviewing your traffic patterns and your application's tolerance for downtime before making the call.