# Shield

* Standard
  * Free service that protects all AWS customers on ELB, CloudFront or Route53.
  * Protects against SYN/UDP floods, reflection attacks, and other Layer 3 / Layer 4 attacks.
* Advanced
  * Shield Advanced provides enhanced protection for your application running behind ELB, CloudFront or Route53 against larger and more sophisticated attacks. $3000 / month.
  * Always-on, flow-based monitoring of network traffic and active application monitoring to provide near real-time notifications of DDoS attacks.
  * DDoS Response Team (DRT) to manage and mitigate DDoS attacks.
  * Protects your AWS bill against higher fees due to ELB, CloudFront and Route53 usage spikes during DDoS.