Here is a more complete list of providers you can use to learn more about their offerings:  

  

"StackPath's Web Application Firewall can detect DDoS attacks at layers 3, 4, and 7. It uses threshold rules (domain, burst, and sub-second) to identify layer 7 (application) DDoS attacks". Once you have identified it, it does not mess with your resources. Once you have identified it, it doesn't tangle up your resources. Protect your server from being attacked by being prepared for the worst! DDoS attacks are constantly evolving, so before anything hits, have extra capacity ready to keep your server alive.  

The service may take up to 65 Tbps of junk traffic before hitting your server. This uncommon level of capacity should be enough to stop some of the largest DDoS ever recorded.  

"Haltdos is a service that provides DDoS protection to help protect against various forms of internet attacks. They offer three options for malware protection, total system repair, and clone machine activation. " The Haltdos L7 DDoS Protection Service can be described as a service that provides DDoS protection to help protect against various forms of internet attacks.

Haltdos offers three options for malware protection, total system repair, and clone machine activation. Haltdos provides DDoS protection to organizations in many different industries.

Cloudflare DDoS Protection offers protection from DDoS attacks, also known as DOS attacks, for a single website. This service defends against these types of attacks by distributing traffic around a number of geographically dispersed Data Centers. To provide this protection, Cloudflare works with a customer's DNS, Nginx, and Apache servers for a cost of just $6. 25 per month.

Akamai is an internet-based cloud computing and content delivery services company that provides more than just protection against DDoS attacks. Akamai's L7 DDoS Protection service is the next step in DDoS security, or defense against distributed denial of service, or DDOS, attacks.

AppTrana is a new and innovative method of software and service which help enterprises gain an insight into their current operations. 

The primary focus of the service is to secure and secure websites from Distributed Denial of Service (DDoS) attacks by distributing traffic around a large number of servers in multiple geographic locations. 

Arbor Networks provides DDoS attack prevention services to large corporations, small and medium sized enterprises (SMEs), schools, government agencies, universities, hospitals, and others.