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Automatic Mitigation for Sophisticated DDoS Attacks

Powerful, always-on DDoS protection that quickly defeats attacks without impacting site performance or visitors.

The Clear Choice in DDos Protection


With nearly 30 data centers around the world, SiteLock quickly detects harmful websites visitor requests to counter DDoS attacks.


Our DDoS mitigation has a less than 1% false positive rate, which means more than 99% of your authentic website traffic will be unaffected.


Legitimate visitors will not encounter latency, CAPTCHAs or annoying wait screens if your website comes under attack.

How a DDoS Attack Impacts Your Website

DDoS, short for "Distributed Denial of Service", is a form of attack where multiple compromised networks are used to target a single website. When a website is under attack, your legitimate users can’t access your website because a hacker-controlled "fleet" of computers are maliciously flooding traffic to your website. DDoS attacks have grown to be the weapon of choice for hackers and cyber criminals as they are inexpensive to execute, difficult to stop, and impact a very large network of users.

12M+ Websites Protected

Tennis Channel logo New-Orleans logo Frontier logo El Poll Loco logo

Select the Leader in DDoS Protection

Most Powerful DDoS Protection

With over 5 Terabits per second of on-demand scrubbing capacity and the ability to process 30 billion attack packets per second you can rest assured that your website is protected by the most powerful DDoS solution.

"Always On" & "On-Demand" DDoS Protection

SiteLock offers its DDoS clients a choice of automatic "always on" DDoS mitigation vs. "on demand". Using the "always on" solution, our technology is fully equipped to handle what are known as "hit & run" DDoS attacks, which are comprised of very short bursts of traffic at interval levels over a long period of time. Automatic detection and activation enables SiteLock to take full responsibility for both detection and mitigation of the attack.

Multi-Layer DDoS Prevention

Malicious packets are instantaneously recognized and cleaned out by SiteLock ISP-grade edge routers. Every SiteLock data center holds numerous interconnected, high-powered scrubbing clusters that are used for real-time DDoS traffic reporting and blocking. When facing a DDoS attack, these clusters use intelligent traffic profiling solutions and bot detection technology to accurately eliminate dangerous traffic.

The SiteLock Difference

In order to become the global leader in website security, you have to do things differently. Powered by a mission to protect every website on the internet, our customers benefit from industry-leading technology, 24/7 U.S.-based support, reliable performance, and a world-class customer experience to back it up.



SiteLock proxies all web requests to block DDoS attacks from being relayed to client origin servers. SiteLock detects and mitigates any type of attack, including:

  • TCP Fragment
  • UDP
  • Slowloris
  • Spoofing
  • ICMP
  • IGMP
  • HTTP Flood
  • Brute Force
  • Connection Flood
  • DNS Flood
  • NXDomain
  • Mixed SYN + UDP or ICMP + UDP Flood
  • Ping of Death
  • Smurf
  • Reflected ICMP & UDP
  • As well as other attacks

Need More Information

Contact us today to get a free evaluation of your DDoS needs and learn how SiteLock can work for You.