Defense is the best offense.

DDoS attacks are an IT nightmare. By combining high-volume traffic clogging with application-targeted techniques, these stealthy attacks disrupt service for legitimate users, or take down entire networks.

Silverline DDoS Protection detects and mitigates large-scale, SSL, or application-targeted attacks in real time—defending your business from even the largest attacks, over hundreds of gigabits per second.


L3 to L7 real-time cloud scrubbing

Under Attack?

We can help.

Call (866) 329-4253

or +1 (206) 272-7969

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Protect against all attack vectors.

This service provides L3–L7 protection with cloud-scrubbing technologies to detect, identify, and mitigate threats in real time, returning clean traffic back to your site.

It’s also deployed and managed by experts from F5’s Security Operations Center (SOC), so you have access to security experts, 24x7.

F5 Silverline DDoS Protection

Mind over what matters.

The customer portal gives clear attack visibility and reporting

Use the F5 customer portal to inspect attack mitigation design, configure and provision deployment preferences, and view attack events and communications.


Unparalleled visibility and reporting before, during, and after a DDoS attack.

Silverline DDoS Protection includes access to the F5 customer portal, which provides everything you need to manage services, configure proxy and routing, and gain crucial reporting and visibility into DDoS events. The portal provides details about an attack as it occurs, including the type and size of the attack, IP origin, attack vectors, mitigation process, and all actions taken by the Security Operations Center during mitigation. 

Choose from two service options.


Primary protection as the first line of defense

The Always On subscription stops bad traffic from reaching your network by continuously processing all traffic through the Silverline cloud-scrubbing services and returning only legitimate traffic to your site.


Primary protection available on demand

The Always Available subscription is pre-configured for your systems, runs on standby, and can be initiated when under attack.

F5’s Security Operations Center employs in-house security experts

What’s unique about F5’s Security Operations Center?

You're talking to one of our own.

The security support we provide isn’t outsourced to a third party. We hire those hard-to-find, specialized security experts and they’re using F5 products combined with state-of-the-art security tools to ensure the best protection possible.

Add on Silverline Threat Intelligence.

With a frequently updated list of threat sources and high-risk IP addresses, Silverline Threat Intelligence delivers context and analysis to identify and block malicious communications from multiple sources. This managed service is only available as an add-on to either Silverline DDoS Protection or the Silverline Web Application Firewall.
Learn about Silverline Threat Intelligence >

What exactly does Silverline Threat Intelligence protect against?

See more threat sources and read about how Silverline Threat Intelligence can help.

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Blocks IP addresses hosting phishing sites and other fraudulent activity, such as click fraud or gaming fraud.


Detects and blocks IP addresses used in distributed denial-of-service (DDoS) attacks.


Denies botnet command and control channels, as well as infected zombie machines controlled by botmasters.


Mitigates IP addresses that provide proxy and anonymization services and The Onion Router (TOR) anonymizer addresses.


Provides reconnaissance that identifies probes, host scans, domain scans, and password brute force.