Updated Date: 07/07/2026
About Client-Side Defense
F5 Distributed Cloud Client-Side Defense (CSD) provides a multi-phase protection system that protects web applications against Formjacking, Magecart, and other malicious JavaScript attacks. This multi-phase protection system includes detection, alerting, and mitigation.
- Detection: A continuously evolving signal set allows CSD to understand when scripts on web pages start reading PII or exhibit signs of exfiltration.
- Alerting: CSD generates timely alerts on malicious changes in behavior of scripts, provided by a continuously improving Analysis Engine. The Analysis Engine contains a machine learning component for accurate and informative analysis and provides details on the behavior of malicious script to help troubleshoot and identify the root cause.
- Mitigation: CSD detects threats in real-time and provides enforcement with one-click mitigation. CSD leverages the same obfuscation and signal technology as F5® Distributed Cloud Bot Defense, delivering unparalleled efficacy.
Note: Complete CSD configuration starts and ends in the F5 Distributed Cloud (XC) Console. The instructions provided here are for deploying CSD on your web application using the BIG-IP. For comprehensive configuration instructions on deploying and configuring CSD, click here.