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Product Overview
Next-Gen WAF (Web Application Firewall) is an agent-based web application firewall that integrates with most popular web services, such as Apache and nginx, and tags web requests based on their content. When an IP address meets a defined threshold of accumulated malicious tagged events, the product flags the offending IP address. If the Agent mode is set to "Blocking," it logs the requests and also blocks them from reaching your web servers.
Detection Strategy for Network Integrations
Detection
Network traffic monitoring is a critical element of our detection strategy, offering insight into the activity of data as it moves across an organization's systems. The network traffic data source focuses on network connection creation (the initial construction of a network connection such as socket information, and src and dst IP and Ports ), network traffic content (logged network traffic data showing both protocol header and body values like PCAP), and network traffic flow (summarized network packet data, with metrics, such as protocol headers and volume like netflow or http logs).
We pull this information into our detection pipeline as events in the form of both security alerts and raw telemetry (depending on the integration). When a threat is detected, our automated response bot, Ruxie, takes action by enriching evidence fields with first- and third-party threat intelligence. Additional Ruxie actions query a wide span of technologies directly to arm analysts with key pieces of investigative information and related events.
Response
Network technologies are utilized for support across many types of Expel Alerts such as endpoint and cloud. The main focus of the response strategy is on source IP, destination IP, and domain tracking to identify related connections, along with user activity summaries to give extra alert context.
To learn more about our overall approach to detection strategy, see About Detection Strategy in the Help Center.
What We Support for Fastly Next-Gen WAF
To see a comprehensive list of the most up-to-date Expel detection rules, vendor detection rules, opt-in detections, and available DUETs that we support for Fastly Next-Gen WAF, you can visit the Detections page in Workbench or ask your Sales or Support rep for the most recent download.
| Fastly Next-Gen WAF detection rules support | No. |
| Detection rules written by Expel | No. |
| Investigative support through Workbench | Yes. We are able to take the following investigative actions to gather data for triage and investigation of events.
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| Hunting support | No. Hunting is not currently available for this integration. |
Additional Details and Common Questions
A vendor alert does not typically include all of the contextual timeline activity surrounding the event of interest. Because this integration does not allow us to get all necessary data via the API, we will ask you for a certain level of console access during onboarding.
The level of access that we require is meant to support essential triage and research activities, and to help us determine the vector and extent of attacker activity for an identified threat. At minimum, we will ask for visibility into alert data, timeline events recorded, and live response/real time response shell (if applicable).
DUET
A DUET rule flags certain events as needing an immediate verification or notification, and bypasses the normal internal event triage process. The events subject to DUET rules contain behaviors that are not typically indicative of true security incidents, as they are related to policy violations or potential risk.
There are a number of workflows that a DUET may follow. When enabled, the activity will be flagged for investigation and will be routed to you (rather than to us) to take a specified first action. To see the specific DUET rules currently supported for this integration, visit the Detections page in Workbench.