ngrok's next-generation firewall system, FWNG, aims to provide a global view of traffic and improve protection against network attacks. The system aggregates telemetry data in the controlplane, analyzes it, and generates traffic policies that are enforced across all regions. This design allows for more efficient tracking of traffic sources and better defense against malicious traffic. ngrok has released the Firewall Toolkit as an open-source library to enable community contributions and improvement.