![]() They contain information about the traffic ingressing/egressing your firewall such as: Netflow packets are exported by the Firewall to a Netflow Server. when a traffic flow/session is created in the firewall)įlow update - sent periodically to Netflow server every X minutes as more and more packets ingress and egress the firewall for that traffic flowįlow deleted - sent to Netflow server whenever an existing traffic flow closes (FIN, RST), times out/expires, or is deleted/cleared on the firewallįlow denied - sent to Netflow server whenever a traffic flow gets denied by firewall policy There are four main types of Netflow events/records sent from the firewall to a Netflow server:įlow created - sent to Netflow server whenever a new traffic flow comes into the firewall (i.e. If you have configured Netflow on your firewall, whenever traffic flows through any data interface on the firewall with a Netflow Profile configured, the firewall will create a Netflow record and send that information to your Netflow server Verify Netflow packets are arriving to the Netflow Server using a packet capture on the Netflow Server Verify Netflow packets are leaving the firewall using a packet capture on the Firewallġ1. Check firewall system resources such as CPU, memory, buffers, etc.ġ0. Verify firewall is not exceeding Max Logging Rate count/secĩ. Verify counters for Netflow-related global counters are incrementingĨ. Verify counters for Netflow statistics are incrementingħ. Check reachability to your Netflow ServerĦ. Verify Netflow configuration via Firewall CLIĥ. Verify Netflow configuration via Firewall Web UIĤ. Netflow Server (w/ Netflow Analysis/Collector software installed):ģ.This document will show you how to verify and troubleshoot Netflow on the Palo Alto Networks Firewall
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