https://redmine.pfsense.org/issues/1390
Bug #1390: pfflowd amd64 binary missing - pfSense Packages - pfSense bugtracker
bugpfflowdbinarymissingpfsense
https://www.freshports.org/net/pfflowd/
FreshPorts -- net/pfflowd: Convert pfsync states to NetFlow datagrams
pfflowd converts OpenBSD PF status messages (sent via the pfsync interface) to Cisco NetFlow datagrams. These datagrams may be sent (via UDP) to a host of...
freshportspfflowdconvertpfsyncstates
https://forum.netgate.com/topic/10634/pfflowd-how-to-specify-interface-to-monitor
Pfflowd - How to specify interface to monitor? | Netgate Forum
Aug 31, 2008 - I have been struggling with a solution I am trying to use to do traffic analysis on customer networks without having to make changes to their networks. What...
how topfflowdspecifyinterfacemonitor