Solved Looking for a guide to netflow on FreeBSD13

In the past, for example FreeBSD10 I have it working, nfcapd..nfdump..etc and works like a charm
but in FreeBSD13 dont work, even dont create the listener port
the same code I ever use is this(is a file that I call with ngctl -f [filename])

Code:
mkpeer em0: netflow lower iface0
    name em0:lower netflow
    connect em0: netflow: upper out0
    mkpeer netflow: ksocket export9 inet/dgram/udp
    name netflow:export9 exporter
    msg netflow: setconfig {iface=0 conf=7}
    msg netflow:export9 connect inet/127.0.0.1:4444

em0 is the external interface of the firewall , and em1 is the internal
my goal is to capture traffic from em1 , but like I said, and even dont create the listen port for nfdump
any ideas?
 
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