$OpenBSD: README,v 1.2 2018/09/04 12:46:17 espie Exp $
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| Running ${PKGSTEM} on OpenBSD
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NetFlow input from pf
---------------------
By default FastNetMon listens on port 2055 for incoming NetFlow data. This can
be obtained from pflow(4). Minimal pf.conf addition to export all states through
pflow(4):
set state-defaults pflow
And create a pflow0 with:
# ifconfig pflow0 flowsrc 127.0.0.1 flowdst 127.0.0.1:2055
The default protocol version (5) works fine with FastNetMon.
Configuration
-------------
At the very minimum the known networks need to be recorded in
${SYSCONFDIR}/fastnetmon/networks_list in CIDR notation, otherwise all traffic
is classified as "other traffic".
Also a notification script needs to be configured and installed to actually
perform a ban. A stub is provided in
${PREFIX}/share/examples/fastnetmon/notify_about_attack.sh
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