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-rw-r--r--share/ipf/nat.24
1 files changed, 4 insertions, 0 deletions
diff --git a/share/ipf/nat.2 b/share/ipf/nat.2
index ee0002dc2cb..f3617374f68 100644
--- a/share/ipf/nat.2
+++ b/share/ipf/nat.2
@@ -3,6 +3,10 @@
Don't forget to add "option GATEWAY" to the kernel config file or NAT will
not work. NAT requires IP packet forwarding.
+Don't forget to add "option IPFILTER" (and maybe "option IPFILTER_LOG"
+if you want ipmon(8) to work) to the kernel config file or NAT will
+not work. NAT requires the IPF packet filter.
+
You must have IPF enabled even if you aren't using it for anything or
NAT will not work. The standard way to do this is to make sure
/etc/ipf.rules is installed and edit /etc/rc.conf changing