Create npf.conf for the NPF packet filter

This file adds support for the NPF packet filter, available on NetBSD since version 6.0

config/action.d/npf.conf

@@ -0,0 +1,61 @@
+# Fail2Ban configuration file
+#
+# NetBSD npf ban/unban
+#
+# Author: Nils Ratusznik <nils@NetBSD.org>
+# Based on pf.conf action file
+#
+
+[Definition]
+
+# Option:  actionstart
+# Notes.:  command executed once at the start of Fail2Ban.
+# Values:  CMD
+#
+# we don't enable NPF automatically, as it will be enabled elsewhere
+actionstart = 
+
+
+# Option:  actionstop
+# Notes.:  command executed once at the end of Fail2Ban
+# Values:  CMD
+#
+# we don't disable NPF automatically either
+actionstop = 
+
+
+# Option:  actioncheck
+# Notes.:  command executed once before each actionban command
+# Values:  CMD
+#
+actioncheck = 
+
+
+# Option:  actionban
+# Notes.:  command executed when banning an IP. Take care that the
+#          command is executed with Fail2Ban user rights.
+# Tags:    <ip>  IP address
+#          <failures>  number of failures
+#          <time>  unix timestamp of the ban time
+# Values:  CMD
+#
+actionban = /sbin/npfctl table <tablename> add <ip>
+
+
+# Option:  actionunban
+# Notes.:  command executed when unbanning an IP. Take care that the
+#          command is executed with Fail2Ban user rights.
+# Tags:    <ip>  IP address
+#          <failures>  number of failures
+#          <time>  unix timestamp of the ban time
+# Values:  CMD
+#
+# note -r option used to remove matching rule
+actionunban = /sbin/npfctl table <tablename> rem <ip>
+
+[Init]
+# Option:  tablename
+# Notes.:  The pf table name.
+# Values:  [ STRING ]
+#
+tablename = fail2ban