Add a new /etc/periodic/security script to check for packets

rejected by ipfilter (510.ipfdenied), and a corresponding periodic.conf
knob (daily_status_security_ipfdenied_enable).

Reviewed by:	roberto
Approved by:	re@

3 files changed, 63 insertions, 0 deletions

diff --git a/etc/defaults/periodic.conf b/etc/defaults/periodic.conf
index 6ae7fe6..14f2282 100644
--- a/etc/defaults/periodic.conf
+++ b/etc/defaults/periodic.conf
@@ -150,6 +150,9 @@ daily_status_security_passwdless_enable="YES"
 # 500.ipfwdenied
 daily_status_security_ipfwdenied_enable="YES"
 
+# 510.ipfdenied
+daily_status_security_ipfdenied_enable="YES"
+
 # 550.ipfwlimit
 daily_status_security_ipfwlimit_enable="YES"
 
diff --git a/etc/periodic/security/510.ipfdenied b/etc/periodic/security/510.ipfdenied
new file mode 100644
index 0000000..9b3658e
--- /dev/null
+++ b/etc/periodic/security/510.ipfdenied
@@ -0,0 +1,53 @@
+#!/bin/sh -
+#
+# Copyright (c) 2001  The FreeBSD Project
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+# 1. Redistributions of source code must retain the above copyright
+#    notice, this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright
+#    notice, this list of conditions and the following disclaimer in the
+#    documentation and/or other materials provided with the distribution.
+#
+# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+# ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+# SUCH DAMAGE.
+#
+# $FreeBSD$
+#
+
+# If there is a global system configuration file, suck it in.
+#
+if [ -r /etc/defaults/periodic.conf ]
+then
+    . /etc/defaults/periodic.conf
+    source_periodic_confs
+fi
+
+. /etc/periodic/security/security.functions
+
+rc=0
+
+case "$daily_status_security_ipfdenied_enable" in
+    [Yy][Ee][Ss])
+	TMP=`mktemp ${TMPDIR:-/tmp}/security.XXXXXXXXXX`
+	if ipfstat -nhio 2>/dev/null | grep block > ${TMP}; then
+	  check_diff new_only ipf ${TMP} "${host} ipf denied packets:"
+	fi
+	rc=$?
+	rm -f ${TMP};;
+    *)	rc=0;;
+esac
+
+exit $rc
diff --git a/share/man/man5/periodic.conf.5 b/share/man/man5/periodic.conf.5
index 3b3d762..e917929 100644
--- a/share/man/man5/periodic.conf.5
+++ b/share/man/man5/periodic.conf.5
@@ -480,6 +480,13 @@ Set to
 to show log entries for packets denied by
 .Xr ipfw 8
 since yesterday's check.
+.It Va daily_status_security_ipfdenied_enable
+.Pq Vt bool
+Set to
+.Dq YES
+to show log entries for packets denied by
+.Xr ipf 8
+since yesterday's check.
 .It Va daily_status_security_ipfwlimit_enable
 .Pq Vt bool
 Set to