550.ipfwlimit revision 149320 
1#!/bin/sh -
2#
3# Copyright (c) 2001  The FreeBSD Project
4# All rights reserved.
5#
6# Redistribution and use in source and binary forms, with or without
7# modification, are permitted provided that the following conditions
8# are met:
9# 1. Redistributions of source code must retain the above copyright
10#    notice, this list of conditions and the following disclaimer.
11# 2. Redistributions in binary form must reproduce the above copyright
12#    notice, this list of conditions and the following disclaimer in the
13#    documentation and/or other materials provided with the distribution.
14#
15# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18# ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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20# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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24# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25# SUCH DAMAGE.
26#
27# $FreeBSD: head/etc/periodic/security/550.ipfwlimit 149320 2005-08-20 09:41:49Z glebius $
28#
29
30# Show ipfw rules which have reached the log limit
31#
32
33# If there is a global system configuration file, suck it in.
34#
35if [ -r /etc/defaults/periodic.conf ]
36then
37    . /etc/defaults/periodic.conf
38    source_periodic_confs
39fi
40
41rc=0
42
43case "$daily_status_security_ipfwlimit_enable" in
44    [Yy][Ee][Ss])
45	TMP=`mktemp -t security`
46	IPFW_LOG_LIMIT=`sysctl -n net.inet.ip.fw.verbose_limit 2> /dev/null`
47	if [ $? -eq 0 ]; then
48		IPFW_LOG_LIMIT=0
49	fi
50	ipfw -a list | grep " log " | \
51	grep '^[[:digit:]]\+[[:space:]]\+[[:digit:]]\+' | \
52	awk -v limit="$IPFW_LOG_LIMIT" \
53		'{if ($6 == "logamount") {
54			if ($2 > $7)
55				{print $0}
56		} else {
57			if ($2 > limit)
58				{print $0}}
59		}' > ${TMP}
60
61	if [ -s "${TMP}" ]; then
62		rc=1
63		echo ""
64		echo 'ipfw log limit reached:'
65		cat ${TMP}
66	fi
67	rm -f ${TMP};;
68    *)	rc=0;;
69esac
70
71exit $rc
72