periodic/security/550.ipfwlimit

[Peter Lavee]

On Tue, Feb 22, 2005 at 10:36:43AM +0200, Andriy Gapon wrote:

Quickfixed version, may apply to 4-STABLE, 4-10 & 4.11
---------------------------->8-------------------------------------------------------------------------
#!/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: src/etc/periodic/security/550.ipfwlimit,v 1.2.2.3 2002/08/28 05:13:53 cjc Exp $
#

# Show ipfw rules which have reached the log limit
#

# 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

rc=0

case "$daily_status_security_ipfwlimit_enable" in
    [Yy][Ee][Ss])
        TMP=`mktemp ${TMPDIR:-/tmp}/security.XXXXXXXXXX`
        IPFW_LOG_LIMIT=`sysctl -n net.inet.ip.fw.verbose_limit 2> /dev/null`
        if [ $? -eq 0 ] && [ "${IPFW_LOG_LIMIT}" -ne 0 ]; then
            ipfw -a l | grep " log " | grep -v " logamount " | perl -n -e \
                '/^\d+\s+(\d+)/; print if ($1 >= '$IPFW_LOG_LIMIT')' > ${TMP}
            ipfw -a l | grep " log " | grep " logamount " | perl -n -e \
                '/^\d+\s+(\d+).+?logamount\s+(\d+)/; print if ($1 >= $2)' >> ${TMP}
            if [ -s "${TMP}" ]; then
                rc=1
                echo ""
                echo 'ipfw log limit reached:'
                cat ${TMP}
            fi
        fi
        rm -f ${TMP};;
    *)  rc=0;;
esac

exit $rc
---------------------------->8-------------------------------------------------------------------------
> 
> 550.ipfwlimit check in /etc/periodic/security takes into account only
> global/default verbosity limit and does not account for a specific
> logging limit set for a particular rule e.g.:
> 
> $ ipfw -a l | fgrep log
> 65000     *521*      41764 deny log logamount *1000* ip from any to any
> 
> $ sysctl -n net.inet.ip.fw.verbose_limit
> *100*
> 
> >From security run output:
> 
> ipfw log limit reached:
> 65000     519      41672 deny log logamount 1000 ip from any to any

-- 
WBR,
Peter Lavee
Hostmaster
Technological Systems 
CJVC