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#!/bin/bash
# msec: network security checks
# check if we are run from main script
if [ -z "$MSEC_TMP" -o -z "$INFOS" -o -z "$SECURITY" -o -z "$DIFF" -o -z "$SECURITY_LOG" -o -z "${CURRENT_CHECK_TYPE}" ]; then
# variables are set in security.sh and propagated to the subscripts
echo "Error: this check should be run by the main msec security check!"
echo " do not run it directly unless you know what you are doing."
exit 1
fi
export OPEN_PORT_TODAY="/var/log/security/open_port.${CURRENT_CHECK_TYPE}.today"
OPEN_PORT_YESTERDAY="/var/log/security/open_port.${CURRENT_CHECK_TYPE}.yesterday"
OPEN_PORT_DIFF="/var/log/security/open_port.${CURRENT_CHECK_TYPE}.diff"
export FIREWALL_TODAY="/var/log/security/firewall.${CURRENT_CHECK_TYPE}.today"
FIREWALL_YESTERDAY="/var/log/security/firewall.${CURRENT_CHECK_TYPE}.yesterday"
FIREWALL_DIFF="/var/log/security/firewall.${CURRENT_CHECK_TYPE}.diff"
if [[ -f ${OPEN_PORT_TODAY} ]]; then
mv -f ${OPEN_PORT_TODAY} ${OPEN_PORT_YESTERDAY}
fi
if [[ -f ${FIREWALL_TODAY} ]]; then
mv -f ${FIREWALL_TODAY} ${FIREWALL_YESTERDAY}
fi
if check_is_enabled "${CHECK_OPEN_PORT}" ; then
if [[ ${IGNORE_PID_CHANGES} = yes ]]; then
FILTER="sed -e s/\(PID\|[0-9]*\)\/\(.*\)$/\2/g"
else
FILTER="cat"
fi
netstat -pvlA inet,inet6 2> /dev/null | $FILTER > ${OPEN_PORT_TODAY};
Filter ${OPEN_PORT_TODAY} CHECK_OPEN_PORT
Count ${INFOS} ${OPEN_PORT_TODAY} "Total of open network ports"
fi
if check_is_enabled "${CHECK_FIREWALL}" ; then
iptables -S 2>/dev/null > ${FIREWALL_TODAY}
Filter ${FIREWALL_TODAY} CHECK_FIREWALL
Count ${INFOS} ${FIREWALL_TODAY} "Total of configured firewall rules"
fi
### Changed open port
if check_is_enabled "${CHECK_OPEN_PORT}" ; then
Diffcheck ${OPEN_PORT_TODAY} ${OPEN_PORT_YESTERDAY} ${OPEN_PORT_DIFF} "processes with open network ports"
fi
### Changed firewall
if check_is_enabled "${CHECK_FIREWALL}" ; then
Diffcheck ${FIREWALL_TODAY} ${FIREWALL_YESTERDAY} ${FIREWALL_DIFF} "firewall rules"
fi
### Dump a list of open port.
if check_is_enabled "${CHECK_OPEN_PORT}" ; then
if [[ -s ${OPEN_PORT_TODAY} ]]; then
printf "\nThese are the ports listening on your machine :\n" >> ${SECURITY}
cat ${OPEN_PORT_TODAY} >> ${SECURITY}
fi
fi
### Check if network is in promisc mode
if check_is_enabled "${CHECK_PROMISC}" ; then
export SECURITY
/usr/share/msec/promisc_check.sh
fi
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