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https://github.com/ovh/debian-cis.git
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71 lines
2.3 KiB
Bash
71 lines
2.3 KiB
Bash
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#!/bin/bash
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#
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# CIS Debian 7 Hardening
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# Authors : Thibault Dewailly, OVH <thibault.dewailly@corp.ovh.com>
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#
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#
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# 7.2.7 Enable RFC-recommended Source Route Validation (Scored)
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#
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set -e # One error, it's over
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set -u # One variable unset, it's over
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SYSCTL_PARAMS='net.ipv4.conf.all.rp_filter=1 net.ipv4.conf.default.rp_filter=1'
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# This function will be called if the script status is on enabled / audit mode
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audit () {
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for SYSCTL_VALUES in $SYSCTL_PARAMS; do
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SYSCTL_PARAM=$(echo $SYSCTL_VALUES | cut -d= -f 1)
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SYSCTL_EXP_RESULT=$(echo $SYSCTL_VALUES | cut -d= -f 2)
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debug "$SYSCTL_PARAM must have $SYSCTL_EXP_RESULT"
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has_sysctl_param_expected_result $SYSCTL_PARAM $SYSCTL_EXP_RESULT
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if [ $FNRET != 0 ]; then
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crit "$SYSCTL_PARAM has not $SYSCTL_EXP_RESULT value !"
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elif [ $FNRET = 255 ]; then
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warn "$SYSCTL_PARAM does not exist, typo ?"
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else
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ok "$SYSCTL_PARAM correctly set to $SYSCTL_EXP_RESULT"
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fi
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done
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}
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# This function will be called if the script status is on enabled mode
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apply () {
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for SYSCTL_VALUES in $SYSCTL_PARAMS; do
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SYSCTL_PARAM=$(echo $SYSCTL_VALUES | cut -d= -f 1)
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SYSCTL_EXP_RESULT=$(echo $SYSCTL_VALUES | cut -d= -f 2)
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debug "$SYSCTL_PARAM must have $SYSCTL_EXP_RESULT"
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has_sysctl_param_expected_result $SYSCTL_PARAM $SYSCTL_EXP_RESULT
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if [ $FNRET != 0 ]; then
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warn "$SYSCTL_PARAM has not $SYSCTL_EXP_RESULT value, correcting it"
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set_sysctl_param $SYSCTL_PARAM $SYSCTL_EXP_RESULT
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sysctl -w net.ipv4.route.flush=1 > /dev/null
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elif [ $FNRET = 255 ]; then
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warn "$SYSCTL_PARAM does not exist, typo ?"
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else
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ok "$SYSCTL_PARAM correctly set to $SYSCTL_EXP_RESULT"
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fi
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done
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}
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# This function will check config parameters required
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check_config() {
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:
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}
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# Source Root Dir Parameter
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if [ ! -r /etc/default/cis-hardenning ]; then
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echo "There is no /etc/default/cis-hardenning file, cannot source CIS_ROOT_DIR variable, aborting"
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exit 128
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else
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. /etc/default/cis-hardenning
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if [ -z $CIS_ROOT_DIR ]; then
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echo "No CIS_ROOT_DIR variable, aborting"
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fi
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fi
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# Main function, will call the proper functions given the configuration (audit, enabled, disabled)
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[ -r $CIS_ROOT_DIR/lib/main.sh ] && . $CIS_ROOT_DIR/lib/main.sh
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