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https://github.com/ovh/debian-cis.git
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78 lines
2.4 KiB
Bash
Executable File
78 lines
2.4 KiB
Bash
Executable File
#!/bin/bash
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# run-shellcheck
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#
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# CIS Debian Hardening
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#
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#
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# 3.1.1 Ensure IP forwarding is disabled (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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HARDENING_LEVEL=3
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HARDENING_EXCEPTION=gw
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DESCRIPTION="Disable IP forwarding."
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SYSCTL_PARAMS='net.ipv4.ip_forward net.ipv6.conf.all.forwarding'
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SYSCTL_EXP_RESULT=0
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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_PARAM in $SYSCTL_PARAMS; do
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does_sysctl_param_exists "net.ipv6"
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if [ $FNRET = 0 ] || [[ ! $SYSCTL_PARAM =~ .*ipv6.* ]]; then # IPv6 is enabled or SYSCTL_VALUES doesn't contain ipv6
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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 was not set to $SYSCTL_EXP_RESULT"
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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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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_PARAM in $SYSCTL_PARAMS; do
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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 was not set to $SYSCTL_EXP_RESULT -- Fixing"
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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 $SYSCTL_EXP_RESULT"
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fi
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done
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}
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# This function will check config parameters required
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check_config() {
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:
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}
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# Source Root Dir Parameter
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if [ -r /etc/default/cis-hardening ]; then
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. /etc/default/cis-hardening
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fi
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if [ -z "$CIS_ROOT_DIR" ]; then
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echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
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echo "Cannot source CIS_ROOT_DIR variable, aborting."
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exit 128
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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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if [ -r $CIS_ROOT_DIR/lib/main.sh ]; then
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. $CIS_ROOT_DIR/lib/main.sh
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else
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echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
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exit 128
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fi
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