mirror of
https://github.com/ovh/debian-cis.git
synced 2025-08-31 11:54:07 +02:00
4be1a9d9e4
- iptables_loopback.sh -> 4.3.2.2 - iptables_rule_them_all.sh -> 4.3.2.4 - iptables_outbound_established.sh -> 4.3.2.3 - ip6tables_loopback.sh -> 4.3.3.2 - ip6tables_outbound_established.sh -> 4.3.3.3 - ip6tables_rule_them_all.sh -> 4.3.3.4 - ip6tables_default_deny_policy.sh -> 4.3.3.1
98 lines
2.9 KiB
Bash
98 lines
2.9 KiB
Bash
#!/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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# Ensure ip6tables default deny firewall policy (Manual)
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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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# shellcheck disable=2034
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HARDENING_LEVEL=2
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# shellcheck disable=2034
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DESCRIPTION="Ensure ip6tables default deny firewall policy"
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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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INPUT_CHAIN_DROP=1
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OUTPUT_CHAIN_DROP=1
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FORWARD_CHAIN_DROP=1
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local input_default=""
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local output_default=""
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local forward_default=""
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input_default=$($SUDO_CMD ip6tables -S INPUT | awk '/^-P/ {print $3}')
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output_default=$($SUDO_CMD ip6tables -S OUTPUT | awk '/^-P/ {print $3}')
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forward_default=$($SUDO_CMD ip6tables -S FORWARD | awk '/^-P/ {print $3}')
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if [ "$input_default" != "DROP" ]; then
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crit "ip6tables 'INPUT' chain does not have 'DROP' has default policy"
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else
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ok "ip6tables 'input' chain has 'DROP' has default policy"
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INPUT_CHAIN_DROP=0
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fi
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if [ "$output_default" != "DROP" ]; then
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crit "ip6tables 'OUTPUT' chain does not have 'DROP' has default policy"
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else
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ok "ip6tables 'OUTPUT' chain has 'DROP' has default policy"
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OUTPUT_CHAIN_DROP=0
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fi
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if [ "$forward_default" != "DROP" ]; then
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crit "ip6tables 'FORWARD' chain does not have 'DROP' has default policy"
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else
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ok "ip6tables 'FORWARD' chain has 'DROP' has default policy"
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FORWARD_CHAIN_DROP=0
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fi
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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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audit
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if [ "$INPUT_CHAIN_DROP" -ne 0 ]; then
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info "Please review your ip6tables default 'INPUT' policy. We wont apply it for you to avoid cutting the branch you are sitting on"
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fi
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if [ "$OUTPUT_CHAIN_DROP" -ne 0 ]; then
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info "Please review your ip6tables default 'OUTPUT' policy. We wont apply it for you to avoid cutting the branch you are sitting on"
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fi
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if [ "$FORWARD_CHAIN_DROP" -ne 0 ]; then
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info "Please review your ip6tables default 'FORWARD' policy. We wont apply it for you to avoid cutting the branch you are sitting on"
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fi
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}
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# This function will check config parameters required
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check_config() {
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:
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}
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# Source Root Dir Parameter
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if [ -r /etc/default/cis-hardening ]; then
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# shellcheck source=../../debian/default
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. /etc/default/cis-hardening
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fi
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if [ -z "$CIS_LIB_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_LIB_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 "${CIS_LIB_DIR}"/main.sh ]; then
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# shellcheck source=../../lib/main.sh
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. "${CIS_LIB_DIR}"/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_LIB_DIR in /etc/default/cis-hardening"
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exit 128
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fi
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