feat: add new checks for debian12

systemd_timesyncd_is_enabled_and_running.sh	-> 2.3.2.2
rpcbind_is_disabled.sh				-> 2.1.12
ftp_client_not_installed.sh			-> 2.2.6
chrony_with_chrony_user.sh			-> 2.3.3.2
ipv6_is_enabled.sh				-> 3.1.1

bin/hardening/ipv6_is_enabled.sh

@@ -0,0 +1,59 @@
+#!/bin/bash
+
+# run-shellcheck
+#
+# CIS Debian Hardening
+#
+
+#
+# Ensure IPv6 status is identified (Manual)
+#
+
+set -e # One error, it's over
+set -u # One variable unset, it's over
+
+# shellcheck disable=2034
+HARDENING_LEVEL=3
+# shellcheck disable=2034
+DESCRIPTION="Ensure IPv6 status is identified"
+
+# This function will be called if the script status is on enabled / audit mode
+audit() {
+    is_ipv6_enabled
+    if [ "$FNRET" -eq 0 ]; then
+        ok "ipv6 is enabled"
+    else
+        crit "ipv6 is disabled"
+    fi
+
+}
+
+# This function will be called if the script status is on enabled mode
+apply() {
+    info "Enable or disable manually IPv6 in accordance with system requirements and local site policy"
+}
+
+# This function will check config parameters required
+check_config() {
+    :
+}
+
+# Source Root Dir Parameter
+if [ -r /etc/default/cis-hardening ]; then
+    # shellcheck source=../../debian/default
+    . /etc/default/cis-hardening
+fi
+if [ -z "$CIS_LIB_DIR" ]; then
+    echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
+    echo "Cannot source CIS_LIB_DIR variable, aborting."
+    exit 128
+fi
+
+# Main function, will call the proper functions given the configuration (audit, enabled, disabled)
+if [ -r "${CIS_LIB_DIR}"/main.sh ]; then
+    # shellcheck source=../../lib/main.sh
+    . "${CIS_LIB_DIR}"/main.sh
+else
+    echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_LIB_DIR in /etc/default/cis-hardening"
+    exit 128
+fi