toggle_security_features.sh #1

#!/bin/bash

# This script enables certain Linux security features to simlulate a security
# hardened environment. It can also disable the same features.

# Usage:
#  To emulate security hardening:
#    toggle_security_features.sh 1
#  To emulate standard security:
#    toggle_security_features.sh 0

set -u

if [[ "${1:-0}" == 1 ]]; then
   echo "Simulate Security Hardening - crontab disallowed by default."

   [[ -r /etc/cron.allow ]] || touch /etc/cron.allow
   chmod 644 /etc/cron.allow
   [[ -e /etc/cron.deny ]] && truncate -s 0 /etc/cron.deny

   echo "cron.allow exists, cron.deny does not exist or is truncated."
else
   echo "Simulate Standard Security - crontab allowed by default."

   [[ -r /etc/cron.allow ]] && rm -f /etc/cron.allow
   [[ -r /etc/cron.deny ]] || touch /etc/cron.deny
   chmod 644 /etc/cron.deny

   echo "cron.deny exists, cron.allow does not exist."
fi