nixarmor is a linux hardening automation project
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README.md

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##Linux Hardening Automation Project

travis

This program comes with ABSOLUTELY NO WARRANTY!

Be Advised, do NOT use in production environments!

Wikipedia's description for Hardening:

In computing, hardening is usually the process of securing a system
by reducing its surface of vulnerability.
A system has a larger vulnerability surface the more functions
it fulfills; in principle a single-function system is more secure
than a multipurpose one.
Reducing available vectors of attack typically includes the
removal of unnecessary software, unnecessary usernames or
logins and the disabling or removal of unnecessary services.[1]

[1]Hardening(computing)

##USAGE

Clone the repository.

git clone https://github.com/emirozer/nixarmor.git

Run the related automation script based on your distribution.

OR

You can try the environment via using vagrant. Go to the /vagrant/.. dir and pick the distro you are interested in.

vagrant up

I am assuming you have vagrant on your system packages for this task. ###CHKROOTKIT & Cron Job

Chkrootkit is installed for ubuntu/debian/fedora and ran once.

For centOS, yum won't serve this package so you have to get it manually.

It is in your best interest to run chkrootkit daily. Here are some basic universal instructions:

vi /etc/cron.daily/chkrootkit.sh

#!/bin/bash
cd /your_installpath/chkrootkit-0.42b/
./chkrootkit | mail -s “Daily chkrootkit from Servername” admin@youremail.com

Note

  1. Replace ‘your_installpath’ with the actual path to where you unpacked Chkrootkit.

  2. Change ‘Servername’ to the server which you are running.

  3. Change ‘admin@youremail.com’ to your actual email address where the script will mail you.

Save the file.

Change the file permissions

chmod 755 /etc/cron.daily/chkrootkit.sh

Small note about unattanded updates: It is a good idea if and only if you compose your own black list..Meaning put everything that you find upgrading without supervision risky. http://askubuntu.com/questions/193773/can-i-configure-unattended-upgrades-to-not-upgrade-packages-that-require-a-reboo