Install Brute Force Detection on your Dedicated Server

Install Brute Force Detection on your Dedicated Server

Brute Force Detection is a modular shell script for parsing applicable logs and checking for authentication failures.

Hackers use the brute force method to gain access to a server these days. Installation, configuration and usage of this script is pretty simple and anybody can work with this.

Brute Force Detection is available at: http://www.rfxnetworks.com/bfd.php

This guide will show you how to install and configure BFD to protect your dedicated server from brute force hack attempts.

Requirements:

  • You MUST have APF Firewall Installed before installing BFD – it works with APF and requires some APF files to operate.
  • Root SSH access to your server.

Login to your server through SSH and su to the root user.

1. cd /root/downloads or another temporary folder where you store your files.

2. wget http://www.rfxnetworks.com/downloads/bfd-current.tar.gz

3. tar -xvzf bfd-current.tar.gz

4. cd bfd-0.2

5. Run the install file: ./install.sh

You will receive a message saying it has been installed

.: BFD installed
Install path: /usr/local/bfd
Config path: /usr/local/bfd/conf.bfd
Executable path: /usr/local/sbin/bfd

6. Lets edit the configuration file: pico /usr/local/bfd/conf.bfd

7. Enable brute force hack attempt alerts:
Find: ALERT_USR=”0″ CHANGE TO: ALERT_USR=”1″

Find: EMAIL_USR=”root” CHANGE TO: EMAIL_USR=”your@yourdomain.com”

Save the changes: Ctrl+X then Y

8. Prevent locking yourself out!
pico -w /usr/local/bfd/ignore.hosts and add your own trusted IPs
Eg: 192.168.1.1

Save the changes: Ctrl+X then Y

BFD uses APF’ cli insert feature and as such will override any allow_hosts.rules entries users have in-place. So be sure to add your trusted ip addresses to the ignore file to prevent locking yourself out.

9. Run the program!
/usr/local/sbin/bfd -s

We hope you find this tutorial very useful and easy to understand. Do not hesitate to ask your questions about this tutorial via comments.


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