How to Install CSF Firewall on CentOS Cloud Server (VPS)

If you are using Cloud Server (VPS), certainly the firewall is one of the top priorities to secure your web server. One of the most preferred server firewall tools is CSF (Config Server Firewall). CSF is an open source firewall tool for a web server.

CSF has many web security features and functions for Linux-based servers. One of them is the Login Failure Daemon (LFD). LFD will run all of the time to monitor if there is a user or IP that fails to login to the server, also useful to detect bruteforce attacks.

Some important features of CSF:

How to install CSF CentOS-based Cloud Server

Here’s you guide to CSF installation on CentOS 6 Cloud Server (VPS). Follow the steps below.

Install the libwww-perl Library

# yum install perl-libwww-perl

Download CSF.

# cd /tmp
# wget http://www.configserver.com/free/csf.tgz

Install CSF.

# cd /tmp
# tar -xzf csf.tgz
# cd csf
#sh install.sh

Start the CSF Configuration

By default, when it is the first time you install the CSF, it will be active in “testing mode”. So, when enabling it, you should replace the row TESTING = “1” to TESTING = “0” on in the /etc/csf/csf.conf file. You can use the text editor to edit it.

# vi /etc/csf/csf.conf

To load the CSF automatically when the server is in a Start Up, use the following command.

# chkconfig --level 235 csf on
# service csf restart

To Remove or Uninstall the CSF.

# /etc/csf/uninstall.sh

That’s all the glance of CSF firewall tool installation in CentOS-based Cloud Server (VPS).

The Advantages and Disadvantages of Using Web Application Firewall (WAF)

Before you install any web application firewall on your cloud server or VPS, you should consider whether or not you need it. Therefore, you need to know the advantages and disadvantages of web application firewall.

The Advantages of Web Application Firewall:

The Disadvantages of Web Application Firewall:

Finally, those advantages and disadvantages of web application firewall above show you why you need or why you don’t need to install one on your web server.

How to Install CSF Firewall on CentOS Cloud Server (VPS) was last modified: July 18th, 2017 by