Install ConfigServer firewall application


ConfigServer firewall is a popular Linux firewall security suite. It is easy to install, flexible to configure, and secure with extra checks. CSF helps to control exactly what traffic is allowed in and out of the server and to protect the server from malicious attacks.

The installation is quite straightforward:

wget http://www.configserver.com/free/csf.tgz
tar -xzf csf.tgz
cd csf
sh install.sh


To edit the settings of an installed application, use this command:

nano /etc/csf/csf.conf

Additional information about CSF configuration can be found here: http://configserver.com/free/csf/readme.txt.

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