How to Install CSF On Ubuntu





The CSF(ConfigServer Firewall) firewall program is a powerful tool that enhances the security of your Linux system. Additionally, it has a Login Failure Daemon (LFD) that monitors your server for failed login attempts as well as performing actions on culprit IP addresses.






In this article, we will explain How to Install CSF On Ubuntu and protect the server.






Step 1: Getting your system up and running





  1. Sign in to your system or register a newly created one by logging in to your VPSie account
  2. Connect by SSH using the credentials we emailed you.
  3. Once you have logged into your Ubuntu instance, run these commands to update your system.
apt-get update && apt-get upgrade -y




We need to do is to make sure CSF isn’t installed. This can be done by running a status check; run the following command:




# /etc/init.d/csf status







Step 2: Install CSF






It’s time to download the package using the following command:








Then unpack the files with the following command:



tar -xzf csf.tgz






Step 4: Install via the Script






After unpacking, switch to the newly created directory:



cd csf




Run the installer,








You will then see “Installation Complete” as confirmation.






Step 4: Test the Installation



Run the following command to test the installation,

perl /usr/local/csf/bin/


# perl /usr/local/csf/bin/
Testing ip_tables/iptable_filter...OK
Testing ipt_LOG...OK
Testing ipt_multiport/xt_multiport...OK
Testing ipt_REJECT...OK
Testing ipt_state/xt_state...OK
Testing ipt_limit/xt_limit...OK
Testing ipt_recent...OK
Testing xt_connlimit...OK
Testing ipt_owner/xt_owner...OK
Testing iptable_nat/ipt_REDIRECT...OK
Testing iptable_nat/ipt_DNAT...OK

RESULT: csf should function on this server

There you have it! Your CSF installation is complete, and we will provide you with best practices in this area within the next few days. We hope this was informative for you.

TRhanks for reading! I hope it was informative for you! 







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