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Installing CSF firewall and LFD (login failure daemon)


Installation is quite straightforward:

SSH into your VPS as root and run

rm -fv csf.tgz
tar -xzf csf.tgz
cd csf

Next, test whether you have the required iptables modules:

perl /etc/csf/

Don't worry if you cannot run all the features, so long as the script doesn't report any FATAL errors

You should not run any other iptables firewall configuration script. For example, if you previously used APF+BFD you can remove the combination (which you will need to do if you have them installed otherwise they will conflict horribly):

sh /etc/csf/

That's it. You can then configure csf and lfd by edit the files directly in /etc/csf/*, or on cPanel servers use the WHM UI

csf installation for cPanel is preconfigured to work on a cPanel server with all the standard cPanel ports open.

csf installation for DirectAdmin is preconfigured to work on a DirectAdmin server with all the standard DirectAdmin ports open.

csf auto-configures your SSH port on installation where it's running on a non-standard port.

csf auto-whitelists your connected IP address where possible on installation.

You should ensure that kernel logging daemon (klogd) is enabled. Typically, VPS servers have this disabled and you should check /etc/init.d/syslog and make sure that any klogd lines are not commented out. If you change the file, remember to restart syslog.

See the readme.txt file for more information.

Webmin Module Installation/Upgrade

To install or upgrade the csf webmin module:

  1. Install csf as above
  2. Install the csf webmin module in:

  Webmin > Webmin Configuration > Webmin Modules >

  From local file > /etc/csf/csfwebmin.tgz > Install Module


Removing csf and lfd is even more simple:

On cPanel servers:

cd /etc/csf

On DirectAdmin servers:

cd /etc/csf

On generic linux servers:

cd /etc/csf
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