Before installing much else on the server I advise to install CSF before you install other plugins. There are a couple of settings that need to be adjusted after installation to get it to work with Ajenti control panel.
I had a couple of issues getting CSF to work well with the panel but after adjusting these settings and double checking my conf file everything works well. This is on Ubuntu 14.04 lts server hvm on AWS Ec2 instance by the way.


Download the source file

wget http://www.configserver.com/free/csf.tgz
or
https://download.configserver.com/csf.tgz

2. Extract the file

tar -xzf csf.tgz

3. Run the installation script

cd csf
sh install.sh

4. Remove APF/BFD
If the server already installed with APF/BFD firewall, you need to uninstall it as they will conflict each other.

sh /etc/csf/remove_apf_bfd.sh

5. Before configuring the modules, you need to test the Iptable modules

perl /etc/csf/csftest.pl

If it doesn’t shows any fatal errors, we can go ahead with CSF configuration
cd into /etc/csf and

.
sudo nano csf.conf  or if root just nano csf.conf

file and make sure port 8000 is allowed in and out

TCP_IN = “20,21,22,25,53,80,110,143,443,465,587,993,995,8000”
TCP_OUT = “20,21,22,25,37,43,53,80,110,113,443,8000”

without underlines of course. Don't forget to allow your particular ip address in as well or else the control panel will be unreachable:

1. Allow an Ip address on the server

csf –a xxx.xxx.xx.xx

If your panel was already loaded in your browser window, restart the server from the control panel window. You will be logged out automatically. Log back in and check that the plugin is enabled in under the system heading on the left menu. If it is, you are good to go and can now configure CSF from within Ajenti.

Dale

where's the dns entry box?