Instructions to install CSF Firewall on CentOS 7 - HOSTVN Blog

Install CSF Firewall - ConfigServer Security & Firewall (CSF) is a firewall application that allows login / intrusion detection and security for Linux servers.

CentOS 7 uses Firewalld instead of iptables. Many loyal CentOS users find Firewalld too complex for their needs and are returning to iptables. Iptables is the standard firewall for CentOS 5 and 6.

In this article HOSTVN I will show you how to turn off Firewalld, install iptables in combination with ConfigServer Security & Firewall (CSF) to enhance the security for my VPS / Server Linux.

Install CSF Firewall

Install CSF Firewall on CentOS 7

Step 1: Stop and disable the firewall.

To stop and disable Firewalld on centos, you use the following 2 commands

Step 2: Install iptables.

After stopping and disabling Firewalld, we will install ibtables

  • Create the necessary file by iptables.
  • Activate iptables every time you restart VPS / Server.

Step 3: Install the necessary libraries.

Next, you need to install the libraries needed for the operation of CSF

Step 4: install CSF.

After fully installing the libraries we install CSF. Installation is as simple as the commands below

  • Remove the installation file.

Now we will check if CSF actually works on the server. We will do a test to verify.

If you see results as shown below, then CSF will work without any problems on your server.

Step 5: Configure CSF

Next, we will need to configure CSF by editing the file /etc/csf/csf.confcsf.conf. In this article HOSTVN Using the nano editor for editing, you can use VIM if you want.

If meeting notice -bash: nano: command not found meaning that you have not installed nano, you can install nano with the following command

You will need to correct some of the parameters below

  • Note: For convenience when using nano you can use keystrokes ctrl + w to search. (Details you can see in the video tutorial).

After editing you proceed to start csf

To check if csf is working or not you can use the following command

Screenshot_27

Some basic commands

Start CSFcsf -s
Flush / Stop firewall rules (note: lfd may restart csf)csf -f
Restart CSFcsf -r
Allow an IPcsf -a ip-address
Deny IPcsf -d ip-address
Remove and unblock all entriescsf -df
Stop firewallcsf -x
Enable firewallcsf -e

Conclude

In this article, HOSTVN will guide you how to turn off Firewalld, install iptables in combination with ConfigServer Security & Firewall (CSF) to enhance the security for your VPS / Server Linux. If you have any comments you can leave a comment below. Also you can see more 10 criteria to choose the best VPS in 2020.

Nguyen Diep

My name is Nguyen Manh Cuong. I was born in a poor village in Ba Vi district, HA NOI province - windy and sunny land. Currently

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