What is CSF in Ubuntu?

Config Server Firewall (or CSF) is a free and advanced firewall for most Linux distributions and Linux based VPS. In addition to the basic functionality of a firewall – filtering packets – CSF includes other security features, such as login/intrusion/flood detections.

What is CSF firewall?

ConfigServer Firewall (CSF) is a Firewall software installed on your server to keep it secure. It provides an advanced and easy-to-use web-based interface to manage firewall settings. With this firewall service, you can: Control traffic flowing into your server space.

How do you activate CSF?

To Enable CSF

  1. Log into WHM.
  2. Navigate to ConfigServer Security & Firewall.
  3. Click “Firewall Enable”

How do I add a firewall to cPanel?

How to Install CSF (ConfigServer & Security Firewall) on cPanel

  1. Step 1 – Install CSF Firewall. First download latest source code of CSF firewall and extract on your system using following commands.
  2. Step 2 – Configure CSF Firewall. Now edit /etc/csf/csf.
  3. Step 3 – Manage CSF with Command Line.

How do I check my CSF status?

You should have the SSH login permission to the ‘Server’ in-order to start or stop the CSF. Initially, login to the server through ssh using a Terminal or Putty. To check the status of CSF, run the command.

What is CSF & LFD?

ConfigServer Security & Firewall (CSF) is a Stateful Packet Inspection (SPI) firewall, login/intrusion detection, and security application for Linux servers provided by ConfigServer. Login Failure Daemon (LFD) is a daemon process that runs on our servers, which uses CSF for server security.

How do you block IP address in CSF?

Block an IP from WHM:

  1. Log in to WHM as root.
  2. Navigate to Plugins section, then to ConfigServer Security & Firewall.
  3. Look for the Quick Deny section/button.
  4. Click the Quick Deny button.
  5. The IP will be added to the block list – /etc/csf/csf.deny file – and you will see a confirmation message:

How do I know if my IP is blocked in CSF?

This will allow lfd to reference csf. ignore. If you add an IP address to csf….Useful CSF SSH Command Line Commands (CSF Cheat Sheet)

Command Description Example
csf -dr [IP.add.re.ss] Unblock an IP and remove from /etc/csf/csf.deny [email protected][~]#csf -dr
csf -df Remove and unblock all entries in /etc/csf/csf.deny [email protected][~]#csf -df

How do you stop a CSF leak?

Drinking more fluids, especially drinks with caffeine, can help slow or stop the leak and may help with headache pain. Headache may be treated with pain relievers and fluids. If the headache lasts longer than a week after a lumbar puncture, a procedure may be done to block the hole that may be leaking fluid.

What is CSF in cPanel?

ConfigServe Firewall (CSF) is a firewall configuration script created to provide better security for your server while giving you an easy to use and advanced interface for managing your firewall settings in cPanel servers.

How do I add CSF to WHM?

To install CSF, perform the following steps:

  1. Log in to your server as the root user via SSH.
  2. Run the cd /root command to change to the root directory.
  3. Run the tar -xzf csf.
  4. Run the cd csf command to change directories.
  5. To begin the CSF installation, run the ./install.cpanel.sh command.

What is Lfd in CSF?

Short for Login Failure Daemon, LFD is a process that’s part of the CSF (ConfigServer Security & Firewall) that periodically checks for potential threats to a server. LFD looks for such attacks as brute-force login attempts and if found blocks the IP address attempting to attack that server.