How to Install ConfigServer Firewall (CSF) on Ubuntu

Reading Time: 4 minutes What is a Firewall? Broadly speaking, a firewall is part of a network or server that is designed to restrict potentially malicious and unauthorized access to the hardware while still allowing outward communication from the network or server.  There are two types of firewalls; physical hardware firewalls which are devices that connect to the destination [ Read More ]

Basic DoS/DDoS Mitigation with the CSF Firewall

Reading Time: 5 minutes Denial of Service (DoS) and Distributed Denial of Service (DDoS) attacks are common threats that every publicly accessible web server faces. The purpose of such attacks, in simplest terms, is to flood a server with connections, overloading it and preventing from accepting legitimate traffic. Attacks increasingly have become automated instead of directly targeted and botnets [ Read More ]

How to Block or Allow Specific Ports by Country in the CSF Firewall

Reading Time: 4 minutes In addition to being able to manage traffic from a specific country or a list of countries, CSF allows you to manage access by country to specific ports. This can be useful if you need to ensure that a particular service is available globally (such as your web server on port 80) but want to [ Read More ]

How to Block Traffic by Country in the CSF Firewall

Reading Time: 3 minutes One of the most-requested features on cPanel servers is the ability to manage and filter traffic at a country level. With the ConfigServer Firewall (CSF) plugin in WebHost Manager, you can do exactly that. Country-level filtering in CSF uses the Maxmind GeoLite Country database to obtain CIDR (Classless Inter-Domain Routing) ranges for specific countries. Each [ Read More ]

How to Open a Port in CSF with WHM/cPanel

Reading Time: 3 minutes The Config Server Firewall offers several advantages over the Advanced Policy Firewall, including more robust protection against Denial of Service, SYN flood and other common attacks. But one of its most appealing features is its plugin for WebHost Manager that allows you to quickly access firewall settings and common tasks through a graphical interface. Pre-Flight [ Read More ]

How to Manage the CSF Firewall in WHM/cPanel

Reading Time: 4 minutes Should you discover (or suspect) that a client or customer’s IP address has been blocked in the firewall, or you just need to open (or close) a port on your cPanel server, you may be able to quickly resolve the issue yourself if you have access to WebHost Manager and the ConfigServer Firewall (CSF). If [ Read More ]

How To Unblock an IP Address in CSF

Reading Time: 1 minute CSF is generally considered an advanced firewall given it has many more configuration options than most other software firewalls (such as APF). It’s also still simple enough to install and configure, even for novice system administrators. For a simple overview on how to install and configure CSF and its security plugin LFD (Login Failure Daemon), [ Read More ]

CSF: Config Server Firewall Installation

Reading Time: 5 minutes An alternative firewall to APF is the Config Server Firewall, or CSF. CSF is generally considered a more advanced firewall as there are more configuration options compared to other firewalls, while still being simple enough to install and configure that even novice administrators can use it. This article will give you a simple overview about [ Read More ]