How to Block Traffic by Country in the CSF Firewall

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 CIDR range covers all the IP addresses assigned to that country. Continue reading “How to Block Traffic by Country in the CSF Firewall”

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

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 restrict international access to services such as WHM/cPanel, SSH, or FTP. Continue reading “How to Block or Allow Specific Ports by Country in the CSF Firewall”

Basic DoS/DDoS Mitigation with the CSF Firewall

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 (networks of infected computers that can be remotely controlled) continue to grow at a rapid pace, making DoS and DDoS attacks much more common.

Fortunately, CSF can be used to help mitigate small attacks. Continue reading “Basic DoS/DDoS Mitigation with the CSF Firewall”