Setup ConfigServer Security and Firewall (CSF) on CentOS 7

ConfigServer Security & Firewall (CSF) is a stateful packet inspection firewall (SPI), login/intrusion detection, and security application for Linux servers. It is a very popular security suite, but isn't officially supported yet on CentOS 7.

CentOS 7 uses firewalld rather than iptables. A quick internet search will show that many faithful CentOS users find firewalld far too complicated for their needs and are reverting back to iptables. Iptables was the standard firewall for CentOS 5 and 6.

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