CentOS comes with firewalld by default. It allows you to manage your firewall rules based on zones. This short tutorial will cover only the basic setup with the default ‘public’ zone and how to allow ports in it.

Iptables is a neat tool for every Linux user. The basic yet powerful firewall, allows you to do pretty much everything you want with the network traffic. In this short article we’ll show you how to allow access to a specific TCP port on your cloud server. Read More