Network interfaces are assigned a zone to dictate the behavior that the firewall should allow.įor computers that might move between networks frequently (like laptops), this kind of flexibility provides a good method of changing your rules depending on your environment. Zones are basically sets of rules dictating what traffic should be allowed depending on the level of trust you have in the networks your computer is connected to. The firewalld daemon manages groups of rules using entities called “zones”. Basic Concepts in Firewalldīefore we begin talking about how to actually use the firewall-cmd utility to manage your firewall configuration, we should get familiar with a few basic concepts that the tool introduces. The behavior of some of the commands explained in this guide may vary depending on your specific configuration. Note: There is a chance that you may be working with a newer version of firewalld than was available at the time of this writing, or that your server was set up slightly differently than the example server used throughout this guide.
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