Firewall Management
Getting to Know Firewalld
© Gino Santa Maria, Fotolia
Managing a firewall can be a hassle, but it’s worse to manage a breach because you didn’t have one.
Special Thanks: This article was made possible by support from Linux Professional Institute
A firewall is an important part of a security strategy, but it is only one component and is not a security panacea for reasons that will become clear later in the discussion. A host-based firewall protects the local system just as a network firewall protects an entire network or part of a network, such as a DMZ.
Firewalld is the default firewall installed on CentOS 7 and newer, Red Hat Enterprise Linux 7 and newer (RHEL), and Fedora 18 and newer. If you use a Red Hat-based distribution, then you probably have it already. If you use other distributions, it’s available via git and as a tarball from firewalld.org. Firewalld uses zones to define trust levels of network connections or interfaces. Zones are an advanced topic not covered in this article. There will be a future article that covers firewalld zones.
[...]
Buy Linux Magazine
US / Canada
UK / Australia
Subscribe to our Linux Newsletters
Find Linux and Open Source Jobs
Subscribe to our ADMIN Newsletters
Support Our Work
Linux Magazine content is made possible with support from readers like you. Please consider contributing when you’ve found an article to be beneficial.
News
-
System76 Releases COSMIC Alpha 7
With scores of bug fixes and a really cool workspaces feature, COSMIC is looking to soon migrate from alpha to beta.
-
OpenMandriva Lx 6.0 Available for Installation
The latest release of OpenMandriva has arrived with a new kernel, an updated Plasma desktop, and a server edition.
-
TrueNAS 25.04 Arrives with Thousands of Changes
One of the most popular Linux-based NAS solutions has rolled out the latest edition, based on Ubuntu 25.04.
-
Fedora 42 Available with Two New Spins
The latest release from the Fedora Project includes the usual updates, a new kernel, an official KDE Plasma spin, and a new System76 spin.
-
So Long, ArcoLinux
The ArcoLinux distribution is the latest Linux distribution to shut down.
-
What Open Source Pros Look for in a Job Role
Learn what professionals in technical and non-technical roles say is most important when seeking a new position.
-
Asahi Linux Runs into Issues with M4 Support
Due to Apple Silicon changes, the Asahi Linux project is at odds with adding support for the M4 chips.
-
Plasma 6.3.4 Now Available
Although not a major release, Plasma 6.3.4 does fix some bugs and offer a subtle change for the Plasma sidebar.
-
Linux Kernel 6.15 First Release Candidate Now Available
Linux Torvalds has announced that the release candidate for the final release of the Linux 6.15 series is now available.
-
Akamai Will Host kernel.org
The organization dedicated to cloud-based solutions has agreed to host kernel.org to deliver long-term stability for the development team.