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Tecmint: Linux Howtos, Tutorials & Guides
  • Learn Linux
  • Linux Distros
    • Linux Distros for Beginners
    • Linux Distros for Experts
    • New Linux Distros
    • Linux Server Distros
    • Secure Linux Distros
    • CentOS Alternatives
    • RedHat Distributions
    • Debian Distributions
    • Ubuntu Distributions
    • Arch Linux Distros
    • Rolling Linux Distros
    • KDE Linux Distros
    • Linux Distros for Old PC
    • Linux Distros for Kids
    • Linux Distributions for Students
    • Linux Distros for Windows
  • Commands
    • A – Z Linux Commands
    • 100+ Linux Commands
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  • Pro Courses
    • Bash Scripting
    • Learn Linux
    • AI for Linux
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    • RHCE Certification
    • LFCS Certification
  • eBooks
    • RHCSA Exam
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    • LFCE Exam
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    • Ansible Exam
  • About
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    • Suggest an Update

Firewalls

Install and Configure Firewalld in CentOS and Ubuntu

How to Install, Configure and Use Firewalld in CentOS and Ubuntu

Firewalld (firewall daemon) is an alternative to the iptables service, for dynamically managing a system’s firewall with support for network

Install and Configure CSF in CentOS and Ubuntu

Install and Configure ConfigServer Security & Firewall (CSF) in Linux

If you look at IT-related job postings anywhere, you will notice a steady demand for security pros. This does not

Setup UFW Firewall on Ubuntu and Debian

How to Setup UFW Firewall on Ubuntu and Debian

A correctly functioning firewall is the most crucial part of the complete Linux system security. By default, Debian and Ubuntu

Fix “firewall-cmd: command not found” Error

How to Fix “firewall-cmd: command not found” Error in RHEL/CentOS 7

firewall-cmd is a command line front-end for firewalld (firewalld daemon), a dynamic firewall management tool with D-Bus interface. It supports

Configure pfBlockerNg for DNS Black Listing in pfSense

Install and Configure pfBlockerNg for DNS Black Listing in pfSense Firewall

In an earlier article the installation of a powerful FreeBSD based firewall solution known as pfSense was discussed. pfSense, as

Install pfSense Firewall

Installation and Configuration of pfSense 2.4.4 Firewall Router

The Internet is a scary place these days. Almost daily, a new zero day, security breach, or ransomware occurs leaving

25 IPtables Firewall Rules for Linux

25 Useful IPtable Firewall Rules Every Linux Administrator Should Know

Managing network traffic is one of the toughest jobs a system administrators has to deal with. He must configure the

Block SSH and FTP Access Using IPtables/FirewallD

How to Block SSH and FTP Access to Specific IP and Network Range in Linux

Typically we all use SSH and FTP services often to access the remote servers and virtual private servers. As a

Linux Firewall Iptables Interview Questions

Nishita Agarwal Shares Her Interview Experience on Linux ‘iptables’ Firewall

Nishita Agarwal, a frequent Tecmint Visitor shared her experience (Question and Answer) with us regarding the job interview she had

Control Network Traffic with FirewallD and Iptables

RHCSA Series: Firewall Essentials and Network Traffic Control Using FirewallD and Iptables – Part 11

In simple words, a firewall is a security system that controls the incoming and outgoing traffic in a network based

Useful Firewalld Rules to Manage Linux Firewall

Useful ‘FirewallD’ Rules to Configure and Manage Firewall in Linux

Firewalld provides a way to configure dynamic firewall rules in Linux that can be applied instantly, without the need of

Setup Failover Load Balancer in PFSense

How to Setup Failover and Load Balancing in PFSense

Failover is a type of backup operational mode in which the operations of a system components such as network are

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Linux Commands and Tools

Gogo – Create Directory “Bookmarking” in Linux

16 Top Command Examples in Linux [Monitor Linux Processes]

10 Lesser Known Linux Commands That Are Super Useful

Ternimal – Show Animated Lifeform in Your Linux Terminal

Linux: Difference Between /dev/tty, /dev/tty0, and /dev/console

10 Practical Examples Using Wildcards to Match Filenames in Linux

Linux Server Monitoring Tools

Linfo – Shows Linux Server Health Status in Real-Time

How to Create a Centralized Log Server with Rsyslog in CentOS/RHEL 7

How to Setup and Manage Log Rotation Using Logrotate in Linux

Swatchdog – Simple Log File Watcher in Real-Time in Linux

Observium: A Complete Network Management and Monitoring System for RHEL/CentOS

systemd-analyze – Find System Boot-up Performance Statistics in Linux

Learn Linux Tricks & Tips

How to Create a New Ext4 File System (Partition) in Linux

How to Find and Sort Files Based on Modification Date and Time in Linux

How to Find MySQL, PHP and Apache Configuration Files

Fd – The Best Alternative to ‘Find’ Command for Quick File Searching

How to Watch TCP and UDP Ports in Real-time

5 Ways to Empty or Delete a Large File Content in Linux

Best Linux Tools

16 Free and Open Source Video Players for Linux in 2024

25 Outstanding Backup Utilities for Linux Systems in 2024

27 Best Tools for VMware Administrators in 2024

8 Useful GUI Email Clients for Linux Desktop

Top 3 Open Source Virtual Data Room (VDR) for Linux

4 Best QR Code Generator Tools for Linux

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