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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
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    • Rolling Linux Distros
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    • Linux Distributions for Students
    • Linux Distros for Windows
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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

How to Make File and Directory Undeletable, Even By Root in Linux

20 Basic ‘ls’ Command Examples in Linux

5 Different Types of Shell Commands and Their Usage in Linux

10 Lesser Known Linux Commands – Part 2

How to Find MySQL, PHP and Apache Configuration Files

How to Delete All Files in a Folder Except Certain Extensions

Linux Server Monitoring Tools

10 Tips On How to Use Wireshark to Analyze Packets in Your Network

screenFetch – An Ultimate System Information Generator for Linux

How to Monitor Ubuntu Performance Using Netdata

Stacer – Linux System Optimizer & Monitoring Tool

CBM – Shows Network Bandwidth in Ubuntu

3 Methods to Check Apache Server Status and Uptime in Linux

Learn Linux Tricks & Tips

YTP-DL: The Easiest Way to Download Songs from YouTube Videos

How to Find Linux Server Geographic Location in Terminal

Rename All Files and Directory Names to Lowercase in Linux

Lolcat – Display Text in Rainbow Colors in Linux Terminal

Ways to Use ‘find’ Command to Search Directories More Efficiently

3 Ways to Find Out Which Process Listening on a Particular Port

Best Linux Tools

21 Best Slack Alternatives for Team Chat [Free & Paid]

13 Free and Open-Source Video Editing Software for Linux in 2024

The 27 Best IDEs and Code Editors for Linux

Top 4 Google Docs Alternatives for Linux in 2024

5 Best Reference Management Software for Linux in 2024

4 Best Tools for Creating Fillable PDF Forms on Linux

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