#security

Introduction

FirewallD is a dynamic firewall manager for Linux systems, providing a flexible way to manage firewall rules. This guide shows you how to install and configure FirewallD on CentOS.

Step-by-step Guide

1. Update your package list
   • sudo yum update

Introduction

Securing your website with SSL is essential for protecting data and improving trust. This guide shows you how to set up SSL for Apache on your Ubuntu VPS using a free Let's Encrypt certificate.

Step-by-step Guide

1. Update your package list
   • sudo apt update

Introduction

Setting up a VPN server on your VPS helps secure your internet traffic and access resources remotely. This guide explains how to install and configure OpenVPN on Ubuntu.

Step-by-step Guide

1. Update your package list
   • sudo apt update

Introduction

SFTP (SSH File Transfer Protocol) is a secure way to transfer files to and from your server. This guide shows you how to enable and use SFTP on your Linux VPS.

Step-by-step Guide

1. Ensure OpenSSH is installed and running
   • sudo apt update
   • sudo apt install openssh-server

Introduction

Step-by-step Guide

Introduction:
Enabling the firewall in Ubuntu with UFW (Uncomplicated Firewall) is a simple way to protect your server from unwanted access.

Step-by-step Guide:

1. Install UFW (if not already installed):n
   • sudo apt update
   • sudo apt install ufw

Recommendations:

Introduction:
Changing the default SSH port in Linux is a simple way to improve your server’s security and reduce brute-force attacks.

Step-by-step Guide

1. Open the SSH configuration file:
   • sudo nano /etc/ssh/sshd_config
   • Find the line:n
     • #Port 22

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Introduction:
Lost your FreeBSD root password? Here’s how to reset it quickly.

Step-by-step Guide:

1. Reboot your server.
2. At the boot menu, choose “Single User Mode”.

Recommendations:

• Use a strong password.
• Consider enabling sudo for regular users.

Introduction:
Forgot your Linux password? Don’t worry! Here’s a quick way to reset it using single-user mode.

Step-by-step Guide:

1. Reboot your server.
2. At the GRUB menu, select your Linux entry and press e to edit.

Recommendations:

• Use a strong password.