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Build Your Own DNS Resolver with Unbound: Master Privacy and Boost Linux Network Speed

By admin May 8, 2026

Stop ISPs and tech giants from snooping on your browsing history. This guide helps you build a private Unbound DNS Resolver, slashing latency from 150ms to <1ms while ensuring absolute security.

Ubuntu

Install and Configure AdGuard Home on Ubuntu to Block Ads and Secure DNS for Your Entire Local Network

By admin April 25, 2026

AdGuard Home is a DNS sinkhole you install on Ubuntu to block ads and tracking for every device on your LAN — including Smart TVs and IoT devices. This guide walks through each step: freeing port 53, installing the binary, configuring upstream DoH, adding blocklists, and pointing your router's DNS to AdGuard Home.

Network

Linux Security: Implementing DoH and DoT to ‘Stay Hidden’ from ISPs

By admin April 12, 2026

Don't let ISPs know what you're accessing. A detailed guide on encrypting DNS with DoT and DoH on Linux for total privacy protection.

Virtualization

Configuring Virtual Firewall and Routing with OPNsense/pfSense in KVM/Proxmox: Building a Secure Virtual Network System

By admin March 24, 2026

Don't let 2 AM network alerts wake you up anymore! Learn how to deploy OPNsense or pfSense as a virtual firewall and router in a KVM/Proxmox environment to enhance security, segment networks effectively, and gain detailed control over data flow for your virtual machines.

Security

Installing and Configuring CrowdSec on Ubuntu: A New Generation Community Server Protection Solution

By admin March 19, 2026

Protecting servers from cyberattacks is a top priority. CrowdSec offers a novel, community-based approach to detect and prevent threats. This article guides you through installing and configuring CrowdSec on Ubuntu.

Network

Guide to Configuring SSH Tunnel: Local, Remote, and Dynamic Port Forwarding

By admin March 13, 2026

SSH Tunneling is not just a convenient tool, but also a powerful solution for flexible network security and access. Learn how to configure Local, Remote, and Dynamic Port Forwarding to overcome network limitations, protect data, and optimize daily tasks.

Ubuntu

Installing and Configuring Squid Proxy Server on Ubuntu: Effective Internet Access Control

By admin March 11, 2026

In an enterprise environment, internet access control is essential. This article shares practical experience on installing and configuring Squid Proxy on Ubuntu. This solution helps you manage bandwidth, block unwanted websites, and enhance network security, based on the success of the DevOps team.

Network

How to Use nmap for Network Scanning and Linux Server Security Auditing

By admin March 6, 2026

A practical guide to using nmap for port scanning, service detection, and Linux server security auditing — drawn from real infrastructure management experience. Covers basic commands, NSE scripts, and an automation script for weekly audits.