PortChecker Blog Overview

Browse all articles and tutorials in one overview.

Apr 20, 2026 · 10 min

Firewall Rules That Actually Work: Common Mistakes and Smarter Defaults

Firewall rules best practices aren't just about blocking bad traffic - they're about writing rules precise enough to s… Read more

Apr 14, 2026 · 10 min

NAT Types Explained: Why Your Connection Behaves Differently Behind a Router

Having NAT types explained clearly is the first step toward understanding why your devices sometimes struggle to commu… Read more

Apr 01, 2026 · 7 min

How to Check Open Ports on Linux: Complete Guide 2026

Knowing how to check open ports on Linux is a fundamental skill for anyone managing servers, troubleshooting network i… Read more

Mar 23, 2026 · 8 min

How to Remove Your IP from a Blacklist: Step-by-Step Guide 2026

Discovering that your IP address has landed on a spam blacklist is frustrating, especially when it starts hurting your… Read more

Mar 05, 2026 · 7 min

Complete Guide to Checking Open Ports on Windows 2026

Understanding how to check open ports on Windows is essential for anyone managing network security, troubleshooting co… Read more

Minecraft server setup with router and network connections illustration
Dec 27, 2025 · 6 min

Minecraft Server Port Forwarding: Complete Setup Guide

Setting up a Minecraft server is exciting, but getting your friends to connect can be frustrating without proper minec… Read more

HTTP port 80 troubleshooting guide showing network connections, server diagnostic tools, and port configuration in a digital tech illustration
Dec 18, 2025 · 8 min

Port 80 Check: HTTP Troubleshooting Guide

A port 80 check tells you whether your web server is reachable over HTTP - the protocol that browsers use by default w… Read more