Software⏱️ 2 min read📅 2026-05-31

How to Fix: How to fix ERR_UNSAFE_PORT error on Chrome when browsing to unsafe ports

ERR_UNSAFE_PORT error on Chrome when browsing to unsafe ports

Quick Answer: Try using the Chrome flag '--allow-unsecure-ports' or add an exception in Chrome's settings to allow access to port 6666.

📋 Table of Contents

  1. 🛑 Root Causes of the Error
  2. 🚀 How to Resolve This Issue
  3. ✨ Wrapping Up

ERR_UNSAFE_PORT is a known error in Google Chrome that occurs when attempting to connect to a web server on an unsafe port. An unsafe port is typically one that is not within the standard range of ports (0-65535) and is often used by malicious websites or servers.

🛑 Root Causes of the Error

  • Using a port number outside the standard range (0-65535)

🚀 How to Resolve This Issue

Method 1: Using a Port Forwarding Rule

  1. Step 1: Open your router's configuration page and navigate to the port forwarding section.

Method 2: Using a Third-Party Port Scanner

  1. Step 1: Use a third-party port scanner to scan for open ports on your network.

✨ Wrapping Up

By following these steps, you should be able to resolve the ERR_UNSAFE_PORT error and connect to your web server on port 6666.

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