Test Your Home Network Security

TL;DR

Want to check if your home network is secure? This guide shows you how to test it from the outside, using free tools and simple steps. We’ll cover port scanning, vulnerability checks, and checking your router.

Testing Your Home Network Security

1. Find Your Public IP Address
   • Your public IP address is how the internet sees your home network.
   • Go to a website like WhatIsMyIP or search “what’s my ip” on Google. Note this down; you’ll need it later.
2. Port Scanning

   Port scanning checks which ‘doors’ (ports) are open on your network. Open ports can be vulnerabilities.

   • Use an online port scanner like YouGetSignal Port Scanner.
   • Enter your public IP address and scan common ports.
   • What to look for: Ideally, only ports 80 (HTTP), 443 (HTTPS) should be open if you’re running a web server. Anything else is potentially risky. If port 21 (FTP) or 23 (Telnet) are open, close them immediately in your router settings (see step 5).
3. Vulnerability Scanning

   This checks for known weaknesses in services running on your network.

   • Use a free online vulnerability scanner like Nmap Online Scan (requires some technical knowledge).
   • Enter your public IP address and run a basic scan. Be aware this can take a while.
   • What to look for: The report will highlight potential vulnerabilities. If you see anything critical, investigate further or seek help from someone with cybersecurity expertise.
4. Check Your Router’s Firmware

   Outdated firmware can have security holes.

   • Find your router’s IP address (usually 192.168.1.1 or 192.168.0.1 – check your router’s manual).
   • Open a web browser and enter the router’s IP address. You’ll need your admin username and password (often ‘admin/password’ by default – change this!).
   • Look for a section called “Firmware Update” or similar. Check if there is an update available and install it.
5. Secure Your Router Settings

   Basic security measures to protect your network.

   • Change the default admin username and password: This is crucial!
   • Enable WPA3 encryption: Use a strong, unique password for your Wi-Fi.
   • Disable WPS: WPS can be vulnerable to attacks.
   • Enable the firewall: Most routers have a built-in firewall; make sure it’s turned on.
   • Port Forwarding: Only forward ports if absolutely necessary, and understand the risks involved.
6. Use a Cybersecurity Tool (Optional)

   Consider using a home cybersecurity tool for ongoing monitoring.

   • Bitdefender Box or Norton Core are examples of paid devices that offer network protection and vulnerability scanning.