How Hackers Scan Your Network — And You Don't Even Know

They're Scanning Your Network Right Now

The internet is constantly being scanned. Shodan, Censys, and thousands of bots scan every IP address on the planet every day.

How Network Scanning Works

1. Host Discovery: Find which IPs are alive
2. Port Scanning: Find open services
3. Service Enumeration: Identify software versions
4. Vulnerability Matching: Compare against CVE databases
5. Exploitation: Attack identified vulnerabilities

What Shodan Sees

Shodan.io indexes every device connected to the internet. Search results include:

• 🏠 Home security cameras with default passwords
• 🏭 Industrial control systems (SCADA) exposed online
• 🏥 Hospital equipment accessible from internet
• 🔓 MongoDB databases without authentication
• 🖨️ Printers with open admin panels

Your Home Network Right Now

Run this on your own network and be shocked:

nmap -sV -p 1-10000 your_router_ip
nmap -sn 192.168.1.0/24 | grep "scan report"

Most people find 10-30 devices they didn't know were connected!

How to Protect Yourself

• 🔒 Disable UPnP on your router
• 🔒 Close unnecessary ports
• 🔒 Update all device firmware
• 🔒 Use network segmentation
• 🔒 Monitor with IDS (Snort/Suricata)

🔥 Learn network defense at Code Hacker →