Firewalls filter traffic based on ports, protocols, and IPs.
Free techniques:
Free tool: nmap, proxychains
Most corporate firewalls allow HTTP (port 80) and DNS (port 53). Why? Because without web traffic, the internet is useless. Without DNS, nobody can find Google. Firewalls filter traffic based on ports, protocols, and IPs
The Concept: Wrap your attack traffic inside a legal protocol. If the firewall sees "malicious payload" – it blocks. If it sees "GET /index.html" – it lets it through.
The Free Tool: dnscat2 or http-tunnel (Open source).
How it works (Conceptually): Free tool: nmap , proxychains
Ethical Lab Setup: Use VirtualBox (free). Put a "victim" VM behind a restrictive firewall. Use dnscat2 to egress the network via DNS. You will be shocked at how easily this works.
Honeypots are decoys. They mimic vulnerable services (e.g., an open port 22 running a fake SSH server). The goal is to lure attackers away from real assets and study their behavior. Touching a honeypot triggers immediate alarms. Most corporate firewalls allow HTTP (port 80) and
Honeypots are traps. They emulate vulnerable services (like an old SMB share or a SSH server) but are isolated from real data.
How to spot a free honeypot:
The Golden Rule: Never execute a full exploit on a target you suspect is a honeypot. Walk away. The defender is watching you in real-time.