23.1 What Metasploit Is

By Ravindra Bagale Last updated: 27 September 2026

In short: Metasploit Framework is a free, open-source collection of exploits, payloads and tools that fit together.

Metasploit Framework is a free, open-source collection of exploits, payloads and tools that fit together. Instead of writing attack code from scratch, you pick a tested module, set a few options, and run it.

Key words you must know:

Term	Meaning	Everyday picture
Exploit	Code that uses a specific vulnerability	The key that fits one lock
Payload	What runs on the target after the exploit works	What you do once inside
Module	Any single tool in Metasploit (exploit, scanner, etc.)	One tool in the box
Listener / handler	Waits for the target to connect back	You waiting by the phone
Session	Your live connection to a compromised host	The open line
Meterpreter	A powerful in-memory payload with many commands	A remote control inside

Payload types: a bind payload opens a port on the target and you connect to it; a reverse payload makes the target connect back to you (better, because firewalls usually allow outbound). LHOST/LPORT = your Kali machine; RHOSTS/RPORT = the target.

Ravindra Bagale's Tip

Students confuse exploit and payload. A simple rule: exploit = the way in, payload = what to do once you are in. The same exploit can be used with different payloads. Interviewers almost always ask about this difference.

Practice task

In your notes, write one line each for exploit, payload, session and Meterpreter. Then explain in one sentence why a reverse payload usually works when a bind payload is blocked.