Penetration Testing Methodology
Part of the Cybersecurity Roadmap
In short
A real pentest is not random poking. It follows the same calm, written process every time, with permission first, so the work is thorough, repeatable and safe for everyone.
A structured process — reconnaissance, scanning, exploitation, post-exploitation, reporting — ensuring a pentest is thorough and repeatable rather than random poking, and always conducted with explicit written authorization.
Think of it like this
The building safety inspector
A licensed safety inspector does not sneak in and break things. They are hired, agree a scope, check the building against a checklist, then hand over a report of weak spots to fix. An authorised pentester works exactly the same way.
Watch it happen
The phases of an authorised test
1/5Agree written permission, targets and rules of engagement before touching anything.
The big ideas
What you need to know
Permission comes first
No written authorisation, no test. Testing a system you do not own or control is illegal, full stop.
A repeatable process
Following set phases means two testers cover the same ground and nothing important is skipped.
Rules of engagement
The scope says what is in bounds, when to test, and what never to touch, like production payments.
The report is the point
Clients pay for clear, prioritised findings and fixes, not for a list of clever tricks.
Save yourself the pain
Common mistakes
Oops
Starting to test the moment you spot an interesting target.
Do this instead
Get written permission and agree scope first. Acting without it is a crime, however good your intent.
Oops
Treating the report as an afterthought.
Do this instead
The report is the deliverable. Findings nobody can understand or act on give the client no value.
Your mission
Write a rules of engagement document
Quick check
What must happen before any penetration testing begins?
Go deeper
- 1Learn the standard phases of a penetration test in order.
- 2Read a public penetration testing methodology document (e.g. PTES) for more depth.
- 3Understand why written authorization ('rules of engagement') must exist before any testing begins.
More topics at this stop
Reconnaissance & OSINT
Scanning & Enumeration (Nmap)
Exploitation Basics
Metasploit Framework
Burp Suite Fundamentals
Privilege Escalation
Post-Exploitation Basics
Password Attacks & Cracking
Wireless Security Testing (Overview)
Report Writing for Pentests
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