18 July 2026

First Steps in Cyber Security

A short introduction to the fundamental concepts, methods and things to watch out for beginners of penetration testing.

Cyber security means protecting a system or network against unauthorized access, attack or damage. For anyone starting out in this field, the most important first step is building a solid understanding of core networking and operating system concepts.

Why Fundamentals Matter

A penetration tester first needs to understand how a system normally behaves in order to spot abnormal or insecure behavior. Protocols like TCP/IP, DNS, HTTP, and comfort with the Linux command line are the first stepping stones on this path.

Method: Recon, Analysis, Reporting

A professional penetration test typically follows three phases: gathering information about the target system (reconnaissance), analyzing the vulnerabilities found, and finally communicating the findings in a clear report. Each phase needs to correctly feed the next.

What to Watch Out For

Testing a system without authorization is illegal. While learning, always use environments you have explicit permission for — your own lab setups, CTF platforms. This is both a legal and an ethical requirement.

This is the first post in the series. Future posts will go deeper into specific topics and practical examples.