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Zer-security — Cybersecurity Portfolio

Aspiring Cybersecurity Professional focused on networking, Linux, web fundamentals, and practical security learning. This repository contains my portfolio website, learning notes, and selected cybersecurity projects.

Portfolio GitHub TryHackMe Hack The Box


About

I am learning cybersecurity through structured study, hands-on practice, and technical documentation. I use Kali Linux to develop my understanding of operating systems, networking, and security tools.

My approach emphasizes understanding commands, checking results, and documenting what has and has not been verified. Skills and project status should reflect actual evidence rather than assumed completion.

Current Learning Areas

Area Focus
Networking TCP/IP, subnetting, OSI model, and network fundamentals
Linux Command line, files, directories, permissions, and system administration basics
Web fundamentals HTTP, URLs, web technologies, and security concepts
Security tools Learning how to use and interpret security-tool output responsibly
Cybersecurity practice Structured learning, lab exercises, and technical write-ups
Python and automation Reading, understanding, and validating scripts

This table describes learning areas, not professional certifications or mastery claims.

Featured Project: Secure MCP Server for Kali Linux

Repository: Zer-security/secure-mcp-server

The project explores a security-focused Model Context Protocol (MCP) server that exposes explicitly registered, read-only tools for a local Kali Linux environment.

Design goals include:

  • Least privilege and an explicit tool allowlist.
  • Scoped authorization and OAuth 2.0 with PKCE.
  • TLS and transport security protections.
  • Request rate limiting and audit logging.
  • Avoiding generic shell or arbitrary-code execution endpoints.

Status: Development and verification are ongoing. The design goals above do not, by themselves, establish production readiness. Refer to the project repository, tests, and current documentation for implementation details and verification status.

Portfolio documentation: MCP-Kali project page

Repositories

  • secure-mcp-server — read-only MCP tools and security controls for Kali Linux.
  • zer-os — custom Linux operating-system project.
  • Linux-Kernel — forked Linux kernel foundation for custom OS development.
  • security-tools — Python utilities for network inspection, DNS/OSINT, web security, and defensive research.
  • portofolio-zer-security — website source code.

Learning Notes and Write-ups

Technical notes are maintained in /notes.

Topic Notes
Linux Fundamentals Part 1 Read the notes
Web Fundamentals Read the notes

These notes document learning and practice. They should not be interpreted as proof of professional experience or authorization to test systems.

Portfolio Website

The portfolio website presents selected projects, skills, write-ups, and other learning information.

Website: https://zer-security.github.io/portofolio-zer-security/

Source repository: https://github.com/Zer-security/portofolio-zer-security

Learning Profiles

Live profile statistics are intentionally not duplicated here because they may change over time. Visit the platforms for their current information.


This repository documents an ongoing cybersecurity learning journey. Project claims and progress should be evaluated against the available source code, documentation, and verification evidence.

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