About

A quiet, stubborn practitioner from Sydney.

I close tickets by day and write courses by night. The work I do here is the same work I wish I could have studied five years ago — practical, slow, and unwilling to skip the boring middle.

Sydney, Australia IT Support Specialist Cybersecurity Student
Mizanur Rahman
My story

From breaking my own router to fixing other people's networks.

It started with a Wi-Fi outage in a small flat. I refused to call the ISP. Three hours and one factory reset later, I had broken DNS, fixed it, and decided I never wanted to feel that helpless again. That's the loop I keep returning to — break something safely, learn the names of the parts, then teach the next person.

Today I work helpdesk by day, build labs by night, and publish what I learn on YouTube and through these courses. There's no guru pose here. I'm a year ahead of most of my students, and that's exactly the right distance to teach from.

Timeline
2021

First helpdesk role

Tickets, escalations, and the lesson that documentation beats memory.

2022

Networking certifications

CCNA pathway and a home lab that grew louder than my fridge.

2023

Cybersecurity studies

Started university coursework and shifted focus to blue-team work.

2024

YouTube + courses

Launched @Mizanurtechaus and the first course bundle.

2026

Mizanur.com.au

This site — a small studio for learners who don't want fluff.

Certifications & study

In progress and in the wild.

In progress

CompTIA Security+

The cybersecurity baseline employers actually screen for.

Done

CompTIA Network+

Subnetting, routing, switching and Wi-Fi.

In progress

Cisco CCNA

Routing, switching, security fundamentals.

Study

BSc Cybersecurity

Australian university — 3rd year coursework.

Skills

What I actually use every week.

Helpdesk operations

Ticketing systems (Jira, Zendesk), SLA discipline, escalation paths.

Networking

VLANs, ACLs, DHCP, DNS, Wi-Fi survey, packet capture.

Defensive security

EDR triage, log review, hardening, phishing analysis.

Tooling

Bash, PowerShell, nmap, Wireshark, Burp Suite, Splunk.

Cloud & identity

Microsoft 365, Entra ID, MFA, Conditional Access.

Writing

Runbooks, postmortems, course scripts that respect time.