Setting Up and Securing a VOIP Server
Hey there! I’ve been learning VOIP from a system administrator’s angle rather than a developer’s: not “how do I build a calling app,” but “how do I stand up and secure a real PBX the way an org ac...
Muhammad Abdul Rahman
Hi, I’m Muhammad
Building and securing
infrastructure that actually runs.
MSc IT student focused on Linux systems, cloud infrastructure, DevOps, DevSecOps, and cyber defence, documenting what I build and break on my own self-hosted server as I go.
Featured Work
Secure VOIP Server (Asterisk)
A self-hosted Asterisk PBX with encryption enforced end-to-end: TLS-only SIP signalling and mandatory SRTP call audio, reachable only over my private WireGuard VPN.
Read the write-upVoipPhone: Custom SIP Client
A native iOS calling app with CallKit and PushKit, backed by my own TypeScript push-notification service for a self-hosted PBX.
View ProjectRead Smart: Student Management System
A full-stack student records system with role-based dashboards (admin/teacher/student), deployed and running on my own Ubuntu server.
Live DemoLatest Writing
Getting Hands-On with Networking Tools
Hey there! Networking is one of those subjects that stays abstract until you actually break something and have to figure out why packets aren’t going where you expect. This year I moved from “I kn...
Linux Commands and Tools I Rely On
Hey there! I already put together a command line tutorial based on @recluze’s playlist for people getting started. This post is different: it’s the shortlist of commands and tools I actually reach...
Learning Web and App Development
Hey there! Before I leaned into Linux, cloud, and security, most of my hands-on development experience came from building actual applications: mobile and web. That foundation still shapes how I ap...
Using AWS EC2 and Other Cloud Tools
Hey there! Alongside self-hosting on OVH, I’ve been getting properly comfortable with AWS: enough to pass the AWS Cloud Practitioner certification (via KodeKloud) and start planning cloud infrastr...
Setting Up and Managing My Own Servers
Hey there! A big chunk of what I’ve learned this year didn’t come from a course: it came from breaking and fixing my own Ubuntu server on OVH, over and over, until it stopped breaking. What’s a...
Learning and Implementing the PyData Stack
Hey there! Python has been part of my toolkit for a while, but this year I actually sat down and learned the PyData stack properly: NumPy, pandas, and the surrounding tooling that turns raw data i...
Solving the MIT Missing Semester Exercises
Hey there! I recently worked through MIT’s Missing Semester of Your CS Education: a course built around a simple idea: universities teach you algorithms and data structures, but rarely teach you t...
Mastering Linux Command Line: Tutorial
Linux Command Line playlist by sir @recluze is a excellent crash course for beginners. It goes straight into the essential terminal commands and common Linux tasks. This is a structured guide based...
Code Complete: Book for making the code complete
When I started programming, to be very honest I just wanted to make things run. A green checkmark, no errors: that was success. But as I grew, I realized: working code is only the beginning. Readi...