Bits, Bytes, & Radio Waves

A quiet journey through discovery and understanding.

  • Amazon Web Services

    Moved to Amazon Web Services (AWS)! Finishing up some military training, then planning on finishing CompTIA Linux+, then starting an AWS training frenzy!!

  • VMware ESXi 6.5 STIG Default File Permissions

    Sorry for the long title, but I wanted it to be descriptive enough to understand and search. So recently, I was testing out the VMware Fling, “DoD Security Technical Implementation Guide(STIG) ESXi VIB” to try to speed up how I secure my hosts. Unfortunately, it changed the default file permissions on my files and I…

  • Introduction to Subnetting 

    Intro to Subnetting by Aaron G. Rombaut Introduction: Subnetting is a way for network administrators to use available network address space without waste. A general rule of thumb in networking is to remember a subnet = broadcast domain = vlan. Discussion: An IPv4  address consists of four octets in dotted decimal notation. Each octet contains…

Notes from practice

I use this site to document systems, configurations, and lessons learned as I work through real problems—both professionally and through personal experimentation. The goal is clarity: understand how something works, explain why it behaves the way it does, and make it reliable and repeatable.

These notes are written primarily for myself, but shared openly in case they help someone else avoid a dead end or reduce frustration. If you’d like to learn more, visit the About page.

If you have questions or comments, you’re always welcome to contact me.

Aaron Rombaut

Technologist & Writer