Bits, Bytes, & Radio Waves

A quiet journey through discovery and understanding.

  • VMware, Synology, iSCSI, and Multipath I/O (MPIO)

    Prerequisites Here is a good article from VMware docs that explains this. https://docs.vmware.com/en/VMware-vSphere/7.0/com.vmware.vsphere.storage.doc/GUID-DD2FFAA7-796E-414C-84CE-1FCC14474D5B.html The Gist There is more than one physical adapter connected on separate subnets. Each subnet provides a path to the iSCSI target. How I configured the ESXi host with the vSphere Client I created two VMkernel adapters, one for iSCSI-A and one…

  • OpenSSL Commands

    Prerequisites Access a Computer with OpenSSL Copy the file(s) to a system that has OpenSSL. If you are on a Windows machine, the easiest way to do this is to use Git for Windows (https://git-scm.com/download/win). Once installed, you can run Git Bash and will have access to OpenSSL. Linux and macOS will likely already have…

  • Ports, Protocols, and Services (PPS)

    Introduction This is my attempt to keep track of various ports, protocols, and services for successful deployments of solutions. Active Directory Port Number TCP/UDP IANA Service Name IANA Description Common Use 135 TCP epmap DCE endpoint resolution RPC Endpoint Mapper 389 TCP/UDP ldap Lightweight Directory Access Protocol LDAP 636 TCP ldaps ldap protocol over TLS/SSL…

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