Fixing Outlook's wrong MAPI address (SCP vs Autodiscover)

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I was recently migrating our Exchange Server when user reports started coming in that Outlook was throwing certificate errors. Here’s a quick write-up on how to fix Outlook using the wrong MAPI [...] Read more

How to Upgrade Your Domain Functional Level (DFL) in Active Directory

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A complete Guide on what DFL even is, to how to upgrade it, and what to do if something goes wrong. If you've been running Active Directory for a while, chances are you're due for a Domain Functional [...] Read more

Expanding your linux VM Disk: Resize LVM partition without creating a new one

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Below is a friendly, step-by-step guide to resizing a Linux VM’s disk without creating a new partition. We’ll walk through extending the last partition on a disk, resizing a Physical Volume (PV), [...] Read more

Limit CPU, Memory, and Other Resources for a Service Using systemd

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Occasionally, you might encounter a service that unexpectedly gobbles up your system's resources. For example, I once set up an SSH honeypot to capture malicious bot activity—but when random bots [...] Read more

OSI Model: 7 Layers of Networking Made Simple

- Posted in Technology Compendium by
Have you ever wondered how your text messages, emails, or even your favorite cat memes magically find their way across the internet from one device to another—or why people keep mentioning the OSI [...] Read more