<?xml version="1.0" encoding="UTF-8"?><rss version="2.0"><channel><title>reiderer · Blog (EN)</title><description>Juan Rodríguez Castellano&apos;s log: systems, cloud and cybersecurity.</description><link>https://reiderer.dev/</link><language>en</language><item><title>Automating the repetitive stuff: my PowerShell module for Microsoft 365</title><link>https://reiderer.dev/en/blog/automate-m365-powershell/</link><guid isPermaLink="true">https://reiderer.dev/en/blog/automate-m365-powershell/</guid><description>I got tired of onboarding and offboarding users by hand during a Microsoft 365 migration, so I built a PowerShell module. Here is what I learned along the way.</description><pubDate>Wed, 17 Jun 2026 00:00:00 GMT</pubDate></item><item><title>Case study: building a SOC with Microsoft Sentinel</title><link>https://reiderer.dev/en/blog/microsoft-sentinel-lab/</link><guid isPermaLink="true">https://reiderer.dev/en/blog/microsoft-sentinel-lab/</guid><description>A Microsoft Sentinel lab in Azure from end to end: identity threat detection with KQL, MITRE ATT&amp;CK mapping and automated response with Logic Apps.</description><pubDate>Tue, 09 Jun 2026 00:00:00 GMT</pubDate></item><item><title>QubesOS: is it really the most secure operating system?</title><link>https://reiderer.dev/en/blog/qubes-os-most-secure-os/</link><guid isPermaLink="true">https://reiderer.dev/en/blog/qubes-os-most-secure-os/</guid><description>What makes QubesOS different, why Snowden uses it, and what &quot;the most secure OS&quot; really means.</description><pubDate>Tue, 09 Jun 2026 00:00:00 GMT</pubDate></item><item><title>From VirtualBox to Proxmox: what they don&apos;t teach you in school</title><link>https://reiderer.dev/en/blog/virtualization-from-virtualbox-to-proxmox/</link><guid isPermaLink="true">https://reiderer.dev/en/blog/virtualization-from-virtualbox-to-proxmox/</guid><description>In class I virtualized with VirtualBox and VMware. Out in the real world I found Proxmox everywhere. Here is what I learned about the difference.</description><pubDate>Mon, 08 Jun 2026 00:00:00 GMT</pubDate></item><item><title>One year in cybersecurity: telling signal from noise</title><link>https://reiderer.dev/en/blog/one-year-of-cybersecurity/</link><guid isPermaLink="true">https://reiderer.dev/en/blog/one-year-of-cybersecurity/</guid><description>A year ago I didn’t know what a SIEM was. A look back at the road and the lesson I value most.</description><pubDate>Wed, 20 May 2026 00:00:00 GMT</pubDate></item></channel></rss>