breakfixlearn - network lab notes & security news https://breakfixlearn.com/ CCNA lab walkthroughs, plain-language security news breakdowns, and Python network automation notes. en Sat, 05 Sep 2026 09:00:00 -0700 Building an IT Runbook That Would Actually Survive Contact With a Real Service Desk https://breakfixlearn.com/blog/it-runbook-sops-real-service-desk.html https://breakfixlearn.com/blog/it-runbook-sops-real-service-desk.html Sat, 05 Sep 2026 09:00:00 -0700 SUPPORT A five-document IT runbook covering onboarding, offboarding, password reset, laptop setup, and network troubleshooting, built from NIST, CIS Controls v8, and Microsoft's own documentation, including the lockout threshold assumption that turned out backwards. I Kept Getting VLSM Wrong By Hand, So I Wrote a Tool That Can't https://breakfixlearn.com/blog/vlsm-subnet-calculator-python-tool.html https://breakfixlearn.com/blog/vlsm-subnet-calculator-python-tool.html Fri, 04 Sep 2026 09:00:00 -0700 NETWORK A dependency-free Python CLI that plans VLSM subnetting from a CSV of departments and host counts, no manual bookkeeping, 30 tests, and the allocation-order decision that stops wasted address space. I Ran a Real Security Audit Against My Own Linux Machine, Here Is What Actually Broke https://breakfixlearn.com/blog/linux-hardening-audit-lynis-rkhunter.html https://breakfixlearn.com/blog/linux-hardening-audit-lynis-rkhunter.html Thu, 03 Sep 2026 09:00:00 -0700 SEC Lynis and rkhunter against a real Ubuntu workstation: three warnings triaged, a crashed Fail2ban jail caught, and an honest account of the thirty eight suggestions I skipped. I Built a Vulnerability Management Program From Scratch, Policy to Remediation https://breakfixlearn.com/blog/vulnerability-management-program-tenable-powershell-bash.html https://breakfixlearn.com/blog/vulnerability-management-program-tenable-powershell-bash.html Thu, 27 Aug 2026 09:00:00 -0700 SEC Policy, stakeholder buy-in, Tenable scanning across Windows and Linux targets, and ten confirmed remediations in PowerShell and Bash, including the two attempts that didn't work out. I Automated the Seven Microsoft 365 Admin Tasks That Actually Fill an IT Ticket Queue https://breakfixlearn.com/blog/automate-microsoft-365-admin-tasks-powershell-graph.html https://breakfixlearn.com/blog/automate-microsoft-365-admin-tasks-powershell-graph.html Mon, 24 Aug 2026 10:00:00 -0700 SUPPORT Onboarding, offboarding, groups, delegated admin roles, mail flow, and service health, automated with the Microsoft Graph PowerShell SDK, with a real audit trail. Free Microsoft 365 Sandbox: The Real Setup Guide (2026) https://breakfixlearn.com/blog/free-microsoft-365-sandbox-real-setup-guide.html https://breakfixlearn.com/blog/free-microsoft-365-sandbox-real-setup-guide.html Sun, 23 Aug 2026 09:00:00 -0700 SUPPORT The Microsoft 365 developer sandbox isn't actually free for individuals. Here's the real accessible path (30-day E3 trial) and how to avoid getting billed.