HAOS Zigbee Tasmota Migration
Question I have an old installation of homeassistant in a VM paired with IOTstack in another VM.It is no longer possible to upgrade this setup because it is too many versions behind. I have created a new VM with HAOS…
Manfred Bartz
MTU Mismatches and PMTUD Black Holes
The Silent Killer of Network Connectivity: MTU Mismatches and PMTUD Black Holes Ever found yourself in a networking nightmare where pings work perfectly, but then SSH sessions hang mysteriously, or large file transfers just die? You’ve checked your firewalls, verified…
Visual Scams and How to Outsmart Them
QR Codes, CAPTCHAs, and Screenshots: The Visual Side of Scams 📝 Introduction Today we explore a lesser-known side of digital trickery: image-based scams. From innocent-looking QR codes to fake CAPTCHAs and doctored screenshots, scammers are using visuals to bypass filters…
Asymmetric Routing and Reverse Path Filtering (RPF)
Reverse Path Filtering (RPF): Linux and many other OSes/routers implements a security feature called Reverse Path Filtering (RPF), often controlled by rp_filter sysctl parameter (e.g., /proc/sys/net/ipv4/conf/all/rp_filter). Purpose: RPF prevents IP spoofing and helps mitigate certain types of attacks. It works…
🖥️ Moving a Debian 12 VM to a Physical Machine via USB (V2P Guide)
If you’ve configured a Debian 12 system in virt-manager and want to install it on real hardware, this guide shows how to transfer the VM image to a USB stick and boot it on a physical machine. 🔧 Step 1:…
🔐 Password Managers – A Safer, Simpler Way to Handle Your Logins
Do you keep your passwords in a notebook? On scraps of paper near the computer? You’re not alone. Many people, especially those of us who didn’t grow up with the internet, find passwords hard to manage. Every website wants a…
🔐Password Managers & VPNs
🔎 Disclaimer The author has personal experience with 1Password, corporate VPNs, PureVPN, and limited experience with Bitwarden.The information provided is for general awareness and comparison purposes only and does not constitute an endorsement of any particular product or service.Readers are…
Web Servers Implementation
This is a structured visual and text-based overview of my IPv4 + IPv6 dual-stack web architecture with HAProxy and self-contained certs. 🌐 Final Architecture Diagram (Text-based) 📄 Structured Description 🧩 Components Role Name Addressing Reverse Proxy haproxy IPv4: 192.168.20.17, IPv6:…
Home Lab Plans
1. Dedicated Proxmox cluster network (“corosync link”) ✅ Benefits: This is highly recommended once a cluster gets beyond hobby size. 2. Storage replication traffic isolation ✅ Benefits: 3. LACP Bonding for node resilience ✅ Benefit: Proxmox will survive NIC failure…
🎯 Master Your Browser: How to Easily Separate Work, Personal, and More with Profiles
Managing multiple online identities (personal, work, volunteer roles) can quickly become messy.Using browser profiles is a simple and powerful way to keep everything separate, clean, and secure. Here’s how to set up a second (or third!) profile in Chrome, Edge,…