Christian Haschek's Blog

@christian_hascheks_blog@robot.villas

Christian Haschek's projects and tutorials on cybersecurity, self-hosting, Raspberry Pi, programming, infrastructure, and teaching.

Source: https://blog.haschek.at/rss.xml

Homepage: https://blog.haschek.at

Posts

65

Posts

You should self-host your mail server - maybe even at home - because spam is a solved problem #SelfHosting #Email #Cybersecurity
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Jul 23, 2026
The ultimate Raspberry Pi gitops cluster - Booting and auto provisioning a Docker Swarm cluster with PXE and enjoying zero-downtime deployments from a single git repository #RaspberryPi #DevOps #SelfHosting
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Nov 6, 2025
Sending Emails to my 3-year-old - How I'm using email and timecapsules as a fun legacy for my son to find #Legacy #Parenting #Digital
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May 5, 2024
Let's Encrypt wildcard certificates - the easy way - Using DNS standalone - No credentials needed and working with every DNS provider #Security #LetsEncrypt #DNS
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Oct 1, 2023
SSH based comment system - because input fields are too easy #Cybersecurity #OpenSource #DevTools
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Jul 28, 2023
ZFS over iSCSI storage in Proxmox - all the power of ZFS without needing large disks in your nodes #Proxmox #ZFS #iSCSI
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Jul 4, 2023
Simple Raspberry Pi powered SMS Gateway - make your projects send SMS with a simple REST API #RaspberryPi #IoT #APIs
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Dec 6, 2021
Build your own datacenter with PXE and Alpine - Who needs docker when you can run old laptops as blade servers #SelfHosting #Servers #Linux
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Jun 15, 2021
How I heat my home by mining crypto currencies - and cutting my electricity bill in half in the process #CryptoMining #HomeAutomation #EnergySaving
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Feb 23, 2021
The perfect file server - Use all your disks for storage by booting a USB RAM disk #Tech #SelfHosting #Storage
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Oct 31, 2020
Stopping phishing campaigns with bash - how to poison phishing sites with fake data #Cybersecurity #Bash #Phishing
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Aug 13, 2020
The encrypted homelab - creating the most secure homelab there is #Homelab #Security #Tech
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Jun 17, 2020
The A1 Telekom Austria Hack - they came in through the web shells #Cybersecurity #Hacking #WebSecurity
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Jun 8, 2020
App controlled garden irrigation system for less than 20 Bucks - put those Raspberry Pis you have laying around to a good use #DIY #RaspberryPi #IoT
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Jun 16, 2019
Threat vector: Legacy static websites - Surely old HTTP-only sites can't be vulnerable if not updated for 5 years, right? #Cybersecurity #WebSecurity #LegacySystems
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Feb 24, 2019
I scanned the whole country of Austria and this is what I've found - IP cameras, printers, industrial controls to name a few.. #Cybersecurity #Scans #Austria
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Feb 8, 2019
The curious case of the Raspberry Pi in the network closet - how we found, analyzed (with the help of Reddit) and in the end caught the culprit of a malicious device in our network #Cybersecurity #RaspberryPi #NetworkSecurity
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Jan 16, 2019
Teaching in minecraft - logic gates have never looked so good #Education #Gaming #Minecraft
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Jan 10, 2019
Making a smart meter out of a dumb one for 4 $ - and displaying it on an awesome dashboard #DIY #IoT #HomeAutomation
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Oct 19, 2018
So you have been scammed - a small guide on how to strike back and be a bad scamee #Cybersecurity #Scam #SelfDefense
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Aug 31, 2018
How to fight child pornography with a Raspberry Pi and deep learning - Finding illegal content with just 10 Watts of power #AI #RaspberryPi #Cybersecurity
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Jun 17, 2018
Reverse engineering your mobile banking app - to make a PHP script that automates checking your balances #Cybersecurity #ReverseEngineering #MobileSecurity
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Apr 5, 2018
Raspberry Pi + Deep Learning home security system - From start to finish #RaspberryPi #DeepLearning #Security
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Mar 27, 2018
Raspberry Pi controlled cactus lamp - adding power to a cheap lamp #RaspberryPi #DIY #IoT
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Jan 3, 2018
Teaching your fish tank LEDs new tricks - for just a few bucks and you can even make some virtual clouds #DIY #HomeAutomation #Aquarium
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Sep 9, 2017
API Heaven ICO - finally an ICO for an existing product #Tech #Finance #Dev
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Aug 16, 2017
Making an awesome dashboard for your crypto currencies in 3 steps - using InfluxDB, Grafana and PHP #DataVisualization #Monitoring #HomeLab
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Aug 3, 2017
How to defend your website with ZIP bombs - the good old methods still work today #Cybersecurity #WebSecurity #Hacking
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Jul 5, 2017
Creating the safest ETH paper wallet with a Raspberry Pi - with a printer and without an internet connection #Crypto #Security #RaspberryPi
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Jun 22, 2017
Accepting Ethereum payments without external services - You don't need to pay for merchant systems #Ethereum #Crypto #SelfHost
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Jun 9, 2017
DIY vertical hydroponic system - grow vegetables in small spaces #DIY #Gardening #HomeTech
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Apr 23, 2017
Making a simple Raspberry Pi Bitcoin/Ethereum trading bot - with rocket.chat and Slack status reporting #RaspberryPi #Crypto #Bots
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Apr 17, 2017
Is Guetzli useful in production? - It's much better than google promised - 51% smaller images #ImageCompression #WebPerformance #Guetzli
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Mar 24, 2017
My door sends me chat messages - Raspberry Pi powered door sensor and Rocket.Chat bot with some neat info #RaspberryPi #IoT #HomeAutomation
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Jan 23, 2017
Finding bombs in the forest - treasure hunters make it easy to find them #Security #History #Explosives
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Oct 26, 2016
How a scammer stole 500$ from me and in the end begged me not to tell his parents - Thank god not all scammers are professionals #CyberSecurity #Scam #PersonalStory
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Sep 27, 2016
Forget Pay2Win - the time has come for Learn2Win - how to reward players in any game for academic achievements #Gaming #Education #Inspiration
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Jun 5, 2016
Why hackits are the first thing I teach new classes - they represent everything I love about computer science #Education #ComputerScience #Cybersecurity
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Jun 1, 2016
My door sends me emails - Simple and cheap Raspberry Pi burglar alarm #RaspberryPi #HomeAutomation #DIY
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Apr 27, 2016
HTML5 heat spreading simulation - with a simple JS algorithm #WebDev #JavaScript #Simulation
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Feb 24, 2016