The Curious Engineer

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Christian Hascheks blog

blog.haschek.at

Personal Blog of Christian Haschek

Linux / UnixSecurityEmbedded / microcontrollersNetworking

’15’20’25
Posts
66 from 30 Dec 2014 to 23 Jul 2026
Posting
now and then (2 in the last year)
Kind
personal blog
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https://blog.haschek.at/rss.xml

2026 1

  1. You should self-host your mail server - maybe even at home - because spam is a solved problem

2025 1

  1. 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

2024 1

  1. Sending Emails to my 3-year-old - How I'm using email and timecapsules as a fun legacy for my son to find

2023 3

  1. Let's Encrypt wildcard certificates - the easy way - Using DNS standalone - No credentials needed and working with every DNS provider
  2. SSH based comment system - because input fields are too easy
  3. ZFS over iSCSI storage in Proxmox - all the power of ZFS without needing large disks in your nodes

2021 3

  1. Simple Raspberry Pi powered SMS Gateway - make your projects send SMS with a simple REST API
  2. Build your own datacenter with PXE and Alpine - Who needs docker when you can run old laptops as blade servers
  3. How I heat my home by mining crypto currencies - and cutting my electricity bill in half in the process

2020 4

  1. The perfect file server - Use all your disks for storage by booting a USB RAM disk
  2. Stopping phishing campaigns with bash - how to poison phishing sites with fake data
  3. The encrypted homelab - creating the most secure homelab there is
  4. The A1 Telekom Austria Hack - they came in through the web shells

2019 6

  1. App controlled garden irrigation system for less than 20 Bucks - put those Raspberry Pis you have laying around to a good use
  2. Threat vector: Legacy static websites - Surely old HTTP-only sites can't be vulnerable if not updated for 5 years, right?
  3. I scanned the whole country of Austria and this is what I've found - IP cameras, printers, industrial controls to name a few..
  4. 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
  5. Sort by views
  6. Teaching in minecraft - logic gates have never looked so good

2018 6

  1. Making a smart meter out of a dumb one for 4 $ - and displaying it on an awesome dashboard
  2. So you have been scammed - a small guide on how to strike back and be a bad scamee
  3. How to fight child pornography with a Raspberry Pi and deep learning - Finding illegal content with just 10 Watts of power
  4. Reverse engineering your mobile banking app - to make a PHP script that automates checking your balances
  5. Raspberry Pi + Deep Learning home security system - From start to finish
  6. Raspberry Pi controlled cactus lamp - adding power to a cheap lamp

2017 10

  1. Teaching your fish tank LEDs new tricks - for just a few bucks and you can even make some virtual clouds
  2. API Heaven ICO - finally an ICO for an existing product
  3. Making an awesome dashboard for your crypto currencies in 3 steps - using InfluxDB, Grafana and PHP
  4. How to defend your website with ZIP bombs - the good old methods still work today
  5. Creating the safest ETH paper wallet with a Raspberry Pi - with a printer and without an internet connection
  6. Accepting Ethereum payments without external services - You don't need to pay for merchant systems
  7. DIY vertical hydroponic system - grow vegetables in small spaces
  8. Making a simple Raspberry Pi Bitcoin/Ethereum trading bot - with rocket.chat and Slack status reporting
  9. Is Guetzli useful in production? - It's much better than google promised - 51% smaller images
  10. My door sends me chat messages - Raspberry Pi powered door sensor and Rocket.Chat bot with some neat info

2016 12

  1. Finding bombs in the forest - treasure hunters make it easy to find them
  2. 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
  3. Forget Pay2Win - the time has come for Learn2Win - how to reward players in any game for academic achievements
  4. Why hackits are the first thing I teach new classes - they represent everything I love about computer science
  5. My door sends me emails - Simple and cheap Raspberry Pi burglar alarm
  6. HTML5 heat spreading simulation - with a simple JS algorithm
  7. DIY cloud lamp for fun and profit - ok, just for fun.. no profit involved
  8. DIY hydroponic pot for ~36€ - Easy to build and awesome for your plants
  9. Letting students mod school computers - with some amazing results
  10. How to visualize RADIUS connections - by parsing Windows Server log files
  11. My company just turned 10 and it was quite a ride - also: about the time Thomas Schranz and I almost invented Dropbox
  12. IKEA Server Rack - nope, not a lack rack

2015 18

  1. Raspberry Pi controlled power sockets - it's as easy as it sounds
  2. Chromebooks for Work & Classrooms - are they worth it?
  3. That (not so) awesome time the police raided my home - lesson learned: Don't click on links random people send you
  4. Water cooled NAS made from spare parts - with Macguyverish solutions for common problems
  5. DIY: Cheap wall mounted, water cooled PC for 51$ - with LED backlight and and all the good stuff
  6. Let's analyze over twenty thousand proxies - It won't get much better
  7. Analyzing 443 free proxies - Only 21% are not shady - what about the other 79%?
  8. Why are free proxies free? - because it's an easy way to infect thousands of users and collect their data
  9. Raspberry Pi temperature monitor - with a nice graph and live updates
  10. What would happen if you'd embed a remote JPEG with a HTTP link but the remote server is forcing HTTPS? -
  11. Neue Reifeprüfung analyzed - The simple way to get a good grade
  12. Repairing a closed loop CPU water cooler with aquarium tubing - air bubbles... those f***ing air bubbles
  13. Raspberry Pi 2 wireless temperature box - The π² + wifi + 1wire sensor = pure awesomeness
  14. hackthissite.org ascii code picture challenge -
  15. Announcing: Socialcube LITE - My proof-of-concept evolved to a intuitive platform which is free for every educational institution
  16. PHP script that filters moods from twitter - ..how depressed is the web?
  17. Temperature visualization - from 6 months of data
  18. Raspberry Pi controlled LEDs - to visualize the up-state of my servers

2014 1

  1. My XP-based grading system - a modern approach to grading in the year 2014