2025

Digital and Analogue: The balance that works for me
05 Jun
Add pagefind search to hugo
10 Apr
Book Summaries: January - March 2025
02 Apr
Book Summaries: October - December 2024
16 Jan

2024

My 2024 review
19 Dec
Mastering Golang Debugging in Emacs
28 Nov
Book summaries: May - September 2024
16 Oct
Bye Bye Cashlink!
11 Jul
Book summaries: January - April 2024
05 May
From Doom to Vanilla Emacs
22 Feb
My 2023 review
02 Jan

2023

Documentation as Code for Cloud - C4 Model & Structurizr
02 Nov
Emacs and the Cybernetic Productivity
21 Sep
Parse podcast transcripts using ChatGPT
28 Aug
Documentation as Code for Cloud - PlantUML
30 Jul
Documentation as Code for Cloud
18 Jul
AWS Summit 2023 in Berlin
09 May
Read Hackernews and Reddit the Emacs way
21 Apr
AWS Custom resources with Lambda and Golang
06 Apr
Book summary: Fooled by randomness
04 Feb
Book summary: Four Thousand Weeks
27 Jan
Book summary: The Lonely Century
21 Jan

2022

Releasing Gocial
15 Dec
10 years in the InfoSec industry
02 Dec
Hexagonal Architecture in Python
24 Oct
Migrate Tiddlywiki to org-roam - Part 2: org-roam and hugo
04 Oct
Book summary: Building a Second Brain
27 Sep
Working in part-time
16 Sep
Migrate Tiddlywiki to org-roam - Part 1: Export Tiddlers
03 Sep
Book summary: Building Microservices (2nd Edition)
10 Aug
TiddlyWiki and Emacs
12 Jul
RSS/Atom, Emacs and elfeed
29 Jun
RSS and Atom for digital minimalists
13 Jun
Book summary: Breath - The New Science of a Lost Art
30 May
Book summary: Digital Minimalism
02 May
Presentation as Code
19 Jan
Music
05 Jan

2021

My 2021 review
13 Dec
Book review: Accelerate - The science of Lean software and DevOps
24 Nov
Bye bye Scout24!
15 Sep
Inbox Zero using Getpocket
01 Sep
HowTo: Convert pocket reader links to Epub and upload to Dropbox
15 Aug
Note taking in 2021
13 Jun
Security
18 May
Golang
11 May
Hugo
25 Apr
Implement an access key rotator
25 Apr
Hands-On Software architecture with Golang
18 Mar
Rust
15 Mar
Software Engineering
15 Mar
List all repos inside an organization using python and github3
10 Mar
emacs
26 Feb
Simple plugin architecture in Python
26 Feb
dev.to rss feeds
26 Feb
A JavaScript keylogger using a websocket Golang server
26 Feb
TDD
26 Feb
docker
26 Feb
Software Engineering
26 Feb
Scaling Static Analyses at Facebook
26 Feb
Lessons from building static analysis tools at Google
26 Feb
AWS
26 Feb
BeyondCorp
26 Feb
4 years and 7 days later
08 Feb

2018

hacklu 2018
19 Oct

2017

Some forensics mini-challenge
01 Feb

2016

ringzer0 CTF - Binaries - Introduction to MIPS
09 Dec
ringzer0 CTF - Binaries - Heap Allocator
30 Nov
ringzer0 CTF - Binaries - Time to learn x86 ASM and gdb
29 Nov
ringzer0 CTF - SysAdmin Linux
30 Oct
ringzer0 CTF - JavaScript challenges
29 Oct
Fuzzing the hell out of conntrack tools
28 Oct
hack.lu conference 2016
21 Oct
ringzer0 CTF - Jail Escaping C
19 Sep
Automatic file uploads
26 Aug
Testing shellcodes
23 Aug
ringzer0 CTF - Jail Escaping PHP
20 Jun
ringzer0 CTF - Jail Escaping Bash
20 Jun
Distribute your backups using git-annex
16 Jun
The Digital Future in Berlin
11 May
AWS Summit in Berlin 2016
12 Apr
TLS Client authentication using Bitnami Nginx stack
18 Feb
Chrooting nginx, php-fpm and mysql using Bitnami
12 Feb
Steve Jobs by Walter Isaacson
01 Feb
Bye bye VODKA!
01 Feb
Some words on CSRF and cookies
26 Jan
No DNAT to localhost
20 Jan
HowTo: Put nginx and PHP to jail in Debian 8
15 Jan
Video editing with ffmpeg and kdenlive
08 Jan

2015

OpenVPN for paranoids
17 Nov
Advanced inter VLAN switching using Cisco
06 Nov
Basic Layer 2 Switching using Cisco Packet Tracer
21 Oct
Manage PKI using OpenSSL
02 Oct
Organizing and visualizing knowledge
17 Sep
Debugging Android native shared libraries
01 Jul
Decode Adobe Flex AMF protocol
22 Jun
Validating and pinning X.509 certificates
24 May
Adding concurrency to smalisca
06 May
gethostbyname vs. getaddrinfo
30 Apr
Coming back to C/C++ after 2 years
21 Apr
usd AG Hacker challenge 2015 - Solutions
18 Mar
The iOS 8.1.3 fiasco
26 Feb
Android remote sniffing using Tcpdump, nc and Wireshark
20 Feb
Redirect Androids traffic to Burp
19 Feb
GUIfy your Apps using Flask
05 Feb
Android Hacker's Handbook
15 Jan
A practical guide to Advanced Networking
08 Jan

2014

2014 - Personal review
22 Dec
Import Burp cert into Android
03 Dec
Re-Root Nexus 10 4.x
02 Dec
HowTo: Proxy Non-Proxy-Aware Android Applications through Burp
02 Dec
Using Blockdiag with Pelican and liquid tags
21 Nov
Using Graphviz with Pelican and liquid tags
13 Nov
HowTo: iOS Apps - Static analysis
29 Oct
Generate all IP addresses from ASN
17 Sep
HowTo: Androguard with Docker
12 Sep
Using JQuery DataTables with IPython
28 Aug
HowTo: Debug Android APKs with Eclipse and DDMS
21 Aug
Web Application Survey Tutorial
06 Aug
Python for Data Analysis
06 Aug
Android Dynamic Code Analysis - Mastering DroidBox
05 Aug
Disect Android APKs like a Pro - Static code analysis
07 Jul
On Java, OpenSSL, Crypto, Blowfish and stuff
01 Jul
WhatsApp bot
29 Jun
Migrate this blog from Octopress to Pelican
18 Jun
Googles XSS Game - Solutions
02 Jun
BerlinSides 0x05
27 May
HowTo: Write pentest reports the easy way
20 May
HowTo: Create docs with sphinx
04 May
netgrafio
01 May
Unfancy dashboard using matplotlib
07 Mar
Links of the Week 27
14 Feb
Links of the Week 26
07 Feb
Links of the Week 25
31 Jan
Links of the Week 24
24 Jan
24h Android sniffing using tcpdump - IPython Notebook Version
23 Jan
24h Android sniffing using tcpdump
23 Jan
Links of the Week 23
17 Jan

2013

Links of the Week 22
20 Dec
Links of the Week 21
15 Dec
Links of the Week 20
06 Dec
Convert IP ranges to list
04 Dec
Links of the Week 19
29 Nov
Links of the Week 18
22 Nov
Links of the Week 17
18 Nov
Links of the Week 16
08 Nov
Links of the Week 15
01 Nov
Links of the Week 14
25 Oct
Links of the Week 13
18 Oct
Links of the Week 12
20 Sep
Links of the Week 11
13 Sep
HowTo: Automate nmap scanning
13 Sep
Dissecting BlackTiny
25 Aug
Links of the Week 10
23 Aug
Gentoo, systemd, consolekit, udev and some failed system update
10 Aug
Links of the Week 9
09 Aug
Links of the Week 8
09 Aug
HowTo: Automate Burp using Burp Extender API
02 Aug
Links of the week 7
12 Jul
HowTo: Root your Kindle 3
03 Jul
Links of the Week 6
28 Jun
Dinge, die ein Informatikerstudent niemals sagen würde
26 Jun
Links of the Week 5
21 Jun
Links of the Week 4
07 Jun
Links of the Week 3
31 May
Links of the Week 2
24 May
Introducing Links of the Week (LOW) 1
17 May
Hacking Altoro Mutual
06 May
OverTheWire: Vortex Level1
03 May
OverTheWire: Vortex Level2
02 May

2012

CCC / 29C3
30 Dec
HowTo: Split MP3s by silence detection using mp3splt
01 Apr
HowTo: Have a web performance boost with Nginx
26 Jan

2011

Need any sh3ll?
19 Dec
Add Namecheap Mail account (OX Mail) to Thunderbird
30 Nov
Die stinkenden Informatiker
12 Nov
Thank God there is iodine! IPv4 over DNS
09 Nov
HowTo: Redmine, Lighttpd with Debian
07 Nov
HowTo: Keep your passwords safe using SQLite and SQLCipher
28 Jul
HowTo: Convert MTS to MKV using tsMuxeR and ffmpeg
28 Jun
Free PPTP VPN servers
24 Jun
VNC: Connect to current desktop session using x11vnc and ssh
04 Apr
Block facebook with iptables on OpenWrt
02 Apr
OpenBSD, FreeBSD, NetBSD - I do love beasts!
21 Mar
My own cheap NAS - the OpenWRT way
19 Mar
HowTo: Full-Encrypt data using Gentoo,Luks and initramfs
07 Mar
Think before you type part 2
26 Feb
Stay clean and anonymous with Google Apps
10 Feb
OpenBSD 4.8 - First impressions
04 Feb

2010

Simple memory managment using linked lists (implement my_malloc and my_free)
06 Dec
HowTo: SNAT/IP Masquerade between 2 wlan cards on Linux
25 Nov
Find out your geolocation via MAC address
07 Oct
HowTo: Secure your server using icmpKNOCK
03 Oct
How to compile Robert you suck ^^
30 Sep
DEADF700? Stuxnet!
27 Sep
The Ac1db1tch3z exploit and "Robert you suck" thingie
17 Sep
icmpKNOCK v0.2 released
13 Sep
Drupals clean urls using Lighttpd: Moved from Lua to rewrite-once
07 Sep
Speed up Drupal by preloading the page cache
04 Sep
Its time to say goodbye! RIP 2010-07!
29 Jul
Sommersemester 2010 online!
26 Jul
Java? Without Eclipse? Eclim!
05 Jun
Bildungsforschung? Rechtschreibung waere besser
14 May
Birthday paradox/problem
07 May
Torrents over TOR?! Don't!
03 May
Word lists/dictionaries compilation
01 Apr
rm -rf / and some kernel panic
26 Mar
HowTo: Create new Debian domU using Xen on *BSD
22 Mar
Inside the mind of a Russian hacker
11 Mar
HowTo: Qemu networking on NetBSD
01 Mar

2009

Attacking Trusted Platform Module (TPM)
05 Dec
Pidgin stores account data in plaintext!
23 Nov
NetBSD, Linux, Xen - Does it work?
14 Nov
Simple MAC address generator
14 Oct
Some Drupal peculiarities
15 Sep
Keep your system up2date!
07 Sep
NetBSD, kernel downgrade and some voodoo!
20 Aug
FU here I come!
12 Aug
HowTo: SSH-Tunnel over CorkScrew using Tor
05 Aug
icmpKNOCK - ICMP port knocking server
31 Jul
CoWPAtty 4.2 for NetBSD
22 Jul
Ganxtaville52 Luebecker Hood
08 Jul
HowTo: RsynCrypto - The backup jewel
25 Jun
OverTheWire: Vortex Level0
21 May
Der Buschfunk kommt
07 May
NetBSD rulez!
05 May
Turn VIM into your favourite IDE
24 Apr
Why use Python? The n00b mini-review
07 Apr
HowTo: Get SETOF from Array in PostgreSQL
30 Mar
Bye Bye Immobilo!
18 Mar

2008

Viral Infections on Linux
26 Nov
Mod2Exec - Execute modules
26 Nov

0001

Archive
01 Jan
Emacs
01 Jan
ORG Mode
01 Jan