Posts

My 2025 review
03 Feb 2026
Digital and Analogue: The balance that works for me
05 Jun 2025
Add pagefind search to hugo
10 Apr 2025
Book Summaries: January - March 2025
02 Apr 2025
Book Summaries: October - December 2024
16 Jan 2025
My 2024 review
19 Dec 2024
Mastering Golang Debugging in Emacs
28 Nov 2024
Book summaries: May - September 2024
16 Oct 2024
Bye Bye Cashlink!
11 Jul 2024
Book summaries: January - April 2024
05 May 2024
From Doom to Vanilla Emacs
22 Feb 2024
My 2023 review
02 Jan 2024
Documentation as Code for Cloud - C4 Model & Structurizr
02 Nov 2023
Emacs and the Cybernetic Productivity
21 Sep 2023
Parse podcast transcripts using ChatGPT
28 Aug 2023
Documentation as Code for Cloud - PlantUML
30 Jul 2023
Documentation as Code for Cloud
18 Jul 2023
AWS Summit 2023 in Berlin
09 May 2023
Read Hackernews and Reddit the Emacs way
21 Apr 2023
AWS Custom resources with Lambda and Golang
06 Apr 2023
Book summary: Fooled by randomness
04 Feb 2023
Book summary: Four Thousand Weeks
27 Jan 2023
Book summary: The Lonely Century
21 Jan 2023
Releasing Gocial
15 Dec 2022
10 years in the InfoSec industry
02 Dec 2022
Hexagonal Architecture in Python
24 Oct 2022
Migrate Tiddlywiki to org-roam - Part 2: org-roam and hugo
04 Oct 2022
Book summary: Building a Second Brain
27 Sep 2022
Working in part-time
16 Sep 2022
Migrate Tiddlywiki to org-roam - Part 1: Export Tiddlers
03 Sep 2022
Book summary: Building Microservices (2nd Edition)
10 Aug 2022
TiddlyWiki and Emacs
12 Jul 2022
RSS/Atom, Emacs and elfeed
29 Jun 2022
RSS and Atom for digital minimalists
13 Jun 2022
Book summary: Breath - The New Science of a Lost Art
30 May 2022
Book summary: Digital Minimalism
02 May 2022
Presentation as Code
19 Jan 2022
My 2021 review
13 Dec 2021
Book review: Accelerate - The science of Lean software and DevOps
24 Nov 2021
Bye bye Scout24!
15 Sep 2021
Inbox Zero using Getpocket
01 Sep 2021
HowTo: Convert pocket reader links to Epub and upload to Dropbox
15 Aug 2021
Note taking in 2021
13 Jun 2021
Implement an access key rotator
25 Apr 2021
4 years and 7 days later
08 Feb 2021
Some forensics mini-challenge
01 Feb 2017
ringzer0 CTF - Binaries - Introduction to MIPS
09 Dec 2016
ringzer0 CTF - Binaries - Heap Allocator
30 Nov 2016
ringzer0 CTF - Binaries - Time to learn x86 ASM and gdb
29 Nov 2016
ringzer0 CTF - SysAdmin Linux
30 Oct 2016
ringzer0 CTF - JavaScript challenges
29 Oct 2016
Fuzzing the hell out of conntrack tools
28 Oct 2016
hack.lu conference 2016
21 Oct 2016
ringzer0 CTF - Jail Escaping C
19 Sep 2016
ringzer0 CTF - Jail Escaping Bash
20 Jun 2016
ringzer0 CTF - Jail Escaping PHP
20 Jun 2016
Distribute your backups using git-annex
16 Jun 2016
The Digital Future in Berlin
11 May 2016
AWS Summit in Berlin 2016
12 Apr 2016
Chrooting nginx, php-fpm and mysql using Bitnami
12 Feb 2016
Bye bye VODKA!
01 Feb 2016
Steve Jobs by Walter Isaacson
01 Feb 2016
Some words on CSRF and cookies
26 Jan 2016
HowTo: Put nginx and PHP to jail in Debian 8
15 Jan 2016
OpenVPN for paranoids
17 Nov 2015
Advanced inter VLAN switching using Cisco
06 Nov 2015
Basic Layer 2 Switching using Cisco Packet Tracer
21 Oct 2015
Manage PKI using OpenSSL
02 Oct 2015
Organizing and visualizing knowledge
17 Sep 2015
Debugging Android native shared libraries
01 Jul 2015
Validating and pinning X.509 certificates
24 May 2015
Adding concurrency to smalisca
06 May 2015
gethostbyname vs. getaddrinfo
30 Apr 2015
Coming back to C/C++ after 2 years
21 Apr 2015
usd AG Hacker challenge 2015 - Solutions
18 Mar 2015
The iOS 8.1.3 fiasco
26 Feb 2015
GUIfy your Apps using Flask
05 Feb 2015
Android Hacker's Handbook
15 Jan 2015
A practical guide to Advanced Networking
08 Jan 2015
2014 - Personal review
22 Dec 2014
HowTo: Proxy Non-Proxy-Aware Android Applications through Burp
02 Dec 2014
Using Blockdiag with Pelican and liquid tags
21 Nov 2014
Using Graphviz with Pelican and liquid tags
13 Nov 2014
HowTo: iOS Apps - Static analysis
29 Oct 2014
Generate all IP addresses from ASN
17 Sep 2014
HowTo: Androguard with Docker
12 Sep 2014
Using JQuery DataTables with IPython
28 Aug 2014
HowTo: Debug Android APKs with Eclipse and DDMS
21 Aug 2014
Python for Data Analysis
06 Aug 2014
Web Application Survey Tutorial
06 Aug 2014
Android Dynamic Code Analysis - Mastering DroidBox
05 Aug 2014
Disect Android APKs like a Pro - Static code analysis
07 Jul 2014
On Java, OpenSSL, Crypto, Blowfish and stuff
01 Jul 2014
WhatsApp bot
29 Jun 2014
Migrate this blog from Octopress to Pelican
18 Jun 2014
Googles XSS Game - Solutions
02 Jun 2014
BerlinSides 0x05
27 May 2014
HowTo: Write pentest reports the easy way
20 May 2014
HowTo: Create docs with sphinx
04 May 2014
Unfancy dashboard using matplotlib
07 Mar 2014
Links of the Week 27
14 Feb 2014
Links of the Week 26
07 Feb 2014
Links of the Week 25
31 Jan 2014
Links of the Week 24
24 Jan 2014
24h Android sniffing using tcpdump
23 Jan 2014
24h Android sniffing using tcpdump - IPython Notebook Version
23 Jan 2014
Links of the Week 23
17 Jan 2014
Links of the Week 22
20 Dec 2013
Links of the Week 21
15 Dec 2013
Links of the Week 20
06 Dec 2013
Convert IP ranges to list
04 Dec 2013
Links of the Week 19
29 Nov 2013
Links of the Week 18
22 Nov 2013
Links of the Week 17
18 Nov 2013
Links of the Week 16
08 Nov 2013
Links of the Week 15
01 Nov 2013
Links of the Week 14
25 Oct 2013
Links of the Week 13
18 Oct 2013
Links of the Week 12
20 Sep 2013
HowTo: Automate nmap scanning
13 Sep 2013
Links of the Week 11
13 Sep 2013
Dissecting BlackTiny
25 Aug 2013
Links of the Week 10
23 Aug 2013
Gentoo, systemd, consolekit, udev and some failed system update
10 Aug 2013
Links of the Week 8
09 Aug 2013
Links of the Week 9
09 Aug 2013
HowTo: Automate Burp using Burp Extender API
02 Aug 2013
Links of the week 7
12 Jul 2013
HowTo: Root your Kindle 3
03 Jul 2013
Links of the Week 6
28 Jun 2013
Dinge, die ein Informatikerstudent niemals sagen würde
26 Jun 2013
Links of the Week 5
21 Jun 2013
Links of the Week 4
07 Jun 2013
Links of the Week 3
31 May 2013
Links of the Week 2
24 May 2013
Introducing Links of the Week (LOW) 1
17 May 2013
Hacking Altoro Mutual
06 May 2013
OverTheWire: Vortex Level1
03 May 2013
OverTheWire: Vortex Level2
02 May 2013
CCC / 29C3
30 Dec 2012
HowTo: Split MP3s by silence detection using mp3splt
01 Apr 2012
HowTo: Have a web performance boost with Nginx
26 Jan 2012
Need any sh3ll?
19 Dec 2011
Add Namecheap Mail account (OX Mail) to Thunderbird
30 Nov 2011
Die stinkenden Informatiker
12 Nov 2011
Thank God there is iodine! IPv4 over DNS
09 Nov 2011
HowTo: Redmine, Lighttpd with Debian
07 Nov 2011
HowTo: Keep your passwords safe using SQLite and SQLCipher
28 Jul 2011
HowTo: Convert MTS to MKV using tsMuxeR and ffmpeg
28 Jun 2011
Free PPTP VPN servers
24 Jun 2011
VNC: Connect to current desktop session using x11vnc and ssh
04 Apr 2011
Block facebook with iptables on OpenWrt
02 Apr 2011
OpenBSD, FreeBSD, NetBSD - I do love beasts!
21 Mar 2011
My own cheap NAS - the OpenWRT way
19 Mar 2011
HowTo: Full-Encrypt data using Gentoo,Luks and initramfs
07 Mar 2011
Think before you type part 2
26 Feb 2011
Stay clean and anonymous with Google Apps
10 Feb 2011
OpenBSD 4.8 - First impressions
04 Feb 2011
Simple memory managment using linked lists (implement my_malloc and my_free)
06 Dec 2010
HowTo: SNAT/IP Masquerade between 2 wlan cards on Linux
25 Nov 2010
Find out your geolocation via MAC address
07 Oct 2010
HowTo: Secure your server using icmpKNOCK
03 Oct 2010
How to compile Robert you suck ^^
30 Sep 2010
DEADF700? Stuxnet!
27 Sep 2010
The Ac1db1tch3z exploit and "Robert you suck" thingie
17 Sep 2010
icmpKNOCK v0.2 released
13 Sep 2010
Drupals clean urls using Lighttpd: Moved from Lua to rewrite-once
07 Sep 2010
Speed up Drupal by preloading the page cache
04 Sep 2010
Its time to say goodbye! RIP 2010-07!
29 Jul 2010
Sommersemester 2010 online!
26 Jul 2010
Java? Without Eclipse? Eclim!
05 Jun 2010
Bildungsforschung? Rechtschreibung waere besser
14 May 2010
Birthday paradox/problem
07 May 2010
Torrents over TOR?! Don't!
03 May 2010
Word lists/dictionaries compilation
01 Apr 2010
rm -rf / and some kernel panic
26 Mar 2010
HowTo: Create new Debian domU using Xen on *BSD
22 Mar 2010
Inside the mind of a Russian hacker
11 Mar 2010
HowTo: Qemu networking on NetBSD
01 Mar 2010
Attacking Trusted Platform Module (TPM)
05 Dec 2009
Pidgin stores account data in plaintext!
23 Nov 2009
NetBSD, Linux, Xen - Does it work?
14 Nov 2009
Simple MAC address generator
14 Oct 2009
Some Drupal peculiarities
15 Sep 2009
Keep your system up2date!
07 Sep 2009
NetBSD, kernel downgrade and some voodoo!
20 Aug 2009
FU here I come!
12 Aug 2009
HowTo: SSH-Tunnel over CorkScrew using Tor
05 Aug 2009
icmpKNOCK - ICMP port knocking server
31 Jul 2009
CoWPAtty 4.2 for NetBSD
22 Jul 2009
Ganxtaville52 Luebecker Hood
08 Jul 2009
HowTo: RsynCrypto - The backup jewel
25 Jun 2009
OverTheWire: Vortex Level0
21 May 2009
Der Buschfunk kommt
07 May 2009
NetBSD rulez!
05 May 2009
Turn VIM into your favourite IDE
24 Apr 2009
Why use Python? The n00b mini-review
07 Apr 2009
HowTo: Get SETOF from Array in PostgreSQL
30 Mar 2009
Bye Bye Immobilo!
18 Mar 2009
Mod2Exec - Execute modules
26 Nov 2008
Viral Infections on Linux
26 Nov 2008