Links

This is a list of links which I find interesting.

Articles / blog entries

• Babel - a loop-avoiding distance-vector routing protocol
• Mesh networking with Yggdrasil
• The Gemini web: a brief intro
• The Invisible Internet Project Old Blog
• The Invisible Internet Project New Blog
• Exclusive Interview with Guntram: Lead Developer of a popular custom deGoogled Android ROM called LeOS
• IPv6 only hosting list 2022

Security / Privacy

• Stormy Cloud
• OSINT Tips
• Open-source tests of web browser privacy
• EFail Vulnerabilities in OpenPGP and S/MIME
• Global Privacy Control (HTTP header)
• The .zip TLD sucks and it needs to be immediately revoked
• Rosenpass
• Cloudflare as a threat / Avoid cloudflare

Forum “rules” / tips

• Don’t ask to ask, just ask
• The XY Problem

Books

• The Hitchhiker’s Guide to DFIR: Experiences From Beginners and Experts (free)
• wizard zines

Routing / Networking

• Linux Advanced Routing & Traffic Control HOWTO
• Task-centered iproute2 user guide

• Unofficial WireGuard Documentation

• Route Chain
• Traceroute Haiku

• Should I block ICMP?

• Nmap Cheat Sheet Source

• Linux Network Namespace in systemd

BGP

• BGP Filter Guides
• BGP Tutorial [YouTube] (English)
• local-pref considered evil (English)
• Network / IP Basics (German)
• iBGP Fundamentals (German)
• (e)BGP Fundamentals (German)
• Routing in the Internet (German)
• Policy based Routing (German)
• BGP und OSPF (German)
• Dynamisches Routing mit OSPF (German)
• List of providers that offer BGP sessions [Google Docs]
• BGP Reports
• µbgpsuite (including bgpgrep)

DN42

• Multiple servers on dn42: iBGP and IGPs by jlu5
• Routing and dn42 (English)
• Camp++ 0x7e0 // Joining dn42 by rotty+jomat (English)
• [[ch] dn42] (https://yewtu.be/watch?v=IOA9r0F-U7w) (English)
• Lookup DN42 addresses

DNS

• DNSSEC Guide
• Knowledge-Sharing and Instantiating Norms for DNS

Android

• Lagrange Pre-Release F-Droid Repo
• [IzzyOnDroid F-Droid Repo](https://apt.izzysoft.de/fdroid/
• Molly - Signal fork

Linux / Debian

• Bash-Oneliner

Tools

• I Know What You Download
• Cover Your Tracks
• DNS leak test
• neverssl.com
• Browser-Erweiterung, um Premiumangebote deutscher Nachrichtenseiten über Ihren Bibliothekszugang zu nutzen. (German(y))
• WTF does this company do? explain me
• Is BGP safe yet?
• RPKI test NLnet Labs

Shops

• Turris Router

Merchandise

• FSFE Merchandise
• FSF Merchandise
• digitalcourage shop
• Programming mascots
• Ubuntu Touch Merchandise
• I2P T-Shirt (EU)

Programming

• Google HTML/CSS Style Guide

Image galleries

• GitHub Octodex

Deployment

• Ansible - Migrating from with_X to loop

Simple programming exercises

• Sieve of Eratosthenes
• Josephus problem
• Pandigital number GeeksForGeeks
• Collatz conjecture

• Kaprekar Constant

• Implement a sorting algorithm
  • Bubblesort
  • Insertion sort
  • Selection sort
  • Quick sort (hard)
• Check if it is a …
  • … Floyd’s Triangle GeeksForGeeks Calculation (German)
  • … Palindromic number
  • … Ugly Numbers
  • … Prime number
  • … Leyland Number
  • … Disarium Number
  • … Abundant Number

Programs

• dns.chudo.i2p

Challenges

• [Gandalf

  Lakera - Prompt Injection](https://gandalf.lakera.ai/)

• Project Euler

Things, which are interesting, but I have not tested

• Tunneling Internet traffic over WhatsApp

Things I want to read

• The Very Unofficial Dummies Guide to Scapy (PDF) (Partly outdated, uses Python2)