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Articole: 33
  1. Pihole and IPv6

    I recently bought a cheap server to run at home, and set up pihole.

  2. Mount MacPherson

    2427m (427m prominence) Monashee Mountains, Gold Range Revelstoke, BC In late August my brother and I were looking for a nice, accessible summit to do in the area, and settled on Mount MacPherson as a good candidate.

  3. Mount Carnarvon

    3046m (406m prominence) Canadian Rockies, Waputik Mountains Yoho National Park, BC I was camping in the beautiful Yoho National Park, so naturally it was time to climb a big mountain.

  4. Mount Fosthall

    2686m (816m prominence) Monashee Mountains, Gold Range Monashee Provincial Park, BC There are two standard ways to do Mount Fosthall, both gaining the south ridge from the south east.

  5. Trip report: Cape Wrath Trail

    The Cape Wrath Trail is an approximately 350 km (220 mi) walk through the Scottish Highlands, stretching from Fort William to the northwesternmost point of mainland Britain, Cape Wrath.

  6. DamCTF: crypto/guess-secret

    This challenge asks us to break a ‘super secure and efficient communication method’.

  7. Bazel, Go and Protobufs

    Suppose you’re setting up your first project using Bazel, written in Go and using Protobufs as a data format.

  8. Exploring Facebook's network

    What does the (physical) network of a big internet company like Facebook look like?

  9. Sanity checks

    In my line of work I’ve dealt with a lot of automated data pipelines that feed into production systems.

  10. RedpwnCTF: mallcop

    Mallcop was the least-solved challenge in the Misc category.

  11. RedpwnCTF: Alien Transmissions

    This was one of the higher scoring challenges I completed.

  12. Playing with ICMP and NAT

    ICMP stands for Internet Control Message Protocol.

  13. uid

    What happens when an unprivileged user runs the binary -r-s---r-x 1 root root 1024 Mar 17 21:57 binary which executes the following lines of code?

  14. Cryptobin

    Over the holidays I spent some time on two different but related sets of challenges.

  15. Internet 101: TCP

    This article assumes the reader has basic knowledge of IP.

  16. Internet 101: Autonomous systems

    This article assumes basic knowledge of IP and CIDR.

  17. Internet 101: CIDR

    This article assumes the reader has basic knowledge of IP.

  18. Internet 101: IP

    The Internet Protocol is responsible for moving data across network boundaries.

  19. Hashwalk

    Hashwalk is an exercise in futility.

  20. OverTheWire: Bandit

    Today I finished the Bandit wargame at OverTheWire.

  21. Character encoding refresher

    Sometimes I forget the details on different character encodings.

  22. Topological sorts

    Detecting and finding cycles in directed graphs are common problems in graph theory.

  23. If you use Spring Boot to set up an endpoint using @RequestMapping with a @PathVariable at the end of the request URI, you might run into several quirks if this path variable happens to include a dot.

  24. Lattices and sphere packings

    This article assumes basic knowledge of linear algebra and group theory.

  25. AVR programming with Arduino

    Written by Victor van Poppelen.

  26. What is Diffie-Hellman?

    This article assumes knowledge of basic group theory, and basic asymptotic complexity (big O notation).

  27. Styling machine schedules in LaTeX

    Recently I worked on a project about the Job Shop Problem, and came across the need to visualize the machine schedules that were being generated.

  28. Microcorruption CTF: Hollywood

    This is my writeup for “Hollywood”, the very last level on the Microcorruption CTF.

  29. Microcorruption CTF: Chernobyl

    This is my writeup for “Chernobyl”, the second to last level on the Microcorruption CTF.

  30. Microcorruption CTF: Lagos

    This is my writeup for the “Lagos” level in the Microcorruption CTF.

  31. Microcorruption CTF: Bangalore

    This is my writeup for the “Bangalore” level on the Microcorruption CTF.

  32. Particle swarm optimization

    Particle swarm optimization (PSO) is a local search metaheuristic.

  33. 0

    Hi, I’m Alex and I’ll be writing about stuff that I’m interested in.