Top all-time · #4514
Guanzhong Chen
Personal blog · quantum5.ca · on HN as quantum5programmingsecuritysystems
Guanzhong Chen writes Quantum, a personal blog at quantum5.ca about programming, security and systems. Since 2022, 17 different Hacker News readers have linked it 24 times, most often “What I wish I knew when I got my ASN”. It is still writing: the last post was on 2026-10-17, and you can follow it by feed.
Too few sampled comments (3) to say how often HN recommends it.?
Why HN links it
Readers link Guanzhong Chen's blog for its introduction to BGP and routing, written by the operator of a small autonomous system, and for a piece on IP address topics. One comment calls that piece a good article.
Summarised by Claude from a sample of 3 HN comments that link here. Each comment is marked recommending, critical or neutral (citing without judging); how this works.
Quantum’s (a.k.a. Guanzhong Chen) blog about coding, security, and other computer technology.
Most-linked posts?
- What I wish I knew when I got my ASN3 people · 3 mentions · first linked 2023-10-12
- A whirlwind tour of systemd-nspawn containers (2025)3 people · 3 mentions · first linked 2025-09-07
- Fixing a Bricked Framework Laptop2 people · 2 mentions · first linked 2026-08-17
- Simple NDP Proxy to Route Your IPv6 VPN Addresses (2019)2 people · 2 mentions · first linked 2024-11-27
- Using astronomy to calculate the French Republican Calendar2 people · 2 mentions · first linked 2022-03-10
What Hacker News says?
It'd be cool to see a nice UI (like this) atop something a little better built out & defined like systemd-nspawn. Like Quadlet for containers, Nspawn for VMs is a nice base with tons of great capabilities & very standard management patterns. There's nice .nspawn files and drop ins, where config lies, and (semi) standard paths for mounts and machines. Having that stable standard base would raise my interest & confide…
Comment linking /2025/03/22/whirlwind-tour-of-systemd-nspawn-containers/
on “Show HN: Lightweight tool for managing Linux virtual machines”Submitted Fast and cheap bulk storage: using LVM to cache HDDs on SSDs as a story · 223 points
HN discussionFor anyone who felt "this is more about what routing than BGP" the next article linked at the end starts to really dive into the BGP parts and can be started directly from if you're familiar with any form of routing: https://quantum5.ca/2023/07/19/diving-into-autonomous-system...
Comment linking /2023/07/19/diving-into-autonomous-systems/
on “An Introduction to BGP from the operator of a small AS”Submitted An Introduction to BGP from the operator of a small AS as a story · 60 points
HN discussionGood article on this topic: https://quantum5.ca/2023/10/10/what-i-wish-i-knew-when-i-got... Recently, I've created an interactive map of all IPv4 addresses, PTAL: https://reversedns.space/
Comment linking /2023/10/10/what-i-wish-i-knew-when-i-got-my-asn/
on “Tech CEO Sentenced to 5 Years in IP Address Scheme”Submitted A whirlwind tour of systemd-nspawn containers (2025) as a story · 55 points
HN discussionSubmitted Fixing a Bricked Framework Laptop as a story · 21 points
HN discussionSubmitted Docker Considered Harmful (2025) as a story · 19 points
HN discussionSubmitted Using astronomy to calculate the French Republican Calendar as a story · 4 points
HN discussionSubmitted The Art of Time-Keeping, Part 2: Time as a story · 3 points
HN discussionSubmitted Custom mechanical keyboard: OS-specific custom RGB lighting with QMK as a story · 2 points
HN discussionSubmitted Simple NDP Proxy to Route Your IPv6 VPN Addresses (2019) as a story · 2 points
HN discussionSubmitted The Art of Time-Keeping, Part 4: French Republican Calendar as a story · 2 points
HN discussionSubmitted Journey and lessons from running a mirroring service at home as a story · 2 points
HN discussionSubmitted Microsecond Accurate Time Synchronization on LAN with PTP as a story · 2 points
HN discussionSubmitted DIY a Stratum 1 NTP Server with a Serial Port as a story · 2 points
HN discussionSubmitted Fixing a bricked AMD 7040 series Framework 13" laptop with $20 tools as a story · 1 points
HN discussionSubmitted A whirlwind tour of systemd-nspawn containers (2025) as a story · 1 points
HN discussionSubmitted Simple NDP proxy to route your IPv6 VPN addresses as a story · 1 points
HN discussionSubmitted On BGP Route Selection and High Availability via Anycast as a story · 1 points
HN discussionSubmitted What I wish I knew when I got my ASN as a story · 1 points
HN discussionSubmitted What I wish I knew when I got my ASN as a story · 1 points
HN discussionSubmitted ARM Assembly: ∞ Ways to Return (2017) as a story · 1 points
HN discussionSubmitted The Astronomy Behind Equinoxes and Solstices as a story · 1 points
HN discussion
