Understanding ZFS block sizes
ZFS is about the most complex filesystem for single-node storage servers. Coming with its sophistication is its equally confusing “block size”, which is normally self-evident on common filesystems ...
Debugging Proxmox VE Firewall Dropping TCP Reset Packets
A few days back when I was setting up a new VM to host some extra websites, I noticed an unexpected Nginx error page. As I don’t administer the new websites, I just added reverse proxy rules on the...
Running a dual-protocol OpenVPN/WireGuard VPN server on one port
Public Wi-Fi and some campus network typically block traffic from unauthenticated clients, but more often allow traffic targeting UDP port 53 to pass through, which is normally used for DNS queries...
Prolonging eMMC Life Span with Proxmox VE
Since my blog on installing Proxmox VE on eMMC, there’s been a lot of discussion over the Internet on this. I suspect that Proxmox decided not to include eMMCs in their hardware options by design, ...
My automated Daily Health Report infrastructure
Back in the days when the Zero COVID policy was prevailing, our university introduced a Daily Health Report system. Students and faculty were mandated to submit a daily online form detailing their ...
Overengineering Advent of Code 2022
Advent of Code (Wikipedia, link) is an annual event that releases a programming puzzle every day from December 1 to December 25. It’s a great chance to learn a new language or practice your skills.