Posted by jpluimers on 2026/07/23
Missed the original announcement of [Wayback/Archive] Implement DNS in a weekend
Even after a few years, it is still a fun project to take on.
Via [Wayback/Archive] Julia Evans on Twitter: “it’s fun to see all the different languages people are implementing DNS in a Weekend in (implement-dns.wizardzines.com) — so far I’ve seen C#, Rust, Kotlin, Clojure, Golang, Elixir, Typescript, and Python”
More:
Posted in Communications Development, Development, DNS, Internet, Software Development, TCP, UDP | Leave a Comment »
Posted by jpluimers on 2026/07/08
This is cool: [Wayback/Archive] jawj/subtls: A proof-of-concept TypeScript TLS 1.3 client showing both the bytes and the decoded meaning of the data structures they form.
A demo is at [Wayback/Archive] https://subtls.pages.dev/
See this page fetch itself, byte by byte, over TLS
Based on / related:
Posted in Communications Development, Development, HTTP, Internet protocol suite, SMTP, TCP, TLS, Web Development | Leave a Comment »
Posted by jpluimers on 2026/06/18
[Wayback/Archive] RubyConf Mini 2022: Keynote: Learning DNS by Julia Evans – YouTube
Via [Wayback/Archive] 🔎Julia Evans🔍 on Twitter: “Just noticed that the recording of my keynote “Learning DNS in 10 Years” from @RubyConfMini is up!”
–jeroen
Posted in Communications Development, Development, DNS, Internet, Internet protocol suite, Power User, Software Development, TCP, UDP | Leave a Comment »
Posted by jpluimers on 2026/05/12
Weet altijd waar je zaken mee doet: [Wayback/Archive] Ontdek alle Nederlandse bedrijven uit het Handelsregister – OpenKvK.nl
Er is een API van in totaal 4 datasets volgens [Wayback/Archive] API documentatie – overheid.io:
Gerelateerd: [Wayback/Archive] Hacken voor Democratie | Hack de Overheid!
Posted in Communications Development, Development, HTTP, Internet protocol suite, REST, Software Development, TCP | Leave a Comment »
Posted by jpluimers on 2026/04/15
Most of the links from my blog get accompanied with Wayback or Archive.today links, but some don’t.
For those, I need to find a broken/404 link checker which I already hinted at in scr.im « Share your email in a safe way. Get less spam.
Some links that hopefully help me:
Posted in Development, HTTP, Internet protocol suite, Power User, Software Development, TCP, Web Development | Leave a Comment »
Posted by jpluimers on 2026/04/08
Not just for red teamers (:
[Wayback/Archive] GitHub – D00Movenok/BounceBack: ↕️🤫 Stealth redirector for your red team operation security
Via [WaybackSave/Archive] Florian Roth ⚡️ on X: “This is a legitimate part of red teaming”
[Wayback/Archive] Tom Dörr on X: “Reverse proxy hides infrastructure from scanners …”
--jeroen
Posted in Communications Development, Development, Go (golang), Power User, Red team, Security, Software Development | Leave a Comment »
Posted by jpluimers on 2026/01/06
Everytime when installing a pfSense router from scratch, I seem to re-learn a few of the below quirks. So it was finally time to document them (:
Quite a few of my pfSense configurations are just doing routing between various networks, should not provide DHCP leases and do not always need or have a WAN connected (i.e. they are LAN-only).
Posted in Communications Development, Conference Topics, Conferences, Cyberchef, Development, DHCP, Encoding, Event, Hardware, HTTP, Internet protocol suite, MikroTik, Network-and-equipment, pfSense, Power User, routers, Software Development, SSH, TCP, TLS, UDP | Tagged: 8846 | Leave a Comment »
Posted by jpluimers on 2026/01/01
Cool, since I switched to Let’s Encrypt a long while ago, I missed that various tools now require TLS expiration be no longer than 398 days away (and preferably even 397 days).
So I also missed the reason for that specific number of days. [Wayback/Archive] ssl – Why was 398 days chosen for TLS expiration? – Stack Overflow (thanks [Wayback/Archive] stevendesu and [Wayback/Archive] user10063)
answers it:
366+31+1 = 398 days
It equals one leap year + one month + “a little room to handle the messiness of dates.”
then posts a lot of quotes from references to the history on how that reason came to be. I have archived and listed the links below.
Most of the discussion was during a very hectic time in life: after a single sided bad accident my mentally retarded brother was in and assisting him during his recovery period, I developed cancer and had extensive treatments against it. All the more reason for missing all this:
Posted in Communications Development, Development, Encryption, https, HTTPS/TLS security, Internet protocol suite, Let's Encrypt (letsencrypt/certbot), Power User, Security, TCP, TLS | Tagged: 138, 195 | Leave a Comment »
Posted by jpluimers on 2025/12/26
Anxious to see how many routers have improved their algorithms to prevent Bufferfloat.
[Wayback/Archive] Bufferbloat, The Internet, And How To Fix It | Hackaday
The following YouTube videos in it are embedded below the blog signature:
Posted in Communications Development, Development, Internet protocol suite, LifeHacker, Network-and-equipment, Power User, routers, TCP, UDP | Tagged: bufferbloat, latency, jitter, WiFi, Linux, OpenWRT | Leave a Comment »
Posted by jpluimers on 2025/12/10
A while ago I got an error 103 using both Beyond Compare. That did not whos the connection log or error reason, but WinSCP did: it mentioned unexpected output during the logon.
I got reminded that I had already solved this error before via [Wayback/Archive] SSH login works but SFTP login doesn’t – Server Fault (thanks [Wayback/Archive] qreon and [Wayback/Archive] Paulus):
Posted in *nix, *nix-tools, bash, bash, Beyond Compare, Communications Development, Development, Internet protocol suite, Power User, Scripting, SFTP, Software Development, SSH, TCP, Windows, WinSCP | Leave a Comment »
The Wiert Corner - irregular stream of stuff 