[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
Archive for the ‘TCP’ Category
RubyConf Mini 2022: Keynote: Learning DNS by Julia Evans – YouTube
Posted by jpluimers on 2026/06/18
Posted in Communications Development, Development, DNS, Internet, Internet protocol suite, Power User, Software Development, TCP, UDP | Leave a Comment »
Ontdek alle Nederlandse bedrijven uit het Handelsregister – OpenKvK.nl
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:
- [Wayback/Archive] BAG adres & postcode API documentatie – overheid.io
- [Wayback/Archive] Energielabels API documentatie – overheid.io
- [Wayback/Archive] Nederlandse Kenteken API documentatie – overheid.io
- [Wayback/Archive] OpenKvK V3 API documentatie – overheid.io / [Wayback/Archive] OpenKvK API documentatie – overheid.io
Gerelateerd: [Wayback/Archive] Hacken voor Democratie | Hack de Overheid!
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Posted in Communications Development, Development, HTTP, Internet protocol suite, REST, Software Development, TCP | Leave a Comment »
Need to find a “smart” broken/404 link checker
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:
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Posted in Development, HTTP, Internet protocol suite, Power User, Software Development, TCP, Web Development | Leave a Comment »
A few pfSense quirks I got used to over the years
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).
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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 »
ssl – Why was 398 days chosen for TLS expiration? – Stack Overflow
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:
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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 »
Bufferbloat, The Internet, And How To Fix It | Hackaday
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:
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Posted in Communications Development, Development, Internet protocol suite, LifeHacker, Network-and-equipment, Power User, routers, TCP, UDP | Tagged: bufferbloat, jitter, latency, Linux, OpenWRT, WiFi | Leave a Comment »
When you get an error 103 establishing an SFTP
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):
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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 »
Some ADS-B API link notes (hoping to be able to get from/to airport data from it)
Posted by jpluimers on 2025/10/28
For my link archive initiated because I was trying to find out why ADS-B Exchange does not list originating and destination airports for flights, then on how to get at that data.
It is grouped in a few parts, starting with:
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Posted in Communications Development, Development, HTTP, Internet protocol suite, JavaScript/ECMAScript, JSON, REST, Scripting, Software Development, TCP, Web Development | Leave a Comment »
GitHub – rbwebdev/lemmings-page-404: My 404 page with a little game of Lemmings
Posted by jpluimers on 2025/08/26
Last week I wrote about Example how not to return a HTPP-500 result: Amazon DE – Tut uns Leid!.
Today I found https://archive.is/undefined which consistently returns a HTTP 404 in the HTTP result.
It reminded me of an old (well, what is old anyway <g>) post Best 404 page ever. back in the days (returning both 404 in the HTTP result and page content) I did not yet archive outgoing links (it took me a few more years to realise many URLs are ephemeral and have queued up a post on that for early next year), and found out the site has changed since then. Time for archived and updated links, and a repository too as by now the source has been published on GitHub:
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Posted in Communications Development, Development, HTML, HTTP, Internet protocol suite, Software Development, Web Development | Leave a Comment »
Example how not to return a HTPP-500 result: Amazon DE – Tut uns Leid!
Posted by jpluimers on 2025/08/14
Amazon shows how not to return an HTTP 500 (Internal Server Error) result page: a page with content 500, but result HTTP 200 (OK).
[Wayback] https://www.amazon.de/errors/500
--jeroen
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Posted in Communications Development, Development, HTML, HTTP, Internet protocol suite, Software Development, TCP, Web Development | Leave a Comment »
The Wiert Corner - irregular stream of stuff 