The Wiert Corner – irregular stream of stuff

Jeroen W. Pluimers on .NET, C#, Delphi, databases, and personal interests

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Archive for the ‘Power User’ Category

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Buitenlandse trein/vlieg reizen vanuit Nederland zijn duurder dan via Nederland of geboekt via het buitenland

Posted by jpluimers on 2023/07/19

Eigen ervaringen om veel goedkoper uit te zijn:

  1. Boek je treinreis via een buitenlandse treinmaatschappij (www.bahn.de/angebot voor als je reis door Duitsland gaat) soms in twee delen (het land in en het land uit) die op elkaar aansluiten.
  2. Boek je vliegreis (met name KLM) vanaf het buitenland via Schiphol en maak voor de extra dag ervoor/erna een uitstapje.

[Wayback/Archive] Dezelfde rit, dezelfde trein naar het buitenland, maar bij de NS ben je duurder uit | RTL Nieuws

De nieuwe next.bahn.de site ondersteunt voorlopig alleen de Duitse taal, maar op de bestaande bahn.de site kun je daarnaast terecht in Tsjechisch, Deens, Engels, Spaans, Frans, Italiaans, Nederlands, of Pools.

Gerelateerd (later wanneer Archive Today weer Tweets kan archiveren komen de linkjes met archieven):

20230805 – twitter linkjes toegevoegd en deze gerelateerde tweet [Wayback/Archive] Andrea on Twitter: “@palpeet @DavidEerdmans @FemkevanH Je kunt je internationale treintickets(ook vanuit Nederland) in de meeste gevallen veel goedkoper vinden dan in Nederland als je dezelfde reis via Duitse, Oostenrijkse of Hongaarse spoorwegen boekt. Hier bijvoorbeeld. Even wat zoektijd investeren loont👉”

[Wayback/Archive] Super Sparpreis Europa: Günstige Bahntickets hier buchen – DB

20230919 – meer wees er bewust van dat de DB punctualiteit niet die van Zwitserland is en geregeld slechter (ja dat kan!) dan die van de NS is.

[Wayback/Archive] Kris: “Das alte Logo vom DB Navigator…” – chaos.social

Das alte Logo vom DB Navigator, aber es steht auf dem Kopf: Der ICE sieht nun aus wie ein schreiendes Legomännchen.

–jeroen

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Posted in LifeHacker, Power User | Leave a Comment »

APC SmartUPS Battery Float Voltage Calibration

Posted by jpluimers on 2023/07/19

For my link archive: [Wayback/Archive] APC SmartUPS Battery Float Voltage Calibration

It is my understanding that older BackUPS units could be adjusted with a potentiometer on the board. Calibration of newer models, and the SmartUPS line is factory set in the unit’s micro-controller. APC is of no assistance with units that are out of warranty. I’ve recently found information of how to recalibrate the battery float voltage through reprogramming the battery gain, and some information about modifying the UPS hardware, described below. I can’t take credit for discovering methods demonstrated, but hope it will be useful to another to have a coherent description.

Via:

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Posted in APC Smart-UPS, Development, Hardware Development, Power User, UPS | Leave a Comment »

@b0rk (Julia Evans): SPF & DKIM records

Posted by jpluimers on 2023/07/17

A nice zine by @b0rk (Julia Evans) [Wayback/Archive.is] SPF & DKIM records

And a few days later [Archive] 🔎Julia Evans🔍 on Twitter: “… looks like a really nice way to learn about SPF/DKIM (h/t @CubicleApril) you send it an email and it walks you through everything the receiver does to verify the email …” / Twitter which referred to

[Wayback/Archive] Learn and Test DMARC.

Related:

Via: [Archive] 🔎Julia Evans🔍 on Twitter: “SPF & DKIM records …” / Twitter (the original got deleted as it had a [Archive] typo)

–jeroen

Posted in DNS, eMail, Internet, Power User, SocialMedia | Leave a Comment »

On repeat: “ask information only once”;  Eenmalige uitvraag – NORA Online

Posted by jpluimers on 2023/07/13

Since the SVB PGB site keeps violating the [Wayback/Archive] AP12: Eenmalige uitvraag – NORA Online principle, some more emphasis on it as the usefulness of the “ask information only once” principle is not limited to government sites or commercial sites providing services for the government.

The principle “ask information only once” is valid for any site and needs to be present at all times, especially in these situations:

  1. when an authentication token is expired and re-authentication is needed
  2. when checking if authentication might have been expired and a page refresh is done during that check

I wrote about 1. in SVB PGB and DigiD security suddenly logged you out every 15 minutes despite the count down counter indicating otherwise ( wrote it in March 2021, published it in December 2021 when I thought it had been sort of solved).

That was obnoxious and took a very long time to fix (despite the mandatory aspect of the “ask information only once” principle and me pushing for a quick resolving in [Archive.is] Jeroen Wiert Pluimers on Twitter: “Omdat de @SVB_PGB site hiermee een noodzakelijk NORA archictectuur principe schendt (je raakt bij de logoff/logon de informatie die je op de pagina aan het invullen bent kwijt): kan dit een hoge prirotieit krijgen? Zie: – …”).

In February 2022, I had enough energy to submit the final PGB administration parts to the SVB PGB site. I didn’t get logged out every few minutes for the first hour or so (that only happened after being authenticated more than one hour, then repeating every 15 minutes), but I bumped into 2: loosing a lot of data in an at first unpredictable manner.

An underlying thing is that despite the NORA rules to be mandatory there is no sanction for the SVB (or any other government organisation) to fix this: users have to use the site and take the burden in order to get their payments. Ruurd Pels highlighted in these two answers to my tweets: harsh, but hitting the nail on the head:

The problem is that every each period of 15 minutes session activity , when you submit a form (the whole flow is form based, where the amount of data per form varies: sometimes just a confirmation button, sometimes a full month of data containing the hours worked) you get an intermediate quickly flashing “Redirecting…” on your screen, then loose the data entered in that form:

  1. [Archive] Jeroen Wiert Pluimers on Twitter: “Het NORA principe wat @StOnSoftware een jaar geleden noemde wordt weer door het @SVB_PGB geschonden. Het duurde even om te reproduceren, maar je verliest ongeveer elke 15 minuten je ingevoerde data. 1/” / Twitter
  2. [Archive] Jeroen Wiert Pluimers on Twitter: “Wat je dan ziet tijdens de submit (Verder, Opslaan) is een kort “Redirecting…” scherm op een willekeurige plek in de flow …, …, … In dit voorbeeld verlies je een maand aan invulwerk en is alles weer leeg. 2/ …” / Twitter
    Declaratie insturen - empty declaration showing you just lost a month of input

    Declaratie insturen – empty declaration showing you just lost a month of input

  3. [Archive] Jeroen Wiert Pluimers on Twitter: “Vorig jaar werd je nog elke 15 minuten uitgelogd en was het nog erger, zie … 3/” / Twitter
  4. [Archive] Jeroen Wiert Pluimers on Twitter: “en … Dat probleem zorgde er voor dat ik maar sporadisch declaraties instuurde, maar nu met een hele stapel declaraties is het probleem op een subtielere wijze nog steeds aanwezig. 4/” / Twitter
  5. [Archive] Jeroen Wiert Pluimers on Twitter: “Kunnen jullie dit laten fixen? Dank alvast. 5/5” / Twitter

After more than an hour, I bumped into 1 again:

  1. [Archive] Jeroen Wiert Pluimers on Twitter: “Oh @SVB_PGB: die bug van uitloggen na een kwartier bestaat nog steeds (zie …). Kreeg ik net in een uur tijd 3 keer. Na inloggen kom je wel weer in de flow, maar de data die je daar hebt ingevuld is dan verdwenen. A/ CC @EefvanKoos” / Twitter
  2. [Archive] Jeroen Wiert Pluimers on Twitter: “@SVB_PGB @EefvanKoos Ik vermoed dat beide te maken hebben met de sessie-duur van de active authenticatie van @DigiDwebcare omdat je in beide gevallen het “Redirecting…” stukje heel kort ziet verschijnen ofwel in het form of bij DigiD login beide met verlies aan data. B/B” / Twitter

[Archive] Stephan Eggermont (@StOnSoftware) / Twitter quote retweeted my initial message at [Archive] Stephan Eggermont on Twitter: “🧵 NORA heeft een aantal hele duidelijke principes om de burger niet te frustreren. Niet twee keer naar hetzelfde vragen geldt ook als je een sessie time-out. Dan moet je dus al ingevulde gegevens bewaren” / Twitter, which translated is

🧵 NORA has a number of very clear principles in order not to frustrate citizens. Not asking for the same thing twice also applies if you time out a session. Then you have to save already entered data

An introduction about NORA is at Nederlandse Overheid Referentie Architectuur – Wikipedia:

Nederlandse Overheid Referentie Architectuur of NORA is het interoperabiliteitsraamwerk voor de Nederlandse overheid en vertaalt daartoe wetgeving, beleid en standaarden naar architectuurprincipes, beschrijvingen en modellen. Het is een beschrijving van uitgangspunten voor het inrichten van de informatiehuishouding van de Nederlandse overheid. NORA is relevant voor de uitvoering van alle publieke taken door publieke en private organisaties.

[Wayback/Archive] NORA: Nederlandse Overheid Referentie Architectuur – Bluefrog has a way easier “table of contents” to the principles than the NORA online site (note that some document numbers are intentionally not used):

DE TIEN BASISPRINCIPES VAN NORA

  1. [Wayback/Archive] BP01: Afnemers krijgen de dienstverlening waar ze behoefte aan hebben.
  2. [Wayback/Archive] BP02: Afnemers kunnen de dienst eenvoudig vinden.
  3. [Wayback/Archive] BP03: Afnemers hebben eenvoudig toegang tot de dienst.
  4. [Wayback/Archive] BP04: Afnemers ervaren uniformiteit in de dienstverlening door het gebruik van standaardoplossingen.
  5. [Wayback/Archive] BP05: Afnemers krijgen gerelateerde diensten gebundeld aangeboden.
  6. [Wayback/Archive] BP06: Afnemers hebben inzage in voor hen relevante informatie.
  7. [Wayback/Archive] BP07: Afnemers worden niet geconfronteerd met overbodige vragen.
  8. [Wayback/Archive] BP08: Afnemers kunnen erop vertrouwen dat informatie niet wordt misbruikt.
  9. [Wayback/Archive] BP09: Afnemers kunnen erop vertrouwen dat de dienstverlenerzich aan afspraken houdt.
  10. [Wayback/Archive] BP10: Afnemers kunnen input leveren over de dienstverlening.

DE 38 AFGELEIDE PRINCIPES

  1. [Wayback/Archive] AP01: Diensten zijn herbruikbaar
  2. [Wayback/Archive] AP02: Ontkoppelen met diensten
  3. [Wayback/Archive] AP03: Diensten vullen elkaar aan
  4. [Wayback/Archive] AP04: Positioneer de dienst
  5. [Wayback/Archive] AP05: Nauwkeurige dienstbeschrijving
  6. [Wayback/Archive] AP06: Gebruik standaard oplossingen
  7. [Wayback/Archive] AP07: Gebruik de landelijke bouwstenen
  8. [Wayback/Archive] AP08: Gebruik open standaarden
  9. [Wayback/Archive] AP09: Voorkeurskanaal internet
  10. [Wayback/Archive] AP10: Aanvullend kanaal
  11. [Wayback/Archive] AP11: Gelijkwaardig resultaat ongeacht kanaal
  12. [Wayback/Archive] AP12: Eenmalige uitvraag
  13. [Wayback/Archive] AP13: Bronregistraties zijn leidend
  14. [Wayback/Archive] AP14: Terugmelden aan bronhouder
  15. [Wayback/Archive] AP15: Doelbinding (AP)
  16. (AP16 is intentionally missing: merged into AP17)
  17. [Wayback/Archive] AP17: Informatie-objecten systematisch beschreven
  18. [Wayback/Archive] AP18: Ruimtelijke informatie via locatie
  19. [Wayback/Archive] AP19: Perspectief gebruiker
  20. [Wayback/Archive] AP20: Persoonlijke benadering
  21. [Wayback/Archive] AP21: Bundeling van diensten
  22. [Wayback/Archive] AP22: No wrong door
  23. [Wayback/Archive] AP23: Automatische dienstverlening
  24. [Wayback/Archive] AP24: Proactief aanbieden
  25. [Wayback/Archive] AP25: Transparante dienstverlening
  26. [Wayback/Archive] AP26: Afnemer heeft inzage
  27. [Wayback/Archive] AP27: Een verantwoordelijke organisatie
  28. [Wayback/Archive] AP28: Afspraken vastgelegd
  29. [Wayback/Archive] AP29: De dienstverlener voldoet aan de norm
  30. [Wayback/Archive] AP30: Verantwoording dienstlevering mogelijk
  31. [Wayback/Archive] AP31: PDCA-cyclus in besturing kwaliteit
  32. [Wayback/Archive] AP32: Sturing kwaliteit op het hoogste niveau
  33. [Wayback/Archive] AP33: Baseline kwaliteit diensten
  34. [Wayback/Archive] AP34: Verantwoording besturing kwaliteit
  35. (AP35 is intentionally missing: superseded by AP41)
  36. (AP36 is intentionally missing: superseded by AP41)
  37. (AP37 is intentionally missing: superseded by AP43)
  38. (AP38 is intentionally missing: superseded by AP43 and AP42)
  39. (AP39 is intentionally missing: superseded by AP42)
  40. [Wayback/Archive] AP40: Onweerlegbaarheid (principe)
  41. [Wayback/Archive] AP41: Beschikbaarheid
  42. [Wayback/Archive] AP42: Integriteit
  43. [Wayback/Archive] AP43: Vertrouwelijkheid (principe)
  44. [Wayback/Archive] AP44: Controleerbaarheid

The missing numbers (see also [Wayback/Archive] Betrouwbaarheid – NORA Online, [Wayback/Archive] Vervangen of Vervallen elementen in NORA – NORA Online and [Wayback/Archive] Vervangen of Vervallen uitspraken in NORA – NORA Online):

For a management overview, see [Wayback/Archive] NORA (Nederlandse Overheid Referentie Architectuur) – Digitale Overheid.

–jeroen

Posted in Authentication, Development, DigiD, Power User, Security, Software Development, Web Development | Leave a Comment »

Looking for maintainer(s) for fritzcap (Python project that captures calls from a Fritz!Box)

Posted by jpluimers on 2023/07/12

Given my health uncertainty, I am looking for maintainers for the fritzcap project (it captures calls from a Fritz!Box modem/router and is written in Python).

History

The fritzcap project was originally started in2007 by [Wayback/Archive] spongebob | IP Phone Forum, first as a binary fritzcap.exe Windows executable (see his first post at [Wayback/Archive] FritzBox: Tool für Etherreal Trace und Audiodaten-Extraktion | IP Phone Forum). In 2010 it became an open source Python project at [Wayback/Archive] Google Code Archive – Long-term storage for Google Code Project Hosting.

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Posted in About, Audio, Cloud, Communications Development, Containers, Development, Docker, ffmpeg, Fritz!, Fritz!Box, fritzcap, Hardware, HTTP, Infrastructure, Internet protocol suite, Media, Network-and-equipment, Personal, Power User, Python, Scripting, Software Development, TCP | Leave a Comment »

Figuring out the open network connections for processes ran by python

Posted by jpluimers on 2023/07/11

TL;DR:

pidof python | tr " " "\n" | xargs -r -n 1 lsof -i -a -e /run/user/1001/gvfs -p

Breakdown:

  • Getting the process IDs of any python process using pidof (most of my systems do not have pgrep installed):
    # pidof python
26128 12583
  • Given the above list is space separated, and xargs prefers line separated, lets replace spaces with newlines (I showed this before in Source: firewalld: show interfaces with their zone details and show zones in use):
    # pidof python | tr " " "\n"
26128
12583
  • By default, xargs squashes all input on one line:
    # pidof python | tr " " "\n" | xargs echo
26128 12583
  • To work around that, you can either use the -L 1 or -n 1 argument to keep them on separate lines:
    # pidof python | tr " " "\n" | xargs -L 1 echo
26128
12583
# pidof python | tr " " "\n" | xargs -n 1 echo
26128
12583
  • Now lsof can not only show open files, but also IP sockets (-i), and *only* those (-a), for a specific process ID (-p #). So by having the -p as last argument, xargs will append the process ID after it:
    # pidof python | tr " " "\n" | xargs -n 1 lsof -i -a -p
lsof: WARNING: can't stat() fuse.gvfsd-fuse file system /run/user/1001/gvfs
      Output information may be incomplete.
lsof: WARNING: can't stat() fuse.gvfsd-fuse file system /run/user/1001/gvfs
      Output information may be incomplete.
COMMAND   PID    USER   FD   TYPE  DEVICE SIZE/OFF NODE NAME
python  12583 jeroenp    7u  IPv4 8347396      0t0  TCP 192.168.124.38:54576->192.168.124.23:1012 (ESTABLISHED)
python  12583 jeroenp    8u  IPv4 8345460      0t0  TCP 192.168.124.38:48250->192.168.124.23:http (CLOSE_WAIT)
  • The lsof: WARNING: can't stat() fuse.gvfsd-fuse file system /run/user/1001/gvfs is a warning not easy to workaround in a short manner as per [Wayback/Archive] privileges – lsof: WARNING: can’t stat() fuse.gvfsd-fuse file system – Unix & Linux Stack Exchange (thanks [Wayback/Archive] pabouk  and [Wayback/Archive] jmunsch):

    In your case lsof does not need to check the GVFS file systems so you can exclude the stat() calls on them using the -e option (or you can just ignore the waring):

    lsof -e /run/user/1000/gvfs

    (via: [Wayback/Archive] lsof: WARNING: can’t stat() fuse.gvfsd-fuse file system /run/user/1001/gvfs – Google Search)

    So you get this:

    # pidof python | tr " " "\n" | xargs -n 1 lsof -i -a -e /run/user/1001/gvfs -p
COMMAND   PID    USER   FD   TYPE  DEVICE SIZE/OFF NODE NAME
python  12583 jeroenp    7u  IPv4 8347396      0t0  TCP 192.168.124.38:54576->192.168.124.23:1012 (ESTABLISHED)
python  12583 jeroenp    8u  IPv4 8345460      0t0  TCP 192.168.124.38:48250->192.168.124.23:http (CLOSE_WAIT)
  • When there are no process IDs, you do not want to run lsof, and xargs has an argument just for that: -r, see my earlier post Source: -r argument to pipe (no argument for MacOS)- If no input is given to xargs, don’t let xargs run the utility – Unix & Linux Stack Exchange, so you get this
    # pidof python | tr " " "\n" | xargs -r -n 1 lsof -i -a -e /run/user/1001/gvfs -p

Via:

–jeroen

Posted in *nix, *nix-tools, bash, bash, Development, lsof, Power User, Scripting, Software Development, xargs | Leave a Comment »

how do I merge the tabs of two open Preview windows if I have more than two open? – Ask Different

Posted by jpluimers on 2023/07/10

That was more difficult than I anticipated: [Wayback/Archive] how do I merge the tabs of two open Preview windows if I have more than two open? – Ask Different

First of all, make sure that the “tab bar” is displayed by choosing “view”->”Show Tab Bar”. Then, you should be seeing the tab bar, which displays the file name:
enter image description here
Then, in the other preview window, click and hold the tab bar, and drag it onto the tab bar of the target preview window. Using this method, you can merge as many tabs as you want.
Tested on MacOS Catalina 10.15.4

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Posted in Apple, Mac OS X / OS X / MacOS, macOS 10.12 Sierra, macOS 10.13 High Sierra, Power User, Uncategorized | Leave a Comment »

NeverSSL – helping you get online on WiFi networks requiring authentication

Posted by jpluimers on 2023/07/07

[Wayback/Archive] NeverSSL – helping you get online.

What?

This website is for when you try to open Facebook, Google, Amazon, etc on a wifi network, and nothing happens. Type “http://neverssl.com” into your browser’s url bar, and you’ll be able to log on.

How?

neverssl.com will never use SSL (also known as TLS). No encryption, no strong authentication, no HSTS, no HTTP/2.0, just plain old unencrypted HTTP and forever stuck in the dark ages of internet security.

While writing it in 2022, the site would redirect me to http://oldserenewonderousbirds.neverssl.com/online, http://beautifulgrandoldspell.neverssl.com/online and http://majesticsilveroldeclipse.neverssl.com/online, which will change probably each time to deter DNS caching, as per this message when I disabled JavaScript:

⚠️ JavaScript appears to be disabled. NeverSSL’s cache-busting works better if you enable JavaScript for neverssl.com.

Why NeverSSL

Because NeverSSL always uses plain unencrypted HTTP traffic, any captive portal WiFi or wired network can easily sneak in or redirect to authentication.

That way you can logon, after which you can use encrypted HTTPS/SSL/TLS/HSTS traffic.

Via

DNS hijacking can be used too

Leading to the above was this post by b0rk: [Wayback/Archive] how airports lie to you with DNS.

Via:

–jeroen

Posted in Captive-WiFi-Portal, Power User, WiFi | Leave a Comment »

How To Use Twitter Search – Advanced Guide by @Luca – Fresh van Root

Posted by jpluimers on 2023/07/07

Need to check out which of these filters still work:

[Wayback/Archive] How To Use Twitter Search – Advanced Guide by @Luca – Fresh van Root

Operator Description
since:2019-05-06 Tweets published at or after the date. (UTC +0)
until:2019-05-07 Tweets published before the date. (UTC +0)
from:Luca Tweets that are not marked as sensitive media. Tweets published by a specific user.
to:Luca Replies and mentions for a specific user.
lang:de Tweets in a specific language. Language is detected by Twitter on a Tweet basis. “und” for Tweets where Twitter was unable to determine a language.
near:Berlin within:5km [unreliable] Tweets that were posted in specific locations and optionally within a certain range.
min_faves:5 Tweets with at least that amount of faves.
-min_faves:100 Tweets that have fewer faves than specified.
min_retweets:10 Tweets that were at least retweeted that many times.
-min_retweets:3 Tweets that were retweeted less than that many times
min_replies:70 Tweets that got a minimum amount of replies.
-min_replies:8 Tweets that got fewer replies. (max_replies does not work)
filter:follows Tweets by accounts you follow.
list:Luca/Science Tweets by accounts on a specified list.
filter:verified Tweets by verified accounts.
filter:images Tweets with an image.
filter:links Tweets with an URL.
filter:media Tweets with a video or a photo.
filter:retweets [only works with the API or with “include:nativeretweets”] Retweets.
filter:quote Tweets that contain a quoted Tweet.
filter:replies Tweets that are a reply.
filter:mentions Tweets that mention a user.
filter:videos Tweets that contain a video.
filter:native_video Tweets that contain a video, that was directly uploaded to Twitter.
filter:news [unreliable] Tweets that contain a URL to a news source.
filter:safe [unreliable] Tweets that do not contain sensitive material.
include:nativeretweets It allows you to search through retweets as well. Especially useful in combination with from:account or filter:follows.

–jeroen

Posted in Power User, SocialMedia, Twitter | Leave a Comment »

An unexpected turn of events when Jeff Geerling posted “I’m hosting my website on a FARM!”

Posted by jpluimers on 2023/07/06

Some links on the unexpected turn of events after [Archive] Jeff Geerling (@geerlingguy) / Twitter posted

First his site got more traffic because of the post, then within an hour traffic exploded because of a DDoS overflowing both his Raspberry Pi cluster and his mobile data capacity.

Jeff will likely do blog posts on these and update the underlying GitHub repository at [Wayback/Archive] geerlingguy/turing-pi-2-cluster: Turing Pi 2 Cluster , but until then (since his Tweets were not threaded), this is what happened on 20220209 as it taught me a few bits:

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Posted in Cloud, Cloudflare, Containers, Development, Docker, Hardware Development, Infrastructure, Internet, Kubernetes (k8n), LifeHacker, OpenSpeedTest, Power User, Raspberry Pi, SpeedTest | Leave a Comment »

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