Remote
I like computering. Threat Intel at Crowdstrike.
This is a professional account. Used to play a lot of CTF with @EatSleepPwnRpt and @StratumAuhuur
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Joined November 07, 2022
Location:
Aachen, Germany
Posts
That unsettling feeling when you are not at home and your self-hosted services aren't available anymore.
After checking out the infrastructure, I discovered that my whole rack went down and everything in it rebooted: Fileserver, auxiliary smart home nodes, core switch and core router. But all of it just rebooted, it wasn't off for long periods of time.
It cannot be the fuse or RCD, these wouldn't reset themselves, so it must be something else. I restarted all my services and started digging for the cause. First hunch: the UPS.
I know that the UPS battery is pretty much fucked, but I thought I could get by just a bit longer before ordering a new one. After checking the manual, I found out that this particular Eaton UPS does a battery test every week. Hmm...
So I checked my power usage metrics for the rack on my Grafana. Turns out every week at the exact time when the devices rebooted last night, the current on the outlet drops from 1A to ~110mA. This must be the battery test.
So my current hunch: The battery is so fucked, that the testing procedure makes the line voltage drop so far that everything rebooted. Time to order a new one, I guess. And I can sleep again now, knowing that my house won't burn down in the next few days until I'm back home. Also I should hook up that USB port of the UPS to at least one of my nodes :D
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Replying to
@23n27@dgc.social
@23n27@dgc.social "What protocols should the new RF Transceiver we are going to release support?" - "Yes."
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This year's balls-of-steel-award definitely goes out to the dude on Leipzig apron who kicked the kamikaze drone loaded with military explosives down to the ground in front of the Antovov.
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Ich raste aus, wenn ich noch ein mal das Wort "Stromer", als Begriff für ein Elektroauto, irgendwo lesen muss, dass sich zu hundert Prozent wieder irgendson Boomer mit Klapphandyhülle ausgedacht hat, WEIL DAS JA SO WITZIG IST!!1?1?1 HAAAHAAA. "Stromer! VERSTEHSTE!? WEGEN STROM UND SO UND ABER EIGENTLICH AUCH LANDSTREICHER. STROMERAUTO!!!!1!1!1cos(0)sin(pi/2) HAHAHA!"
Infantile Scheiße.
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Replying to
@azonenberg@ioc.exchange
@azonenberg@ioc.exchange Gouda? What are you probing? Cheese?
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Not to pat myself too much on the back, but the whole KNX framework that I have by now is just so awesome. I mean I spent a lot of time getting the Rust type system to do what I wanted it to do. Doing that pays off, everything just fits together really well.
Off to starting a client library to talk to devices from a full-blown host for management purposes. I need to cook! And fuck the ETS!
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Wait, at first I thought the AI exclusion on Codeberg is silly, but it's actually quite cool: It's fresh, untainted training data for new LLMs!
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I don't know why, but I felt the urge to eat cake. I did a Woodruff-Raspberry-Cake yesterday and it's very edible.
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@azonenberg@ioc.exchange
@azonenberg@ioc.exchange @tom_verbeure@mastodon.social HiDPI, HDR, variable refresh rates, fractional scaling, different scaling factors on different monitors with different pixel densities. All new features that didn't exist 20 years ago and I use all of them.
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@tom_verbeure@mastodon.social
@tom_verbeure@mastodon.social It's a more modern architecture that aligns better with how modern GPUs work. X11 is from the 80s and modern concepts have just constantly been piled up on top of an old architecture. By now even the Xorg developers themselves only do maintenance anymore and don't add new features. There's Xlibre, but well...
It's not that you benefit immediately from it as a user. It's plumbing. But everyone is moving away from X11. Asahi Linux for example doesn't even bother supporting it on ARM Macs. They tried, saw it was too hacky and moved on to exclusive Wayland support.
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KiCAD just ignoring Wayland has made it unusable in version 10. The 3D viewer just crashes, copying requires hammering CTRL+C until stuff is copied, repeated key input by holding a keyboard button just stops. It's extremely bad right now.
Let's see how long they can ignore Wayland until just every distribution moved away from X11.
edit: What I mean by "ignore": https://www.kicad.org/blog/2025/06/KiCad-and-Wayland-Support/
edit2: Launching it with QT_QPA_PLATFORM=xcb seems to at least solve the constant crashing 🤞
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Mentour Pilot now does general non-aviation related desaster videos. I just found the Fukushima video.
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Night time rumble 😍
YouTube's video recommendations are on point again.
https://www.youtube.com/watch?v=du7aTjQ13nA
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Replying to
on social.troll.academy
@twomikecharlie@social.troll.academy @clonejo@social.troll.academy Musst du nicht mitlerweile auch die 11kW auf 4,2kW auf Zuruf des Netzbetreibers drosseln können? Mich juckt das nicht, weil ich das alles vor diesem Gesetzt gemacht habe. Nichtmal meine PV wird extern gedrosselt. Bestandsschutz! Yay!
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I just left the heat pump running in cooling mode during the day for the last few weeks. Seems we slowly got rid of all the heat stored in the house and it just stays at 22-23°C now. The whole system has just so much inertia that it takes a while for things to happen. Same in autumn when we start heating. It always takes a few days until the temperature settles. Let's see what happens during the next few days when it gets warm again.
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Replying to
@ulldma@infosec.exchange
@ulldma@infosec.exchange Geil, mehr Futter für die TikTok-Klapphandy-Boomer! Ich kann die 3000 neuen AI-Songs über Dicky den gut bestückten Wal in der Wismarer Bucht kaum erwarten.
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TIL: The Duplo play house we all had as kids exists in a massive two-story version.
https://www.bricklink.com/v2/catalog/catalogitem.page?S=9152-1
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Funny how DigiKey delivers solder paste in a cooling bag to me and how I, after arrival, just put the whole thing uncooled on a shelf for 5-10 years until it's empty. Also the datasheet talks about a shelf life of 1 year. Weird.
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@jerry@infosec.exchange
@jerry@infosec.exchange That means I can continue watching the show and still enjoy the books afterwards because they are different? I started watching and then bought the books, stopped watching the series to not spoil me, but never really found time to actually sit down and read the books except on longer train rides or flights. It takes a while to get through that way...
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Replying to
@tom_verbeure@mastodon.social
@tom_verbeure@mastodon.social I really need to attend the flea markets you find this stuff on. It's unthinkable to even find this kind of gear even on eBay for sane prices here in Germany, it's wild.
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Replying to
@23n27@dgc.social
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The whole bulk 3€ customs fee per item group story that the EU now enforces on foreign packages makes me extremely angry. This essentially kills hobby electronics.
I haven't ordered at Mouser or DigiKey in a while and I don't know how they are affected right now, but still: The whole idea is so fucking braindead. Instead of just getting rid of the 150€ customs free limit, they do this. I now have to make sure to order more than 150€ to get to pay "proper" customs fees which are 0% on electronic parts. And then hope that the seller doesn't split packages up. If they do, you pay 3€ bulk PER ITEM GROUP. As I said: 100% braindead.
You know what? Fuck the EU! I hate this club more every day for a while now. Shit like enforcing USB-C as a charging standard does not alleviate this, the lobbyism, corruption and surveillance phantasies.
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The whole story with the bulk 3€ customs fee per item group story that the EU now enforces on foreign packages makes me extremely angry. This essentially kills hobby electronics.
I haven't ordered at Mouser or DigiKey in a while and I don't know how they are affected right now, but still: The whole idea is so fucking braindead. Instead of just getting rid of the 150€ customs free limit, they do this.
You know what? Fuck the EU! I hate this club more every day for a while now. Shit like enforcing USB-C as a charging standard does not alleviate this, the lobbyism, corruption and surveillance phantasies.
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Got my hands on the KNX EITT today: The official conformance testing suite used by device manufacturers and test labs with the harness and the test definitions. I already had the tests itself without the runner in a version from 2019 and which are part of the standard documents in PDF form. This is what I reimplemented with my own runner to already test the stack with patches applied to tests here and there because of reasons.
How I got this today is a story over a beer at $conference. I don't even think this approach was strictly illegal. Let's say it got published voluntarily and you just have to find it there.
now I need to prepare zweidraehte to run this against and see how much I actually stick to the standard.
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Thought I'd check out the world cup finale. I had to quit watching that half time show. Cringe.
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Replying to
@cccpresser@chaos.social
@cccpresser@chaos.social Aus reiner Neugierde: In welcher Software hast du das gemacht?
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Thank you, Linux. By enabling this handler to emulate a pre-ARMv6 SWP{B} instruction, I can run my old armv5 binaries on a modern aarch64 system, but even with the rate limit, you are hammering my logs with this message. Who thought this would be a good idea? I cannot recompile these binaries, because I don't have the source code...
It took a Fable session to find out what even happens, because before enabling that by writing 1 into /proc/sys/abi/swp everything would just get killed with a SIGILL.
I also cannot use qemu-arm and binfmt_misc, because I need custom ioctls towards a custom kernel driver which aren't handled properly in the qemu usermode translation. Great!
https://github.com/torvalds/linux/blob/master/arch/arm64/kernel/armv8_deprecated.c#L218C2-L219
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Replying to
@q3k@social.hackerspace.pl
@q3k@social.hackerspace.pl You are dealing with a bunch of cultural philistines.
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Replying to
@q3k@social.hackerspace.pl
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Cameraman understood the assignment. And the music isn't bad either.
https://www.youtube.com/watch?v=hallruPYFKY
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Nächste Woche durchgehend 20°C... Was ist das? Wintereinbruch?
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https://www.youtube.com/watch?v=dQNGQ6HWlSc
OR: "Wenn Jens Spahn nicht ins Gefängnis geht, darf ich DIY Split Klima machen."
Dies.
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Ich hab da ja son Hobby: Ich guck mir liebend gerne Spinner auf YouTube an. Hab grade neues Material gefunden. Köstlich!
/cc @greg@infosec.exchange
https://www.youtube.com/watch?v=bI5RhpMmrBE
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🎶 Jede Zelle meines LiPos ist glücklich. Jede Akkuzelle fühlt sich wohl. 🎶
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That Iran war is kinda boring at this stage, ngl. Blockade, no blockade, blockade, no blockade. You need to come up with something new to make it exciting enough to forget about the Epstein files, my dude!
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As promised, I just made my KNX device stack public: https://github.com/ntrnnr/zweidraehte
It's still not 100% done, but you can create TP1, IP and RF devices with and without KNX Data Secure. ETS product database generation is also included.
I'll keep working on it! But now you can play around with it as well.
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If that's how the European Union thinks it should work, I'll simply not support it anymore. It's that easy.
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Replying to
@janamarie@mystical.garden
@janamarie@mystical.garden @23n27@dgc.social Wait, that's a thing? I thought I was joking.
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Replying to
on dgc.social
@23n27@dgc.social @janamarie@mystical.garden Hundertwasserindustrieanlage
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Replying to
@tihmstar@infosec.exchange
@tihmstar@infosec.exchange Yes, but it's not my code. I just needed to compile something.
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Got some Fable usage credits left until it vanishes. Tried having it reverse engineer some stuff. Useless. Any message that does something even remotely reverse engineering related is INSTANTLY flagged and it reverts back to Opus. Bleh.
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Fucking protobuf and abseil. It NEVER builds, it's always broken. What a load of bullshit.
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Der amtierende Schweizer Umweltminister heißt Albert Rösti. Das ist in zweierlei Hinsicht witzig.
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Replying to
@oilheap@infosec.exchange
@oilheap@infosec.exchange Can't leave me hanging here guessing what this device is!
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Just got the idea to let Fable loose on this bug that I still haven't found the cause of and just 100% lost interest at fixing in the mean time. Let's see how much it manages to debug. Zero effort and fucks given at this point.
https://github.com/NationalSecurityAgency/ghidra/issues/6747
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Replying to
@G33KatWork@infosec.exchange
I think it's pretty stupid to sell such a car to a collector instead of doing what it was built for: Driving races with it.
I would hate seeing it being stored in some huge garage full with other "collectibles" standing itself to death.
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