Retro computing enthusiast.
Avatar taken from: https://en.wikipedia.org/wiki/Cyrix\_Cx486#/media/File:Cyrix\_Cx486DX4.jpg
Oh, I didn’t want to suggest that there is no value in using a reverse-proxy, there certainly is. Just don’t expect it to do anything for you in terms of application security. The application behind it is just as exposed as it would be without a proxy. So if there was a security flaw in that application, the reverse-proxy does not help at all.
I am not sure where this idea comes from, but putting a service behind a reverse-proxy does not increase its security in any way, unless you’d do authentication right at the reverse-proxy.
No, even the earliest Ryzens support ECC reporting just fine, given the motherboard used supports it, which many boards do. Only the non-Pro APUs do not support ECC.
Did anyone manage to build this? It seems something is missing, or I am doing something wrong. The build fails due to missing symbols for me. Also, interestingly the assembler complained about one line in a certain file being too long. Fortunately that lines was just a comment, so it was easy to fix that.
Matrix also does have a pretty big problem with meta data. By default it stores a ton of meta data (at least the reference server implementation does) and I am not sure if this is even a solvable problem without redesigning the protocol. When opting for an alternative to Signal, XMPP is probably the better choice.
You were talking about adversaries discovering the backdoor. That’s something entirely different from compromised keys. So your sacrasm is quite misplaced here.
In order to successfully implement a backdoor, you need to ensure that you are more clever than your adversaries, because those same backdoors can be used against you.
In this instance, that’s not the case. Only those in possession of the right key can use the backdoor. Also, discovering infected systems from the outside, appears to be impossible - the backdoor simply does not do anything to reveal itself if you don’t have the key.
Sure, cloud services can get quite expensive and I agree that using used hardware for self-hosting - if it is at least somewhat modern - is a viable option.
I just wanted to make sure, the actual cost is understood. I find it rather helpful to calculate this for my systems in use. Sometimes it can actually make sense to replace some old hardware with newer stuff, simply because of the electricity cost savings of using newer hardware.
Well, what they are stating is obviously wrong then. No need to use some website for that anyway, since it is so easy to calculate yourself.
Before anyone loses their minds, imagine you get the i3-8300T model that will peak at 25W, that’s about 0.375$ a month to run the thing assuming a constant 100% load that you’ll never have.
Not sure how you came to that conclusion, but even in places with very cheap electricity, it does not even come close to your claimed $0.375 per month. At 25 W you would obviously consume about 18 kWh per month. Assuming $0.10/kWh you’d pay $1.80/month. In Europe you can easily pay $0.30/kWh, so you would already pay more than $5 per month or $60 per year.
Awesome project. Thanks for sharing.
Lots of answers about use-cases of additional wifi networks, so I won’t go into that. I haven’t seen the downsides mentioned here, though. While technically you can run lots of wifi networks of off the same wifi router/ap, each SSID takes a bit of air time to broadcast. While this might sound rather insignificant since this is only a rather tiny bit of information transmitted, it is actually more significant than one might expect. For one the SSIDs are broadcast quite often, but also they are always transmitted at the lowest possible speed (meaning they require a lot more airtime than normal WiFi traffic would require for the same amount of data) for compatibility reasons. This is also the reason why it is a good idea to disable older wifi standards if not needed by legacy clients (such as 54 Mbit/s 802.11G wifi).
Having two networks is usually fine and doesn’t cause noticable performance degradation, having 4 or more networks is usually noticable, particularily in an already crowded area with lots of wifi networks.
For many li-ion laptop batteries, the manufacturer’s configuration of a 100 % charge is pretty much equivalent to overcharging. I’ve seen many laptops over the years with swollen batteries, almost all of them had been plugged in all the time, with the battery kept at 100 % charge.
As an electrical engineer you should know that technically there is no 100 % charge for batteries. A battery can more or less safely be charged up to to a certain voltage. The 100 % charge point is something the manufacturer can choose (of course within limits depending on cell chemistry). A manufacturer can choose a higher cell voltage than another to gain a little more capacity, at the cost of longterm reliability. There are manufacturers that choose a cell voltage of 4250 mV and while that’s possible and works okay if charged only occasionally, if plugged in all the time, this pretty much ensures killing the batteries rather quickly. I would certainly call that overcharging.
Since you already mentioned charging thresholds, I just want to say, anyone considering using a laptop as a server should absolutely make use of this feature and limit the maximum charge.
Great photos!
When it comes to privacy (and also security), using a router provided by the cable company is a concern, because that router can see and access all devices on your local network and you can’t be sure that security issues are patched in a timely fashion if ever… Using a modem provided by the cable company on the other hand is not much of an issue, because you have to trust the company anyway, when it comes to your traffic to/from the Internet. These days most of the Internet traffic is encrypted (except DNS, which is often still unencrypted), so that is not a big deal. Of course there can be other reasons to use a different modem.
In either case, it makes sense to switch to a non-ISP DNS server, preferably an encrypted one (DNS-over-TLS or DNS-over-HTTPS), so the ISP can’t see which websites you are accessing.
Ich kann dir zu der Nabe keine Tipps geben, aber Einspeichen ist privat absolut machbar und auch nicht besonders schwierig. Es ist hauptsächlich Fleißarbeit. Außer einem Speichenspanner braucht man dazu keine weiteren Werkzeuge. Zentrieren kann man nach Gehör (oder mit einer Smartphone App die die Frequenz messen kann) machen, indem man die Speiche wie eine Saite anschlägt um einen Ton zu erzeugen. So kann man leicht sicherstellen, dass alle Speichen gleichmäßig angezogen sind.
Compared to other SBCs, Raspberry Pis have been pretty inefficient for a while. A Pi 5 idles at about 3 W, which is pretty terrible for such a board, compared to other similar devices. You can get X86 PCs that idle at 3 W which are way more powerful. Other ARM SBCs use less than half that at idle and similarly less under load.
There are probably multiple reasons for that. The Pi’s SoCs have always used rather old process nodes, which are more power hungry than more modern ones used by other single board computers and PCs - 16 nm for the Pi 5 SoC and 28 nm for the Pi 4. Also, with the Pi 5 there is this additional “south bridge” chip which is attached via PCIe. This consumes additional power and for some reason the PCIe link is configured such that it never enters power saving states. I don’t know why.
Also, the power supply circuitry on the Pi 5 is far from ideal with its 5 V / 5 A power supply. Such a low voltage at such a high current can easily cause additional losses on the wire. That’s mostly relevant under high load though.
While you can do that, you should be aware of the security implications (every application can see and modify every other application’s cookies). If at all possible, I would try to avoid this setup.