What is the best way to organize remote access (full) to several machines via the Internet (possibly KVM-over-ip)?

Question

Iron

There are more than a few (more than one) computers located in city A, I want to get full remote access to them from city B.

Of course, in this scenario, the obvious solution would be to use VNC / TeamViewer / RDP, etc. But there is a problem: due to the fact that I rarely go to city A, there is a risk that I may lose access to the car. Also, I can't perform some low-level operations such as working with the BIOS and reinstalling the OS (perhaps this can be done remotely, but I would not risk losing access).

Therefore, I would like to see a lower-level solution that works "outside" the OS. And (as far as I can tell) there are such solutions. KVM-over-ip - (correct me if I'm wrong) this is a kind of "extension" of the video signal and input devices (+ some other features).Where KVM is "keyboard, video and mouse" and not "Kernel-based Virtual Machine" That is, it is some device that "pretends" to be a monitor, mouse and keyboard, the system unit connects to it and it allows you to broadcast signals over the Internet. An example of such a device (to which I am leaning so far): https://www.kvm-switches-online.com/dkx4-101.html

This solution suits me almost perfectly, but there is one BUTwhich I don't fully understand how to solve. The device in the link has ports for 1 machine. And I have several of them (so far 2, but this may change). The obvious solution is to buy one device per car. But here the price kicks in. Another obvious solution is to buy a device that can connect to 2 or more machines, here the price also starts to bite sharply, plus in the bulk there is a jump from 1 to 4 devices, which is still redundant for me.

At the same time, as far as I understand, the price of this device consists primarily of iron for encoding and signal transmission. There are also devices of the KVM-switch class (without "-over-ip"), they are a simple (relatively) splitter switch. That is, 2 machines and 1 control interface are connected to them, and by clicking the switch you can choose which machine to control. Such things are sometimes used for one machine, but with virtualization (when one monitor + GPU Passthrough). And so the price of such piece of iron - is much lower.

In my situation, I don't need to be able to access my machines at the same time (not yet at least). So, the option using 1 KVM-over-ip class device per 1 port + 1 KVM-switch class device would suit me. And ideally if it was in one box. At the same time, the price of such a device should tend to (the price of KVM-over-ip (say $500) + KVM-switch (say $100) + some kind of premium (say 10%)) = $600-$700, but what I have seen so far goes sharply into the enterprise and the price doubles. I believe that this is because devices on many machines allow you to have simultaneous access, which imposes large requirements on hardware, but I don’t really need it.

Additionally:
- we are talking not only about "servers", but also about ordinary PCs
- you definitely need graphical access, only a console, not very suitable, because you want to run graphic software
- there is some budget (say, up to $ 1000), but you don’t really want to overpay for something you don’t need
- at the same time you want some not very expensive scalability. That is, it is acceptable to pay $100-$200 extra to add one more car to the zoo. But I don’t want to get into a situation where, when adding a machine, I have to throw away (figuratively) a device bought for $1000 and buy a new one for $2000
- I’m very attracted to additional features, such as emulation of flash drives, USB forwarding, power management (remote on / off PC)
- any feedback / experience of configuring a similar system is also interesting (including feedback on specific hardware / software)

Answer 1

Previously, I used such a bunch of one KVM over IP DKVM-IP1 dlink.ru/ru/products/3/584.html and it was plugged into a regular large KVM for 10 devices, also in my D-link. We connected via the web to IP KVM and switched screens with hot keys from the console on the large KVM.

Answer 2

More or less new Intel processors have vPRO to connect to the machine via VNC at the Bios level.
AMD also has it, it is somehow called differently.

Answer 3

There are also ports on 8/16/32
https://www.kvm-switches-online.com/ip-1602.html

Answer 4

Full remote access is expensive anyway.
But in fact - in most cases it is simply not needed in practice.
There is no need to change anything in a normally configured BIOS remotely.
Everything else is handled by software.
Reinstalling the OS remotely is not a problem, and it is not necessary to have low-level remote access to do so.
VNC or a teamviewer is enough.
And where it is really needed - well, as a rule, in such cases, utility justifies the price.