Connection to two providers in order to speed up. How to implement a traffic connection?

Question

Computer networks

There is a Windows client OS.
There is a connection to an ADSL provider and a connection to a 4G provider.
The Internet has its own server with a FreeBSD/Linux server OS to taste.
The communication channel on the FreeBSD/Linux server is thick, obviously better than what the providers give me where the Windows client OS is.
Is it possible to somehow programmatically combine traffic (on the server) and send traffic from the server to the client via two channels at once (via ADSL and 4G at the same time) for the sake of speed?
Of course, assuming that this server of mine will be of the proxy / NAT / router / "traffic combiner" type.
So that I can eventually use the Internet at a higher speed.
Something like this
https://habr.com/company/mailru/blog/332950/

spoiler

Not necessarily a VPN, not necessarily with an intermediate "transport computer".
www.vrayo.com/vtrunkd

Before

After

Answer 1

Look in the direction of channel aggregation, if adsl and 4G are on the same piece of hardware, if on different ones, then nothing will come of it, unless it is possible to combine it into one virtual one (with Windows and a router, for example, this will not work). On Windows, if you only look for a third-party solution, on Linux it’s much easier:
google for the keywords lacp, bonding, teaming
But with a 4G channel there will be a lot of nuances with jitter, stability, etc., so it’s a so-so idea for selling :)

Answer 2

It doesn't work like that.

Answer 3

Ethernet Bonding is what you need, you can do it even on Windows kerio supported it in shaggy years.
Well, you need to understand that when aggregating channels, you will have several difficulties.
1. ADSL - here you will have, for example, PPPoE, in particular, PADI PADO works in a broadcaster, and you will have problems with the fact that modems are not physically able to select the channel to which to connect
2. With an increase in speed, you will NOT be able to increase the download speed of one file, it will go through one channel, but the second file can go in parallel.

Answer 4

No way. Such tasks in windows are not solved, and not only in windows.

Answer 5

for a proxy, you can register uplinks , for example , then it will knock on them.
quite often there are options with bonding VPN channels, but they are usually also done to increase the stability of the channel.
the bond has modes 5 and 6 with balancing.
I haven't tried speed folding.