How to set up a proxy in ubuntu as a proxy for windows 1s?

Question

linux

Kotany, then it costs 1c on windows, it needs 5 connections to the proxy (each has its own ip)
The plan is this:
There is a remote server, which will be this proxy.
5 virtual network cards are introduced there, each with its own external ip.
There is an Ubuntu 20.04 server there (in principle, I can stick anything)
In what not too complicated way can you configure several proxies so that you can put it in the 1s config?
I set up shadowsock, it works, but somehow I broke my teeth about the settings, I can’t catch up with how to make another connection, and it’s not clear how to set up 1s - there is no login. I went to look for what 1s generally works with - apparently, I don’t understand something at all, because I didn’t find anything (obviously, I wasn’t looking for it.)
Previously, there was a successful experience of setting up OpenVPN, in theory, you probably need to hang another authorization center on another port and re-generate certificates, create five network cards on a windows server, etc..., or something like that.

Please give the correct vector of work, who had a similar experience.

UPD: Raised WireGuard

Answer 1

I'm even afraid to imagine why 1s needed to access the Internet through a proxy ...
As far as I remember 1s, there are ways to connect to the network in the thick client, there is a proxy
You can raise 5 OVPN clients, and wrap them by name to the desired external IP

Answer 2

Any proxy can use a specific outgoing interface. 5 proxies on different ports with different outgoing interfaces.