How to increase the number of concurrent TCP connections?

Question

Windows

Hello.
Given:
a laptop with windows 10.
software that makes 1000+ connections simultaneously through a proxy server
Task:
It is necessary to increase the number of simultaneous TCP connections.
In theory, there should not be any restriction, but in fact it is and the system does not allow more than 500 connections.
Thank you.

Answer 1

try provider
from hosting

Answer 2

Previously, Windows had a restriction, now it seems to have been removed, here is the discussion: answers.microsoft.com/ru-ru/windows/forum/windows_...
So this is a router or provider.

Answer 3

The program I need refuses to work on the server, even if it has windows 7.