How to make a local web server from under NAT available on the Internet?

Question

IIS

"Local web server under NAT" means that the machine on which the server is connected to the Internet through NAT, i.e. it does not have a dedicated IP and by default the provider filters all incoming connections.
The first thing that comes to mind is Opera Unite + Web Proxy , but the problem is that Web Proxy does not proxy COOKIES.
The second thing that came to mind I outlined in the article , but there is also a problem with cookies.
Can someone please suggest a working solution.
Thanks!!!
UPD: we managed to solve the problem with cookies in Opera Unite + Web Proxy simply by naming the local domain as username.operaunite.com :)

Answer 1

options:
1. still buy an IP address from Provo
2. if step 1 is not possible, buy a cheap vds for 4 bucks, raise openvpn there, connect to it from your win-machine and forward ports from vds to your computer.

Answer 2

line machine?