Forwarding certain ports through a VPN service?

Question

VPN

I am looking for an elegant solution to the problem:
there is a server on a white ip with a bunch of services, http, ftp, mysql and .... tyudyu, but we see problems with some of them: in
short (example): we work with clients on TCP ports: 5112 and UDP: 5113 we listen to TCP ports: 5518 and UDP: 5519
(and another of the services of about the same plan, only the ports are different and there are more of them)
we need a solution to forward only these ports through, say, a VPN (the simplest, cheapest VPN without bells and whistles, 100r\ months) we will most likely install the openvpn client software on the server,
but how to resolve it so that only these two services work through the VPN (from the example), and all the rest continue to work through our dip, given that all this is on one win2008 server
(for a better understanding why\why)
due to stable problems with Provo, these ports are blocked to us (talks with the provider do not solve anything, they recognize the problem, but for our sake they cannot cope with it, because they have something fundamental there and requires a lot of work / money, so every 4-7 days you have to call and ask to open ports), we are not going to change the provider either, since many services are tied to our IP

Answer 1

You will not be able to receive incoming traffic on the ports that you need on "VPN without bells and whistles, 100r / month". In order to do this, you need to buy a dedicated IP from a VPN service and set up address translation (NAT).
This is where the fun begins
1) You need to find a VPN service that provides a permanent IP, there are such.
2) You will need to make sure that this VPN service allows you to configure NAT over the VPN connection.
I do not think that 100r is a real budget. A more or less working option is to buy a virtual server for 300r (+ -50r) and set up everything you need yourself.