Search for IP beginning with 172.xxx.xxx.xxx

Remember it! It is your IP in NAT it will be now called as USER-IP.

IP of your VPS in NAT is all the same as USER-IP but ends with 1 (like: 172.xxx.xxx.1) Remember it! It will be now called VPS-NAT-IP.

Your public IP of your VPS(which you have used to connect to your server) will be now called VPS-PUBLIC-IP.

Step 5. Download and edit pre-made IPTABLES RULES.

Description: These rules allows incoming packets on certain port to your VPS be redirected to specified port to your PC inside VPN's NAT tables.

Download included in post iptables.txt, edit it and replace string "4789" with your PORT you want to unblock and USER-IP, VPS-NAT-IP, VPS-PUBLIC-IP, with your credentials.(use Notepad++ for example). Then upload it to your VPS.

After uploading type in putty: