Open the billing at https://portal.coretek.ru.
Click "Login" button and enter your email and password. The password for billing access is contained in the first letter you received from the billing system.
Select the menu item “Products\services" or click on the "Services" button. The interface language can be changed via the menu item with the book icon.
Find your account in the list and click the red arrow on the right.
See following information on page with detailed product description:
The download button for the configuration file may not work in all browsers. Click on the text field and select all the text (cmd+a, ctrl+a, etc.). Then create a text file with an arbitrary name and extension ".ovpn", copy the contents of the clipboard into it and save to disk.
Form of port forwarding control contains a short instruction on how to set a list of ports.