SoftEther VPN User Forum

I have a vpn server with secureNAT running on a Linux VPS. When I use BitTorrent downloader it says my listening port is blocked, the UPnp function is unavailble either. So is it possible to set port mapping like on a real router to solve this problem?

You can use the UPnp on Linux.
Try to use tap localbridge instead of SecureNAT.