What does UPnP / NAT-PMP port forwarding do when I've got Mullvad VPN when I'm torrenting

What does UPnP / NAT-PMP port forwarding do when I’ve got Mullvad VPN when I’m torrenting? I noticed I had “Use What does UPnP / NAT-PMP port forwarding” selected and a random port, but I’m using Mullvad and I know they discontinued port forwarding. I’m probably understanding something wrong here I’m sure. I have qbittorrent bound to Mullvad. Is it just not doing anything and it doesn’t matter if I have it selected or not?

Yeah. qBittorrent sends a NAT-PMP packet to the gateway at Mullvad to ask for opening the port, which it promptly ignores.

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