[kortilla]

If you’re concerned about records, port forwarding isn’t that relevant. Lookup nat binding records, which is how ISPs keep track of users behind nat.

[rogers18445]

How is that relevant here? mullvad has to keep track of who to forward the port to, any NAT ports are going to be ephemeral and conducted through an encrypted tunnel.

[kortilla]

Whether a port is forwarded or allocated on demand for a connection is irrelevant when you have a nat binding record keeping infrastructure.