The problem is that although port 80 is reachable, I have no idea how the communication works; perhaps I should just check the NAT tables.
Meanwhile, here's an email that I've just received
Hi XXX,
We have check with our Product Management team about future compatibility between the D-View Cam software and the DCS-8000LH cameras. The DCS-8000LH model will not be supported in D-View Cam for remote viewing or recording.
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Best Regards,
Customer Service Dept.
Service à la Clientèle.
D-Link Networks
2525 Meadowvale Blvd
Mississauga, Ontario
L5N 5S2