How do I replace the default certificate? I didn't found a way so far. As you can see at the attachment, there is no button to do so.

I have a Synology box running a media server on VLAN2 and want to make it available on VLAN4 where my television is connected to. How do I do that? Within VLAN2 the Syno media server is visible, but not on the other VLAN's. Tried many things but as I...