Minim Server not found due to firewall on synology

[simoncn]

These ports are correct. Please try stopping MinimServer from the Synology Package Center and starting it again. If this doesn't fix the problem, try powering the NAS off and on.

The initial discovery protocol uses a sequence of messages. Some of these are multicast UDP, some are unicast UDP and some are TCP. If it still isn't working after following the above suggestions, I can provide instructions for creating a debug log that should show which discovery messages are being received by MinimServer.