What is fakejour?

DVR listens on UDP:8899

$ ss -lnup sport = :8899
UNCONN 0 0 0.0.0.0:8899 0.0.0.0:* users:(("channels-dvr",pid=477,fd=108))

In the past it was trying to start fakejour(?) on that port

2022/09/04 16:11:56.490988 [ERR] Failed to start fakejour: listen udp 224.0.0.224:8899: setsockopt: no such device

This is the MDNS Bonjour service that Channels DVR Server uses to let the Channels app discover it over the network.

Isn't port 5353 used for this?

Searching for 8899 produces no hits

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It's a discovery protocol.

I can not see any client trying to use it. When I block port 5353 ATV fails to find the DVR server and Firestick 4k just connects to the IP and is happy. Can the port just be blocked?

Yes, and you can just turn bonjour off in Settings on your Channels DVR Server.

But you will have to connect to your Channels DVR Server from Channels manually via IP address.

For ease of use, don't block it, and keep it running.

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