Why Plex send SSDP (Simple Service Discovery Protocol) (DNLA)?

Plex Media Server
1

Server Version#: 4.74.2

Hello.

I contact you because I have a problem with the DLNA.

I disabled this one and despite everything, the server continues to send requests :

  • NetworkServiceBrowser: Error sending out discover packet from XXX.XXX.XXX.XXX to 239.255.255.250: Operation not permitted

These requests are blocked by my firewall to avoid polluting the network.

Why does the server continue requests even though the DLNA setting is disabled?

How do I permanently disable DLNA?

Thank you for your help and for your explanations.

2

This isn’t so much related to DLNA but Plex looking for Plex apps or playback targets in your network.

You should be able to disable Settings > [Server Name] > Network > Enable local network discovery (GDM). I’m not 100% sure this will cease all communication… it’ll certainly limit the available functionality of your server.

3

Plex is also looking for network gateway devices using this method. And you can’t completely disable it with a server preference setting.

4

SSDP is also how Plex Media Server discovers network tuners (such as those from SiliconDust) on your local network.

5

Thank you all for your explanations and for taking the time to answer my questions.