+1 for the issue seen here as well. My setup, MacOS Mojave with PMS 1.14.1.5488. DLNA and GDM are also disabled. At this point it’s taking down part of my network. SSDP is puking out a broadcast then pings/IP traffic start to drop to the responders.. super frustrating… Been chasing this for a week, thought it was my switch. Nope. It’s PMS. I can shut down PMS and icmp traffic returns to normal. Would LOVE a fix. Going to try filtering SSDP Port 1900 outbound on my Plex server next. See attached and the narrative, first arrow is SSDP burp on port 1900 from my PMS (192.168.2.11), then local devices respond, then pings start to drop. Crazy… Thanks for the help in advance, how can this be disabled?
Here’s a look at that first SSDP request -
