Upon startup, Plex probes the local network using the G’Day Mate (GDM) network/service discovery protocol to locate other compatible media devices and streaming clients.

Plex Media Server is a personal media library and streaming system which runs on modern Windows, macOS, and Linux operating systems, along with variants customized for special-purpose platforms such as network-attached storage (NAS) devices, external RAID storage units, digital media players, etc. Cited observed number of PMSSDP attacks observed to date, along with number of PMSSDP reflectors/amplifiers leveraged.Updated number of abusable PMSSDP reflectors/amplifiers.Added observed use of source UDP port 32410 in PMSSDP reflection/amplification attacks.Included Plex guidance on circumstances which could facilitate the potential abuse of Plex Media Server instances in reflection/amplification DDoS attacks, along with guidance on remediation.Credited Baidu Labs with initial public disclosure.Added link to Baidu Labs Chinese-language initial disclosure post.Ĭhanges for Version 1.1 (February 6, 2020):.Added information concerning new Plex Media Server (PMS) update which prevents PMS from being abused to launch reflection/amplification DDoS attacks.Changes for Version 1.2 (February 7, 2020): Contributors: Ben Crowther, Ion Schiopu, Jon Belanger, Chris Conrad, Andrew Bartholomew.

Plex cloud 2020