Server Version#: 1.43.0.10492
Player Version#: N/A
When “network discovery” is enabled the server sends PTR requests for every IP on the lan.
.e.g.: 1.0.168.192.in-addr.arpa through 254.0.168.192.in-addr.arpa
There is no rate limit on these queries, usually sending ~80-120 per second. This trips network security which locks plex out for five minutes. I’ve added an exception for now, but I’d rather fix the root problem.
Will say I noticed similar activity on my LAN and was looking into it when I saw this. Its a recent change.
I’m running the current Plex Pass beta (1.43.1.10561) on all my servers and have not noticed the same. I tested on one of my Linux-based servers and it generated 5 PTR DNS inquiries over a period of ~13 minutes. And those referenced my DNS and other Plex Media server’s.
This was tested from two servers, with the following tcpdump command:
# tcpdump -i any -A port 53
The GDM network discovery option is enabled on these servers.
