I'm using the Plex IOS App Plex 4.5.ipa which I understand is the latest version of the App.
Plex Server is on a MacBook Air (my old laptop) which is also connected directly to the TV. It is running Plex Media Server on the MacBook air as the main Plex Server and I use the Plex Media Player Preview when I play movies etc. on the MacBook Air / TV.
Versions are:
Plex Media Player is version 1.0.3
Plex Media Server is 1.1.4.2959 (updated today)
OSX 10.12
IOS - Latest update 10.1.1
Every thing runs correctly on the individual devices in isolation. I can play Movies etc successfully on both the MacBook Air, my iPad and indeed on other devices in the house.
My issue (which has developed in the last 3-4 weeks) is that when ever I cast a media file from the iPad to the MacBook Air, it stops playing on the iPad and doesn't play on MacBook. (I get the turning circle on the iPad saying it is trying to cast to the MacBook Air.
After investigation, I have discovered that every time I try to cast my Firewall (Norton Security), is reporting a TCP SYN Flood attack, and I assume is stopping the cast from accessing the server.
Any help would be much appreciated