EBEALIEN

Thank you,
You are right, I did so and I resolved.
Vampire, you've been clear and helpful.
Now my server works well with the flight model.
Sometimes they seem impossible, and sometimes,
They ask elementary questions, but what matters is the answer, without too many "spins" of words.
Great, great.
Thank you!

If it isn't there by default you should be able to add it just about anywhere.
On my server it is directly below "vonCodecQuality";
https://github.com/EpochModTeam/Epoch/blob/release/Server_Install_Pack/sc/server-example.cfg#L43

The BE filters are normally located in the instance # folder/BattlEye - then open up the text file scripts.txt and add from the != onwards so just this bit: !=""pto: %3 | Players: %2 | FPS: %1 ", round diag_fps, count playableUnits, EPOCH_playerCrypto, mapGridPosition player];" to the end of the line that starts playableunits which is around line 20 if using notepad++
 
You will already have the 7 playableunits (The mod author is basically telling to look for: playableunits)
Hope that clears it up a little bit

The mission file is Epoch.Altis.pbo and is located in the MPMissions folder.
You need to unpack it using a tool such as PBO manager then modify the files within it, repack it with PBO Manager and upload it to your server.