I run my own Forge 1.12.2 server from my pc. Only 2 other people can join and they have no lag whatsoever. The other person "times out" and it's different people, not just one. Like one person could get in one day and not the next time I restart.
I've already tried:
-Adding more ram. (8GB Right now, half of my total)
-Changing settings in java to allow "native sandbox"
-Java 64, not 32
-My connection is via my own personal ip and theirs is ipv4:25565
OS: Windows 10 Home on MSI PC
I would be very grateful for any help and I hope I can get this sorted.