November 2015
Bump. Still happening when two or more players are using the same network.
Connection is IPv6 in transition, meaning it's using DS-Lite. Since that recent change problems started. All players get kicked randomly from the server with that 3659 UDP message. Is there anything official yet? Also a looooong thread in the forums is still giving no working answers: http://battlelog.battlefield.com/bf3/forum/threadview/2955064774418606083/1/
A fix would be greatly appreciated.
December 2019
Hi , try to install Smart Port forwarding , work for me.Just install the program , run it, and create 2 port, 1 UDP and 1 TCP whit listen port 3659(both of them), and leave the program to run in background while you playing.
January 2020