There's more to it than a simple telnet connection.  Samsung had to sanction the driver for each control system.  There's a token that has to be issued by the control system and then accepted by the TV during setup before IP control will work.

My experience with IP control on Samsung is fairly limited (only been using it for a couple months) but so far no real issues.  I've heard about trouble over WiFi, but if you hard wire Ethernet and create a MAC reservation or hard coded IP to lock in the address control seem solid.