Yes, the FMS will only allow you to use certain ports. These are in the manual, rule R60:
Quote:
Communication between the ROBOT and the OPERATOR CONSOLE is restricted as follows:
A. Network Ports:
i. TCP 1180: Camera data from the roboRIO to the Driver Station (DS) when the camera is connected the roboRIO via USB, bi-directional.
ii. TCP 1735: SmartDashboard, bi-directional
iii. UDP 1130: Dashboard-to-ROBOT control data, uni-directional
iv. UDP 1140: ROBOT-to-Dashboard status data, uni-directional
v. HTTP 80: Camera connected via switch on the ROBOT, bi-directional
vi. HTTP 443: Camera connected via switch on the ROBOT, bi-directional
vii. UDP/TCP 554: Real-Time Streaming Protocol for h.264 camera streaming, bi- directional
viii. UDP/TCP 5800-5810: Team Use, bi-directional
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Make sure the port you are using that is set up on both sides is one of these ports. I believe the home configured firmware also restricts these to these ports.