What ports and protocols does a Speedgoat target use to communicate with the host PC in Simulink Real-Time?

What network ports does the Simulink Real-Time product require to maintain connectivity between the host PC and Speedgoat target?

Answer 1

[MathWorks Support Team]

Simulink Real-Time (SLRT) requires multiple network ports and protocols to enable communication between the host PC and Speedgoat target via the "HostLink" interface.

To ensure full SLRT functionality, it is essential to allow all required ports and protocols through any firewalls between the host and the target, as listed below. Blocking or filtering any of them can result in limited functionality, so it's crucial to work with your IT or network security team to define the necessary firewall rules and unblock the affected ports.

For Windows host PCs, refer to the following MATLAB answer for step‑by‑step Windows Firewall configuration guidance: How do I configure Windows Defender Firewall for SLRT?

Disclaimer: The exact list of ports and protocols may vary depending on the contents and functionality implemented in the model, and may change from release to release.

For R2020b through R2025b:

In R2020b through R2025b, SLRT uses a 64-bit POSIX-compliant real-time operating system (RTOS) on the Speedgoat target with the following port and protocol requirements:

Protocol	Transport Protocol	Target PC (Remote Port)	Host PC (Local Port)
FTP	TCP	20-21	Ports assigned by host OS
SSH, SFTP*	TCP	22	Ports assigned by host OS
XCP	UDP	5555	Ports assigned by host OS
RTPS / FastDDS	UDP	5505-5507, 5510-5512, 5515-5517, 5520-5522	7400–7499

* By default, the host-target connection in MATLAB uses FTP. To enable SFTP, see this MATLAB answer.

For R2026a and later:

Since R2026a, SLRT uses a 64-bit Linux-based RTOS on the Speedgoat target with updated port and protocol requirements:

Protocol	Transport Protocol	Target PC (Remote Port)	Host PC (Local Port)
FTP	TCP	20-21	Ports assigned by host OS
SSH, SFTP*	TCP	22	Ports assigned by host OS
XCP**	UDP	5555	Ports assigned by host OS
MQTT	TCP	1883	Ports assigned by host OS
MQTT over TLS (Secure MQTT)***	TCP	8883	Ports assigned by host OS
HTTP / HTTPS***	TCP	8080	Ports assigned by host OS

* By default, the host-target connection in MATLAB uses FTP. To enable SFTP, see this MATLAB answer.

** Since R2026a, XCP is no longer used by the host-target connection in MATLAB. It is required only when connecting Third-Party Calibration Tools such as Vector CANape® or ETAS® Inca to the target.

*** Use setupTLSCertificate(tg) to set up a TLS certificate for MQTT and HTTP.

Additional Notes:

1) Remote access: If you intend to access a Simulink Real-Time target remotely, the ports mentioned above must be allowed through your VPN security configuration. See the following answer for more information regarding remote access to Speedgoat:

Remote access to a Simulink Real-Time Speedgoat target through VPN

2) Changing the gateway of the Speedgoat target: To ensure proper network configuration, you may need to change the gateway of the Speedgoat real-time target machine. Here are the steps to do so:

How can I access a Simulink Real-Time (SLRT) Speedgoat target computer on a separate network?

3) Further troubleshooting: If the above instructions don't help resolve the communication issues with your Speedgoat hardware, refer to this MATLAB Answer for additional troubleshooting steps:

Troubleshooting connection issues with Speedgoat target computers