In MATLAB R2020b and later, Simulink Real-Time (SLRT) uses new protocols and ports for the host-target connection. This requires adjustments to your firewall and network configurations as outlined in the steps below.
Important: It is highly recommended to perform these steps in collaboration with your IT system administrator.
1. Configure the PC Ethernet Interface as 'Private':
To ensure smooth host-target communication in R2020b or later, set the host PC Ethernet interface to 'Private'. Windows classifies all Ethernet connections as 'Public' by default, which may disrupt communication due to security restrictions associated with this network type. Additionally, SLRT assumes that the host and target are directly connected through a local network (LAN) on the same subnet, making the 'Private' setting appropriate. Refer to our documentation for detailed instructions:
2. Configure Your Firewall(s)
An important step is to allow MATLAB to communicate through the firewall, ideally for all types of networks (Public, Domain, and Private). Refer to the following MATLAB Answer:
On many systems, creating an additional inbound UDP rule is required to allow communication for the RTPS protocol. For details, see:
Important: Check if there are multiple firewalls active on your system. Ensure all firewall and antivirus software is configured correctly to allow host-target communication.
3. Unblock Ports Used by Simulink Real-Time
Have your IT department unblock the necessary ports through firewalls, network hubs/switches, and VPN security configurations (for remote connections). Refer to this MATLAB Answer:
4. Further Troubleshooting
If the above steps don't resolve the issue, refer to this MATLAB Answer for additional troubleshooting:
