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Reference Number: AA-00283// Views: AA-00283// Created: 2015-02-24 12:45:46// Last Updated: 2023-12-13 20:11:52
[RT-LAB] How to Ensure the Windows Firewall or Network Doesn't Block RT-LAB Applications + List of Port/Protocols Used


In order for the simulation to work, a two-way Ping must work:

  • The host computer running RT-LAB must be able to ping an IP address (default is static IP) as displayed by the ifconfig on a Telnet connection to the OPAL-RT target.
  • The OPAL-RT target must be able to ping the IP address displayed by the ipconfig of the host computer running RT-LAB.

Depending on the architecture of your network, it may be possible to accomplish this by configuring routing rules in the gateway between specific IP addresses.

A quick test is to connect a cable directly between the Host PC and the OPAL-RT Target Simulator and try the two-way Ping. 


List of Ports and Protocols Used

Here is the list of protocols used: 


  • TCP/IP
  • FTP
  • ssh
  • UDP/IP

Here is the list of ports are used by RT-LAB (in parenthesis is the protocol or process using the port):

  • 20-21 (FTP)
  • 22 (SSH)
  • 23 (Telnet)
  • 1987 (OpalDLoader)
  • 2002 (MetaController)
  • 2525 (Reflexion node root)
  • 25250-25349 (Reflexion node leaf)
  • 32768-61000 (DataLogger)
  • 20100 (optargetd => broadcast

Other ports:

  • 61822 for dotnet server 
  • 61823 for node server

If you have any question about the configuration of your Firewall application, please contact your IT Department or your Firewall provider. 

If RT-LAB presents any undesirable behavior arising from this configuration, please contact OPAL-RT Support team.