Description

By default, the Ansys license server communicates over three different ports.  We recommend leaving these ports set to their default values and allowing these Ansys processes through the firewall by application whenever possible, however, there are occasions that can require you to change these default port settings. 

The most common scenario is having to set a static port for the Vendor Daemon service, which by default is a dynamic port (changes every time the license manager service starts).  This is necessary if you need to allow these ports through a network VPN/firewall/router or are using a Linux license server.  This can also be required if you have other FlexNet based applications installed on the same server which are using these ports (SolidWorks, MATLAB, Creo, NX, etc.).

Ansys Communicates over Three Ports

• 1055 - Required for communication with the FlexLM service (lmgrd.exe)
• 2325 - Required for communication with the Ansys Licensing Interconnect service (ansysli_server.exe)
  • This port is only utilized for versions 2020 R2 and before.
• Dynamic port - Required for communication with the Ansys "Vendor daemon" service (ansyslmd.exe) 
  • By default, it changes every time the license manager is started.
  • This process/port is required for versions 2021R1 or later.
  • For versions 2020 R2 and prior, it's only required for Electronics products, and to view license status.

Solution