Port 2080 is the default port used by the Autodesk licensing service daemon (adskflex).
In most cases, you don’t have to specify the port number when you set ADSKFLEX_LICENSE_FILE:
Sometimes, depending on how the server is set up, you may need to add the port number:
Port 2080 is registered with the Internet Assigned Numbers Authority (IANA), and it’s unlikely you’ll ever have to use a different port.
But if you do, there’s two things you have to do. First, you need to change the port number on the VENDOR line of your license file:
SERVER LICSERVER-PC 0000deadbeef USE_SERVER VENDOR adskflex port=2081
Then, on all workstations and render nodes, you’ll have to include the port number in ADSKFLEX_LICENSE_FILE: