Troubleshooting the Autodesk Network License Manager (NLM) can be confusing, with all of the different error messages and various codes. One of the most common reoccurring themes is testing whether the network ports are open to both the client and the server itself. The Autodesk software needs to have access to two separate ports to work properly. One is the master daemon port, which is typically 27000 (but can typically range from 27000 to 27009) and the other is the vendor daemon port, which Autodesk has been officially assigned 2080. If you have changed the default ports in your license file, then you will need to note which ports are being used when verifying if they are open.