Knowledge Base NComputing Commonly Asked Questions General Windows Configurations

            Configuring Firewall and Antivirus for NComputing Products

            Antivirus, firewall, and other types of security software can sometimes interfere with the initial configuration or continued operation of NComputing's vSpace software.  This document gives basic information on applications, services, and network communication within vSpace, which can be used to configure security software and help ensure compatibility and stable, continued operation.

            Possible Symptoms
            • Error: Network Error Code 10014 / Network Error Code 10054
            • vSpace Update Cannot Reach Update Server
            • vSpace Host Not Visible in Connection List
            • Client Hangs (Freezes) During Connection
            vSpace Installation Recommendations

            Please make sure to DISABLE any Anti-Virus or Firewall software during the installation of our product. Software of this type has been tested and known to interfere with the installation of our product.  After installation has completed, you may re-enable Anti-Virus and Firewall software.  

            If system instability occurs after installing NComputing vSpace, please try removing vSpace and any antivirus or security software present, and then reinstalling vSpace.  If the system is stable in this configuration, re-install the antivirus software.  In some cases, this change in install order can improve the interaction between vSpace and antivirus software.  If issues persist, please try configuring your security software to ignore/allow/trust the following ports and executables:


            Port Exceptions

            • L-series, M-series, and vSpace Client
              • TCP: 27605
              • UDP: 1027

            •  vSpace Server 6 (Windows)
              • Registration: TCP 80, 3630 (connects to:,   Disabled 4-30-2018
              • Update: TCP 20, 21 (,

            • vSpace Server 8 (Windows)
              • Registration: TCP 80, 3630 (connects to:,   Disabled 4-30-2018
              • Update: TCP 20, 21 (,

            • vSpace Pro 10 and 11 (Windows)   Note: vSpace 11 does not have an offline registration option     
              • Registration is done through the Management Portal: https port 443  for, IP address
              • vSpace Console to Manger connection (when installed separately): port 8666



            Service name



            TCP 8666

            NC License Server (NCLS)

            License Agent (LsAgent.exe) connects to it

            System (LicenseServer.exe)

            TCP 39568

            NC License Server (NCLS)

            vSpaceConsole.exe connects to it to get list of servers


            TCP 9443

            NC vSpace Console Server

            vSpaceConsole.exe connects to it to manage devices, networks, groups and profiles


            TCP 3689

            NC License Agent

            RPC calls from local (only local) vSpace Server


            UDP 67

            MX100 DHCP Server

            DHCP server for MX100D devices


            TCP 8667

            NC Monitor Server

            Health monitoring agents connect to it to provide collected data

            File Access Exceptions - Only if necessary

            •  vSpace Server 6 (Windows)
              • For all vSpace functionality
                • C:\Program Files\NComputing

            •  vSpace Server 8 (Windows)
              • For all vSpace functionality
                • C:\Program Files\NComputing vSpace Server for Windows

            •  vSpace Pro 10 (Windows)
              • For all vSpace functionality
                • C:\Program Files\NComputing


            The above exceptions and practices can help ensure the best level of interaction between vSpace and your environment.  If issues still persist with a particular 3rd party application, please contact the application's vendor.  If a workaround exists for your antivirus solution of choice and NComputing engineers have verified its effectiveness, a search for the application's name in the NComputing Knowledge Base will typically reveal any available solutions.

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