LabVIEW Shared Variables through Windows Firewall

Using the LabVIEW Shared Variable Server with remote computers and devices requires allowing certain programs and ports to pass through the Windows Firewall.

LabVIEW programs to allow through Windows Firewall

C:\Windows\SysWOW64\lkads.exe
C:\Windows\SysWOW64\lktsrv.exe
C:\Program Files (x86)\National Instruments\Shared\Tagger\tagsrv.exe

Even when using LabVIEW 64-bit, the directory for tagsrv.exe is still under the Program Files (x86).

For LabVIEW 32-bit, the lkads.exe and lktsrv.exe will be under c:\Windows\System32

Ports to allow through Windows Firewall

  • TCP: 2343, 59110-59115
  • UDP: 2343, 6000-6010

For the TCP ports, you must open one port above 59110 per “per application,”–by opening 59110-59115, we assume that no more than 5 applications are running concurrently.

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