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Home > Success Center > Netflow Traffic Analyzer (NTA) > No NetFlow data after migrating Orion server

No NetFlow data after migrating Orion server

Created by Brian O'Donovan, last modified by MindTouch on Jun 23, 2016

Views: 24 Votes: 0 Revisions: 3


This article addresses the issue where there is no NetFlow data after migrating an Orion server.


All NTA versions


This occurs when Windows Firewall is enabled and is blocking traffic on the NTA receiver port. 


Perform any of the following options:

  • Disable the Windows Firewall. Refer to Turn Windows Firewall on or off.
  • Create a rule to allow traffic through the NetFlow Receiver port. 
    Note: The default port is 2055.


Last modified
20:37, 22 Jun 2016