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This warning message usually indicates a connection issue between Deep Security Manager and the target computer. In order to successfully add a new computer to Deep Security Manager, ensure the following:

  • The Agent is installed and running on the target computer.
  • DNS is set up correctly, and the DSM can resolve the computer name or FQDN of the target computer.
  • You can telnet to port 4118 of the target computer from Deep Security Manager.

If the issue persists after ensuring the items above, contact Trend Micro Technical Support.