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Home > Success Center > Network Performance Monitor (NPM) > DNS entry is unavailable on a monitored node

DNS entry is unavailable on a monitored node

Updated June 29, 2017


A DNS entry is not available and is displayed as a blank entry on a node.


  • All NPM versions
  • All SAM versions
  • All UDT versions


The reverse DNS is unavailable for the IP address on the DNS server where the Orion server is configured to query on the primary NIC.


  1. Establish a remote connection to the Orion server.
  2. Open a command prompt and run the following command:
    nslookup [IP address]

If no response is received, this means that Orion is unable to determine the DNS.

Consult with the DNS server administrator as there may be no PTR record or a badly configured record is present.


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