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Home > Success Center > Network Performance Monitor (NPM) > NPM - Knowledgebase Articles > DNS data in SNMP Traps

DNS data in SNMP Traps

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Created by Richard Casey, last modified by MindTouch on Jun 23, 2016

Views: 1,175 Votes: 0 Revisions: 4

Overview

This article describes how SNMP traps will show the source IP address as well as hostname data.

Environment

All NPM versions

Steps

When a node is monitored in NPM, the DNS data is pulled from the Nodes or Nodesdata table (depending on the version).

  1. This is configured in NPM, Settings> Polling Settings> Perform reverse DNS lookup.
  2. If a node is not monitored in NPM, the Trap service runs a DNS lookup on the IP address using the server DNS settings.
  3. This is configured in c:\programfiles(x86)\solarwinds\orion\swtrapservice.exe.config file:-
    <add key="EnableDNSResolving" value="true" />
  4. If a DNS lookup is not required, this can be changed to false:-
    <add key="EnableDNSResolving" value="false" />

Note: Changes to the above config file will require the Trap services to be restarted in order to make the change.

 

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