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Home > Success Center > Network Performance Monitor (NPM) > NetPath: PercentPortClosed 100% is over the critical threshold 25%

NetPath: PercentPortClosed 100% is over the critical threshold 25%

Created by Craig O’ Neill, last modified by Mike Wethington_ret on Dec 21, 2016

Views: 2,499 Votes: 2 Revisions: 4

Updated July 4, 2016


Netpath appears to be working correctly but the following error message is displayed:

PercentPortClosed 100% is over the critical threshold is 25%


NPM version 12


The error message occurs when NetPath has reached the endpoint server but the port was closed.


  • The endpoint service must be running on tcp/161 not udp/161.
  • NetPath probes TCP ports.
  • If it is truly tcp/161,  use PsPing to test the port availability from NetPath probe machine. The error message NetPath reported means NetPath reached the endpoint server but the port was closed.

Open the following ports on your firewall for network connectivity used by NetPath:

Port or Code Source Destination Protocol Description
17778 NetPath probe Orion polling engine TCP Used to send information back to your SolarWinds Orion server.
11 Networking devices along your path NetPath probe ICMP Used by the NetPath probe to discover network paths.
User configured NetPath probe Endpoint service TCP

Any ports of the monitored services that are assigned to the probe.

Used by the NetPath probe to discover service status.

43 NPM polling engine BGP data providers TCP Used by NetPath to query IP ownership and other information about the discovered IP addresses.

For further information please see:


Disclaimer: Please note, any content posted herein is provided as a suggestion or recommendation to you for your internal use. This is not part of the SolarWinds software or documentation that you purchased from SolarWinds, and the information set forth herein may come from third parties. Your organization should internally review and assess to what extent, if any, such custom scripts or recommendations will be incorporated into your environment.  You elect to use third party content at your own risk, and you will be solely responsible for the incorporation of the same, if any.



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