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Home > Success Center > Orion Platform > Testing SNMP port connection using telnet

Testing SNMP port connection using telnet

Updated September 21, 2017


This article explains why using telnet to test the SNMP port connection will not work and how to test the connection in the correct way.


  • Orion Platform, all versions


The telnet to SNMP port (e.g. 161 or 2055) will not work due to the fact that it uses a one-way/no-response UDP protocol.

In order for telnet to work, it needs a 2-way/query-response protocol such as TCP.


To test the SNMP port connection you will need to use a Microsoft tool called PortQry.

It will show you if the port is listening and more depending on the command you will use.

The tool is widely available and if you need more information about it, see "Description of the Portqry.exe command-line utility" (© 2017 Microsoft, available at, obtained on September 21, 2017.).



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