PortQry received one of the following ICMP messages from the target port:

NOT LISTENING: This response indicates that no process is listening on the target port.

PortQry received a response from the target port.

LISTENING: This response indicates that a process is listening on the target port.

PortQry reports the status of a port as one of three values: To produce more accurate and useful results, PortQry uses a two-step testing process. Typically, the service or program that listens to a port responds only to a message that uses a specific session layer or application layer protocol.

Most services don't respond to an unformatted user datagram that's sent to them.

If there's no response to a directed datagram, the target port might be FILTERED.

This result may not be accurate for one or both of the following reasons: Typical port scanning tools report that the port has a LISTENING status if the target UDP port doesn't return an Internet Control Message Protocol (ICMP) 'Destination unreachable' message. To get the PortQryUI tool, see PortQryUI - User Interface for the PortQry Command Line Port Scanner. PortQryUI has several features that can make using PortQry easier. You can download a separate tool, called PortQryUI, that includes a graphical UI for PortQry. Similar to command-line mode, but you can use shortcut commands and parameters. In this mode, you can use several parameters that are intended for troubleshooting the local computer.

You can use this mode to troubleshoot local or remote computers. You can use PortQry from a command prompt in one of several modes: It also provides detailed information about the local computer's port usage.īecause PortQry is intended to be used as a troubleshooting tool, users who use it to troubleshoot a particular problem should have sufficient knowledge of their computing environment. This tool reports the status of target TCP and User Datagram Protocol (UDP) ports on a local computer or on a remote computer.

PortQry is a command-line tool that you can use to help troubleshoot TCP/IP connectivity issues. Applies to: Windows 10 - all editions, Windows 8.1, Windows 8, Windows 7, Windows Server 2019, Windows Server 2016, Windows Server 2012 R2, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003 Summary

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