Test port.exe download.Using the PortQry command-line tool

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

It also provides detailed information about the local computer’s port usage. Because 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 result may not be accurate for one or both of the following reasons:. However, when you troubleshoot a connectivity problem, it’s useful to know whether a port is being filtered or is listening.

This is especially true in an environment that contains one or more firewalls. PortQry refines its port status report by using a second set of tests that can interact with the service or program that’s listening on the target port.

For this test, PortQry does the following:. When you have to troubleshoot ports on the computer where you installed PortQry, use PortQry in local mode. When you use the local-mode parameters at the command line, you can do tasks such as the following on the local computer:. For more information, see Using PortQry in local command-line mode. You can run PortQry at a command prompt in the same manner as any other command-line tool.

Most of the examples in this article show command-line PortQry commands. In command-line mode, you can add multiple options to the command string to specify what query to run and how to run it. To run PortQry in command-line mode, run a command that uses the following syntax:.

This parameter is required. It’s not important whether the DNS server returns a positive or negative response. Any response indicates that the port is listening. Instead of querying a port on a remote target computer, you can use PortQry in local mode to get detailed information about the TCP ports and the UDP ports on the local computer where PortQry runs. Use the following syntax to run PortQry in local mode:. When you troubleshoot connectivity issues between computers, you might have to type many repetitive commands.

Such actions might be done more easily by using PortQry in interactive mode. To start PortQry in interactive mode, use the -i parameter. For example, run the following command:. You can use the following shortcuts together with the query command to run common queries without having to set port and protocol options. Use the following syntax:.

If you omit the shortcut, the q command queries TCP port For example, entering q dns in interactive mode is equivalent to running portqry -n You can use the set command to set options such as the source port or slow link delay.

Suppose you want to query a computer that has the IP address At the interactive mode command prompt, enter n This command produces output that resembles the following excerpt:. To send a DNS query, enter q dns at the interactive mode command prompt. PortQry uses this file to resolve port numbers to their corresponding service names.

PortQry uses this information to select the format for its queries. You can edit this file to direct PortQry to send formatted messages to an alternative port. For example, the following entry appears in a typical Services file:. You can edit this port entry or add an additional entry. When you run PortQry in local mode, as in the previous example, you might see output that resembles the following excerpt.

Such output indicates that the security context that PortQry is using doesn’t have sufficient permissions to access all of the information that it requested. The following command queries the default UDP port on a computer that’s specified by using its computer name:.

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In the search results, find and click System Restore. Follow the steps in the System Restore Wizard to choose a relevant restore point. Restore your computer to that backup image. If the Step 1 fails to resolve the test. If this Step 2 fails as well, please proceed to the Step 3 below.

In the Windows Update dialog box, click ” Check for Updates ” or similar button depending on your Windows version If updates are available for download, click ” Install Updates “. After the update is completed, restart your PC. Please follow the steps below to download and properly replace you file: Locate your Windows operating system version in the list of below “Download test. Click the appropriate “Download Now” button and download your Windows file version.

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When you use -y together with -l , PortQry overwrites the existing log file without prompting you to confirm the action. If the PortQry command string does not include -l , PortQry ignores -y. When you query over slow or unreliable network links, the normal wait time may be too short to receive a response.

By default, when you use -n to specify an IP address for the target computer, PortQry does a reverse name lookup to resolve the IP address to a name. This process may be time-consuming, especially if PortQry can’t resolve the IP address. Use -nr to skip this step of the query. If you use -n to specify a computer or domain name, PortQry ignores -nr.

PortQry can’t use a port that another process is already using. If the port that you specify is already in use, PortQry returns the following error message: Cannot use specified source port. Port is already in use. Specify a port that is not in use and run the command again. When this occurs, PortQry records “Using ephemeral source port” in its output. To temporarily turn off the IPSec policy agent so that you can use port , run net stop PolicyAgent.

When you have finished testing, run net start PolicyAgent. You must delimit this value by using exclamation points, as shown in the left column. The default community name is public. When you use -q , PortQry suppresses all screen output except for error messages. To see output other than error messages, use -q together with -l.

PortQry records the normal output in the log file. If a log file already exists and you use -q together with -l , PortQry overwrites the existing log file without prompting you.

You cannot use -q together with -o , -r , or -p both. This parameter is especially helpful when you use a batch file to run a PortQry command string. This output is similar to the output that the netstat. On computers that support PID-to-port mappings, the output includes the PID of the process that’s using the port on the local computer.

If you use the verbose option -v , the output also includes the names of the services that the PID belongs to and lists all the modules that the process has loaded. You can use this information to determine which ports are associated with a particular program or service that’s running on the computer. Monitor a specific port for changes.

To stop monitoring, press Esc. Monitor a specific PID for changes in the number and state of connections. You cannot use -wt by itself or together with -local. Queries the current destination, using the current settings.

The default protocol is tcp. The default destination port is TCP port The default source port is port 0 an ephemeral port. You can use one of several shortcuts with the query command in order to run any of several common queries. For a list of the available shortcuts, see Interactive mode query shortcuts. To see a list of the current values of the available options, enter set all. For a list of the available options, see Interactive mode options.

If you specify a port number of zero, PortQry uses an ephemeral port. If you change this option, PortQry skips the name resolution step. PortCheck is free for private and professional use. You can use PortCheck without any restrictions, in unlimited number and with unlimited duration for free. You are not allowed to distribute PortCheck alone or as part of your software.

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