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| Query ports on remote computers with PortQry |
| Although applications that scan for open TCP/IP ports on remote machines are common hacker |
| tools, you can use these applications to help you troubleshoot TCP/IP connectivity issues. |
| Like other port scanners, Microsoft's PortQry.exe queries the ports on remote computers and |
| reports on their status. The remote port can have a status of one of these three options: |
| Listening: This means the port is open and a process is listening. |
| Not Listening: This means that no process is listening on the remote port. |
| Filtered: This means that there is no response from that port. A process may or may not be |
| PortQry.exe is a command-line port scanner that accepts the commands through command-line |
| parameters and switches. For instance, to scan ports from 1 to 1024 on a computer with an IP |
| address of 192.168.0.1, you'd type: |
| Portqry -n 192.168.0.1 -r 1:1024 |
| For more information about the port scanner and to download PortQry.exe, read the Knowledge |
| http://support.microsoft.com/default.aspx?scid=kb;en-us;Q310099& |
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