Portqry.exe is a command-line utility that you can use to
help troubleshoot TCP/IP connectivity issues. Portqry.exe runs on Windows
2000-based computers, on Windows XP-based computers, and on Windows Server 2003-based computers. The utility
reports the port status of TCP and UDP ports on a computer that you select.
Note Version 2 of Portqry.exe is now available. The Microsoft Download Center link at the end of this article has been updated to reflect the new version. Version 1.0 of Portqry.exe has been removed from the Microsoft Download Center.
Portqry.exe reports the status of a TCP/IP port in one of
the following three ways:
- Listening
A process is listening on the port on the computer that
you selected. Portqry.exe received a response from the port. - Not Listening
No process is listening on the target port on the target
system. Portqry.exe received an Internet Control Message Protocol (ICMP)
"Destination Unreachable - Port Unreachable" message back from the target UDP
port. Or if the target port is a TCP port, Portqry received a TCP
acknowledgement packet with the Reset flag set. - Filtered
The port on the computer that you selected is being
filtered. Portqry.exe did not receive a response from the port. A process may
or may not be listening on the port. By default, TCP ports are queried three
times, and UDP ports are queried one time before a report indicates that the
port is filtered.
Portqry.exe can query a single port, an ordered list of ports,
or a sequential range of ports.
Examples
The following command tries to resolve "reskit.com" to an IP
address and then queries TCP port 25 on the corresponding host:
portqry -n reskit.com -p tcp -e 25
The following command tries to resolve
"169.254.0.11" to a host name and then queries TCP ports 143,110, and 25 (in
that order) on the host that you selected. This command also creates a log file
(Portqry.log) that contains a log of the command that you ran and its output.
portqry -n 169.254.0.11 -p tcp -o 143,110,25 -l portqry.log
The following command tries to resolve
my_server to an IP address and then queries the
specified range of UDP ports (135-139) in sequential order on the corresponding
host. This command also creates a log file
(
my_server.txt) that contains a log of the command
that you ran and its output.
portqry -n my_server -p udp -r 135:139 -l my_server.txt
Portqry.exe is available for download from the
Microsoft Download Center. To download Portqry.exe, visit the following Microsoft Web site:
Important The PortQueryUI tool provides a graphical user interface and is available for download. PortQueryUI has several features that can make using PortQry easier. To obtain the PortQueryUI tool, visit the following Microsoft Web site:
For additional information about PortQry version 2.0, click the following article number to view the article in the Microsoft Knowledge Base:
832919Â
(http://kbalertz.com/Feedback.aspx?kbNumber=832919/
)
New features and functionality in PortQry version 2.0
For additional information about related topics, click the following article numbers to view the articles in the Microsoft Knowledge Base:
310298Â
(http://kbalertz.com/Feedback.aspx?kbNumber=310298/
)
How to use Portqry.exe to troubleshoot Microsoft Exchange Server connectivity issues
310456Â
(http://kbalertz.com/Feedback.aspx?kbNumber=310456/
)
How to use Portqry to troubleshoot Active Directory connectivity issues
832017Â
(http://kbalertz.com/Feedback.aspx?kbNumber=832017/
)
Port requirements for the Microsoft Windows Server System
325494Â
(http://kbalertz.com/Feedback.aspx?kbNumber=325494/
)
Support WebCast: port scanning using PortQry