query TCP UDP ports in Windows

Portqry.exe is a command-line utility that you can use to help troubleshoot TCP/IP connectivity issues

The utility reports the port status of TCP and UDP ports on a computer that you select.

Portqry.exe can query a single port, an ordered list of ports, or a sequential range of ports.

it's a great tool to have when you need to query UDP ports (that TELNET cannot do)

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.

·    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.

Syntax:

·   -n [server]—IP address or name of server to query
·   -p [protocol]—TCP or UDP or BOTH (default is TCP)
·   -e [endpoint]—single port to query (valid range: 1-65535)
·   -r [endpoint range]—range of ports to query (start:end)
·   -o [endpoint order]—range of ports to query in an order (x,y,z)
·   -l [logfile]—name of log file to create
·   -s—"slow link delay" waits longer for UDP replies from remote systems
·   -I—bypasses default IP address-to-name lookup; ignored unless an IP address is specified after -n
·  -q—"quiet" operation runs with no output

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

Download link: http://www.microsoft.com/en-us/download/confirmation.aspx?id=17148