Port query a command line utility
Portqry.exe is a command-line utility that can use to help troubleshoot TCP/IP connectivity issues. PortQry then sends a correctly formatted message that the listening service or program understands. PortQry uses the correct session layer or application layer protocol to determine if the port is listening. PortQry uses the Services file that is located in the %SYSTEMROOT%\System32\Drivers\Etc folder to determine which service listens on each port.
THis reports the status of a TCP/IP port .PortQry version 2.0 features
A process is listening on the port on the computer that you selected. Portqry.exe received a response from the port.
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.
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 -n domain.com -p tcp -e 25 ;which means resolve “domain.com” to an IP address and then queries TCP port 25 on the corresponding host
portqry -n myserver -p udp -e 389 ; response from the LDAP server to the user.
portqry -n myserver -p udp -e 135 ;his query returns (dumps) all the end points that are currently registered with the RPC endpoint mapper.
portqry -n 127.0.0.1 -e 161 -p udp -cn !secure123! ;determine whether SNMP port 161 is listening specific community name rather than a default community name public (-cn),
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 -n 192.168.1.20 -e 1434 -p udp ; queries UDP port 1434 to query all the SQL Server named instances that are running on a SQL Server
portqry -n myproxy-server -p udp -e 1745; queries ISA server port 1745 to communicate with Winsock proxy clients and with firewall clients.
Command line mode:
portqry -n name_to_query [-p protocol] [-e || -r || -o endpoint(s)] [-q]
[-l logfile] [-sp source_port] [-sl] [-cn SNMP community name]
Command line mode options explained:
-n [name_to_query] IP address or name of system to query
-p [protocol] TCP or UDP or BOTH (default is TCP)
-e [endpoint] single port to query (valid range: 1-65535)
-r [end point range] range of ports to query (start:end)
-o [end point order] range of ports to query in an order (x,y,z)
-l [logfile] name of text log file to create
-y overwrites existing text log file without prompting
-sp initial source port to use for query
-sl ‘slow link delay’ waits longer for UDP replies from remote systems
-nr by-passes default IP address-to-name resolution
ignored unless an IP address is specified after -n
-cn specifies SNMP community name for query
ignored unless querying an SNMP port
must be delimited with !
-q ‘quiet’ operation runs with no output
returns 0 if port is listening
returns 1 if port is not listening
returns 2 if port is listening or filtered
Notes: PortQry runs on Windows 2000 and later systems
Defaults: TCP, port 80, no log file, slow link delay off
Hit Ctrl-c to terminate prematurely
portqry -n myserver.com -e 25
portqry -n 10.0.0.1 -e 53 -p UDP -i
portqry -n host1.dev.reskit.com -r 21:445
portqry -n 10.0.0.1 -o 25,445,1024 -p both -sp 53
portqry -n host2 -cn !my community name! -e 161 -p udp
command tools can be download from http://www.microsoft.com/downloads/details.aspx?familyid=89811747-C74B-4638-A2D5-AC828BDC6983&displaylang=en
And UI can be download from