PORTQRY (Download)

Port Query - Display the status of TCP and UDP ports, troubleshoot TCP/IP connectivity and security, return LDAP base query info, SMTP, POP3, IMAP4 status, enumerate SQL Server instances (UDP port 1434), Local ports, local services running (and the DLL modules loaded by each).

Portqry.exe can query a single port, a list of several ports, or a sequential range of port numbers.


The 3 modes are listed below: Command line, Local and Interactive mode.

Command line mode:
   portqry -n name_to_query [-p protocol]
             [-e | -r | -o endpoint(s)]
                [other options]

Command line mode options:
   -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]  Output a log file

   -y            Overwrite existing log file without prompting

   -sp [source port] Initial source port to use for query

   -sl     'slow link delay' Wait longer for UDP replies from remote systems

   -nr     By-pass default IP address-to-name resolution
           ignored unless an IP address is specified after -n

   -cn     Specify 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

Local Mode:
Local Mode gives detailed data on local system's ports

   portqry -local [-wt seconds] [-l logfile] [-v]
   portqry -wpid pid [-wt seconds] [-l logfile] [-v]
   portqry -wport port [-wt seconds] [-l logfile] [-v]

Local mode options:
   -local   Enumerate local port usage, port to process mapping,
           service port usage, and list loaded modules

   -wport [port_number]  Watch the specified port
           report when the port's connection status changes

   -wpid [process_ID]    Watch the specified process ID (PID)
           report when the PID's connection status changes
   -wt [seconds]   Watch time option
           specify how often to check for status changes
           valid range: 1 - 1200 seconds (default = 60 secs)

   -l [logfile]  Log file to create
   -v            Verbose output

Interactive Mode:
An alternative to command line mode

portqry -i [-options]

For help with -i run portqry.exe and then type 'help' <enter>


portqry -local
portqry -local -l MyLogFile.txt -v
portqry -wpid 1272 -wt 5 -l MyLogFile.txt -y -v
portqry -wport 53 -l dnslog.txt
portqry -n myserver.com -e 25
portqry -n -e 53 -p UDP -i
portqry -n host1.dev.reskit.com -r 21:445
portqry -n -o 25,445,1024 -p both -sp 53
portqry -n host2 -cn !my community name! -e 161 -p udp

For best results run local commands in the context of local administrator.
Port to process mapping is not be available on all systems.
Defaults: TCP, port 80, no log file, slow link delay off.

Hit Ctrl-C to terminate prematurely.

“I always look for a woman who has a tattoo. I see a woman with a tattoo, and I’m thinking, okay, here’s a gal who’s capable of making a decision she’ll regret in the future” - Richard Jeni


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Port Numbers at IANA or Wikipedia list of TCP and UDP port numbers
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