This post is older than a year. Consider some information might not be accurate anymore.
Using Windows command line is sometimes challenging. Especially if you want to check if a special port is up and running (listening). This post demonstrates how.
Usually in Linux, you would go for
netstat -na | grep ":3128"
But Windows has nothing grep like :-x . Since Windows XP, findstr was introduced. It offers similar functionality to grep.
netstat -ano | findstr ":3128"
Some excerpt from the help
C:\Users>netstat \help
-a Displays all connections and listening ports.
-n Displays addresses and port numbers in numerical form.
-o Displays the owning process ID associated with each connection.
Some example output:
C:\Users>netstat -ano | findstr 3128
TCP 127.0.0.1:3128 0.0.0.0:0 LISTENING 6348
The last column contains the process id (PID). The pid can be used with a filter in tasklist to retrieve the process name.
C:\Users>tasklist /?
TASKLIST [/S system [/U username [/P [password]]]]
[/M [module] | /SVC | /V] [/FI filter] [/FO format] [/NH]
Description:
This tool displays a list of currently running processes on
either a local or remote machine.
Parameter List:
..
/FI filter Displays a set of tasks that match a
given criteria specified by the filter.
..
Filters:
Filter Name Valid Operators Valid Value(s)
----------- --------------- --------------------------
PID eq, ne, gt, lt, ge, le PID value
C:\Users>tasklist /FI "PID eq 6348"
Image Name PID Session Name Session# Mem Usage
========================= ======== ================ =========== ============
cntlm.exe 6348 Console 1 5'732 K
If you have cygwin running on the Windows machine, you can stay with grep.
$ netstat -na | grep :3128
TCP 127.0.0.1:3128 0.0.0.0:0 LISTENING
