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