asked on

Kill TCP IP & Port

Hi Experts,
How to grep connected tcp IP & Port connection then forcefully kill using batch.

example;-
netstat -a output is

Active Connections

Proto Local Address Foreign Address State
TCP 192.168.1.101:49366 192.168.1.55:65000 ESTABLISHED
TCP 192.168.1.101:49475 192.168.1.55:64000 ESTABLISHED
TCP 192.168.1.101:49384 192.168.1.55:63500 ESTABLISHED
TCP 192.168.1.101:49396 192.168.1.55:22 ESTABLISHED

Need to forcefully kill all TCP connection which is connected with 192.168.1.55

Predrag Jovic

netstat -ano
output:

Proto  Local Address          Foreign Address        State           PID
  TCP    0.0.0.0:135            0.0.0.0:0           ESTABLISHED      1296

Open in new window

taskkill /f /im 1296

It may require elevated privileges.

ASKER CERTIFIED SOLUTION

Qlemo

membership

This solution is only available to members.

To access this solution, you must be a member of Experts Exchange.

Start Free Trial

Rajat Sehgal

ASKER

Is there any idea with batch, which can i use easily ?

Qlemo

All you need to put into a .cmd or .bat file is the line as I have shown (the very last line). Put that and CurPorts into the same folder, and run the batch file. Nothing more to do.

Giovanni

If you're trying to kill all connections from the command line then simply run

cports /close * * * *

Open in new window

If you want to process each connection for some reason, then you could use the following as a template:

[TCPKill.bat]

@echo off
setlocal enabledelayedexpansion
for /f "tokens=2,3,5" %%a in ('netstat -ano -p tcp^|findstr ESTABLISHED') do (
	set str=%%a %%b %%c
	set str=!str::= !
	if exist cports.exe (
		echo running cports.exe /close !str!
		cports.exe /close !str!
	) else (
		echo cports.exe not found.
		goto :eof
	)
	set str=
)

Open in new window

Which is good for IPv4 connections. Bear in mind a given process may simply try to reconnect once disconnected.

Rajat Sehgal

ASKER

Helpful

Kill TCP IP &amp; Port

Kill TCP IP & Port