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Tuesday, November 15, 2011

How To Find Out Who's Connected To Your Computer



Would you like to know if somebody is connected to your computer? There is a dos command called "netstat" that can help you find that out.  Before you do it make sure you close your browser, email client, chat, or any software that connects to the internet.  Here's how you are going to do it:
  1. Go to run and type cmd
  2. The command prompt will open up, type "netstat -ano" (without the quotation) . You may also use "netstat -ano 10" so that it continously refresh the screen every 10 seconds.  To terminate it just press CTRL + C.
  3. Look closely for those that has "established" state.  If you see something that is connected despite that you closed already the programs that connects to the internet chances is somebody is snooping on your computer. Take note of the PID of that program.
  4. To stop that program open the Task Manager by pressing CTRL + ALT + DEL simutaneously on your keyboard.
  5. Click the "Process" tab. If you don't see there the PID you may click "View" and click "Select Columns" click on PID (Process Identifier) and click OK.
  6. Look for the PID of the program you just found from the command prompt. Click on that program and click "End Process".
Alternatively, you may use CurrPorts from Nirsoft to monitor the list of all currently opened TCP/IP and UDP ports on your computer.

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