Sunday, May 13, 2012

How to check your open Ports

In Command prompt type netstat -a  you will get below result

 Proto  Local Address          Foreign Address        State
 13.72.128.111:51572   maa03s17-in-f2:http    ESTABLISHED

Proto: Shows which protocol it is (TCP or UDP)
Local address : this is your computer IP address you can see a number also in the above 51572. This is the port number is used by your computer.
 in this

0 - 1023 = This ports are used by "Services"
1024 - 49151 = This ports are used by "Network" ect Your Internet Browser and E-Mail clients.
49152 - 65535 = This ports are used by private users they are rarly used so this may indicate that you are infected with something.

Foreign Address: This is the Remote computer and the port is by default ftp port number is 21(port number for FTP).

State:  Shows is that computer connected to you or not.  its may ESTABLISHED / LISTENING / TIME_WAIT.

If you want to check your external IP(your Public IP) address and detect open ports on your connection go to 
http://www.yougetsignal.com/tools/open-ports/




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