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ok.this discussion gives me lot of usefull information .ok now i move forther with this information
thank u very much

ok. i changed the port its working fine .but if i want to scan total ports(using loop) its taking too much time.
is there any alternative to scan ports fastly and display the hacker ipaddress....

thank u very much.when i executed the code by changing the port to 5222 it giving the exception but i am not getting
the ipaddress .i tested this code in lan to find my friends ipaddress.
...

the above code is scanning the ports.and displaying which port is used and which port is in unused.
its displaying the output port in use &not in use at the same number.
[port in use:80
port not...

here is mycode



import java.net.*;

public class PortScannerApp

{

thank youy very much for the replay.i written a program that looks over the opened ports .but the proble is i am not able to get the incoming ipaddress from the port.

hi all,
how to find the ipaddress of hackers who enter through open ports to pc. is it possible with the help
of java.net package.please help me. i am new to java.if possible how can i move...