Shoutbox

Hi guys,
  came across this article from www.mess.be

  #3 The IP-Scan Method

  Contributed by inspiron2002

  1) Find the IP of the suspected blocker
  2) Scan the IP for the MSN PORT (1863)
  3) If there's none, the person is disconnected from the Internet.

  i was wondering is this method full proof, and if it is, how do i use it?

Thanks in advance


 

You need to google for a port scanner, but this may not work as:

1. How do you find the IP of your suspected blocker?
2. If the suspected blocker is behind or using a firewall, router...etc, this isn't likely to work.

Maybe you could buy "Hacking for Dummies April 2004" I'm reading it right now, and talks about port scanning, and as Mnjul said, it won't work on many many cases, because many of us are behind a router, or a DSL NAT. (In which my IP address is not public)

quote:

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Originally posted by saintgtril
2) Scan the IP for the MSN PORT (1863)

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This won't work, and I'll tell you why: 1863 is the server port.

In a bit more detail:
When a client makes a connection to the server, the OS hands it a random port above 1023. The client uses this random port to initiate a connection to the remote server on 1863.

I just did a 'netstat -o' on the command line, and Messenger is using two local ports: 1827 and 3609. 1827 is the Messenger connection, and 3609 is an HTTP connection.

Port numbers are defined for incoming connections only, hence the name given to the first 1024 ports: the service range. Port 1024 up is the client range.

As with all computery things, counting starts from zero.