New topic in General: 

Creating a Firewall - Stealth port

jclevien - Wed Apr 16, 2008 6:41 pm

<http://forums.realsoftware.com/viewtopic.php?t=21873>
                                                                                
                                                                                
Hello,

I am planning to create a firewall - router program to administer network 
connections.

One thing I cannot figure out, is: how can I convert TCP and UDP ports to be 
"stealth"? I mean, when you probe you firewall with Shields UP, if your 
firewall is OK, it shows all ports "stealthed" (not only blocked or 
disconnected).

Yes, I can "refuse" a connection by simply disconnecting it when it attempts to 
connect.
But I would like something more secure, is there a way to hide ports with 
REALbasic?

I am thinking about the ServerSocket class - you instantiate a ServerSocket per 
port you want to listen. But what happens if you don't return a socket in the 
AddSocket event? Will it work like the Stealth mode if you return Nil or the 
like?


Thank you for your answers.


Juan                                                                            
        
_________________
"Teaching should be such that what is offered is perceived as a valuable gift 
and not as a hard duty." -- Albert Einstein                                     
  
                                                                                
                                                                                
                                                                                
                                                                                
                                        




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