PC flank fail test

The results of Stealth Test

We have sent following packets to TCP:1 port of your machine:

* TCP ping packet
* TCP NULL packet
* TCP FIN packet
* TCP XMAS packet
* UDP packet 

Here is the description of possible results on each sent packet:
“Stealthed” - Means that your system (firewall) has successfuly passed the test by not responding to the packet we have sent to it.
“Non-stealthed” - Means that your system (firewall) responded to the packet we have sent to it. What is more important, is that it also means that your computer is visible to others on the Internet that can be potentially dangerous.

Packet' type 		Status 	
[b]TCP "ping" 	  	non-stealthed 	[/b]
TCP NULL 	  	stealthed 	
TCP FIN 	  	stealthed 	
TCP XMAS 	  	stealthed 	
UDP 	  	stealthed

¿alguna regla para corregir el fallo?