Make backup copies of system files and store them in a safe place away from the computer.
Stealth Test
With the help of the Stealth test you can determine if your computer is visible to the others on the Internet. You can also use this test to determine if your firewall is successful in making ports of your system stealthed.
To determine if your system is visible to the other on the Internet (or your firewall stealthes your system) we will send the following packets to TCP:1 port of your machine:
TCP ping packet Description: An uniquely configured TCP packet with the ACK flag set to a probable port number
TCP NULL packet Description: An uniquely configured TCP packet that contain a sequence number but no flags
TCP FIN packet Description: The TCP FIN scanning is able to pass undetected through most personal firewalls, packet filters, and scan detection programs. The scan utilizes TCP packet with the FIN flag set to a probable port number.
TCP XMAS packet Description: The TCP packet with the URG, PUSH(PSH) and FIN flags set to a probable port number.
UDP packet Description: An uniquely configured UDP packet with empty datagram.
Each packet represents various scanning techniques (i.e. TCP NULL packet represents TCP NULL scanning technique). Most of the techniques are widely used by the hackers. If your system (or firewall) sends any response on any of the packets, it will mean that system is visible (non-stealthed) to the other on the Internet.
In the results of the test you will see the status(stealthed/non-stealthed) of each sent packet so you can determine what technique has tricked your system (firewall).
The test begins when you click on "Start Test".
ATTENTION!
By clicking the button "Start Test" you confirm your consent of the following statements:
Your computer will be scanned and checked by our scanner;
The results of your test will remain confidential and will not be given to any third party;
The test does not give a sound basis for legal claims of irreversible consequences to your computer;
Stealth Test
