Performing a TCP Scan

The TCP scan examines the 1,024 ports that are mainly reserved for TCP services, such as instant messaging services, to see if these ports are open to communication. Open ports can indicate a dangerous security hole that can be exploited by malicious hackers.

It scans ports on your computer that are connected to devices such as routers and proxies for users connecting to the Web site through such a device. The scan takes about 20 minutes to complete and is logged by the Personal Firewall as a scan event in the Security log.