TZ Personal Firewall stops Hackers, Trojans, Spyware, Viruses, DoS attacks & data thieves & protects your PC from Internet-borne threats. Put a secure barrier between your hard drive & hackers, whether you use a dial -up, ISDN, DSL or cable connection. Meets your requirements for Internet security & Internet privacy. Shows the currently active connections & the details of these connections. You can shut off any unsafe connection.