Well honestly i had some trouble understanding what you said but i think i have the jist of it. You want to know how you can secure your system right? Well there is no way to make your computer totally secure, unless you have it turned off and unplugged. Things that can help increase security on your computer are software firewalls, hardware firewalls, virus scanner, and a good configuration of those. As well as having security updates installed. Firewalls that filter out some information that is sent and recived. They close ports, monitor traffic, and more. There is a software firewall built into windows XP if you have that. Hardware firewalls are hardware such as modems, and routers that have certain filters that you can set.
Norton Personal Firewall 2004 is a pretty good software firewall. And if you want to make sure you have you internet connection firewall enabled(for Windows XP) Go to start, settings, network connections, right click on the connection you use to connect to the internet, go to properties, go to the advanced tab, and click on the check box.
Some routers with filters built in:
Linksys BEFSR41 Dlink 604 There are also some modems that contain filters in which case you would have to find the specific way to access the configuration for that.
Security testing is also another way to identify problems with your configuration so that you may fix them.
Some security testing tools:
Shields Up Symantec Security Dsl reports.com Remember there is no way to be totally secure unless you have your computer turned off, and unpluged.