Firewall Theory

The most difficult part of implementing a personal firewall is knowing what to block. The simplest answer is that you should block all unsolicited incoming traffic. This means that unless you are browsing a Web site or making a purchase over an SSL-enabled Web site, you should block incoming traffic you have not initiated.

We have already discussed lots about the Firewall , lets discuss what are Firewall Appliances .Small hardware appliances (devices that are separate from your computer) that you can connect and configure are available on the market, although they're not as popular with home users as software products are. Appliances enable remote management of small remote offices or home offices and are used to protect several computers. Setting up hardware appliances is easier than setting up software products, but hardware appliances tend to be more costly.