I took a look at five major firewalls on the market today ... simply to give Microsoft's own ISA Server something to do in an enterprise setting. The protection offered by Microsoft Windows ...

Stateful firewalls keep track of this context, monitoring the entire flow of communication — where packets are coming from, where they are going, and what type of traffic is being relayed.

Although they may sound less restrictive, stateless firewalls are incredibly useful for securing home and business networks. They use ACLs (Access Control Lists) to determine which traffic to ...

Personal firewalls are available from numerous security vendors, and Windows XP includes its own (see Windows Firewall). For home and small business networks, a router with a built-in firewall is ...