ABSTRACT
Personal firewalls are often associated with (and were ori-
ginally designed for) home PCs connected to “always-on”
broadband Internet connections. Indeed, the term personal
firewall is itself a vestige of the product’s history: originally
distinguished from enterprise firewalls, personal firewalls
were initially viewed as a way to protect home PCs.[1] Over
time, it was recognized that personal firewalls had other
uses. The security community began to talk about using
personal firewalls to protect notebooks that connect to the
enterprise LAN via the Internet and eventually protecting
notebooks that physically reside on the enterprise LAN.
