ABSTRACT
In the past decade, the problem of establishing and control-
ling remote access to corporate networks has become one of
the most difficult issues facing network administrators and
information security professionals. As information-based
businesses become a larger and larger fraction of the global
economy, the nature of “business” itself changes. “Work”
used to take place in a well-defined location-such as a
factory, an office, or a store-atwell-defined times, between
relatively organized hierarchies of employees. But now,
“work” happens everywhere: all over the world, around
the clock, between employees, consultants, vendors, and
customer representatives. An employee can be productive
workingwith a personal computer and amodem in his living
room, without an assembly line, a filing cabinet, or a man-
ager in sight.
