VPN use
has proliferated as more and more users have gained quick and easy access to the Internet
from practically anywhere. The best part about VPN technology is that all you need
from the corporate network is a relatively fast Internet connection that can handle the
load of connections generated by the remote users.
Dial-Up Networking
Dial-up networking (DUN) is one of the most traditional methods for providing remote
access. It uses modems to connect directly to your corporate private network over telephone
lines. DUN has the advantage of providing fairly secure end-to-end connections
between a remote host and your private network. It is also easily accessible since you can
Figure 11-25. Adding a static route using the RRAS management console
382 Microsoft Windows Server 2008 Administration
connect from wherever you want as long as you can get to a phone line. The problem is
the relatively slow speed of the modem connection, which can be overcome to a certain
extent using a process called multilinking, where connections across multiple phone or
ISDN lines can be virtually grouped together so they act as a single larger data pipe.
DUN is also costly to manage since you have to provide and pay for multiple lines to
allow these connections to be established. Naturally, the more users you have the more
lines you need from your phone provider. Your users also shoulder some of the cost since
they are charged by their phone company whenever they dial out.
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