Remote-access VPNs can support the needs of telecommuters,
mobile users, and extranet consumer-to-business traf?¬?c. Remote-access VPNs connect
individual hosts that must access their company network securely over the Internet.
Figure 8-3 shows an example of a remote-access VPN.
In the past, corporations supported remote users by using dial-in networks and ISDN. With
the advent of VPNs, a mobile user simply needs access to the Internet to communicate with
the central of?¬?ce. In the case of telecommuters, their Internet connectivity is typically a
broadband, DSL, or cable connection.
In a remote-access VPN, each host typically has Cisco VPN Client software. Whenever the
host tries to send traf?¬?c, the Cisco VPN Client software encapsulates and encrypts that
traf?¬?c before sending it over the Internet to the VPN gateway at the edge of the target
network. Upon receipt, the VPN gateway behaves as it does for site-to-site VPNs.
Remote Site
DSL Cable
Intranet
Extranet
Business-to-Business
Central Site
Internet
Router
or
or
POP
Introducing VPN Solutions 301
Figure 8-3 Remote-Access VPN
When you are deploying VPNs for teleworkers and small branch of?¬?ces, the ease of
deployment is increasingly important.
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