The device comes
in either a single-port or eight-port switch version. The VPN 3002 Hardware Client
replaces traditional Cisco VPN Client applications on individual SOHO computers.
?– Cisco VPN Software Client: Software that is loaded on an individual's PC or laptop.
The Cisco VPN Client allows organizations to establish end-to-end, encrypted VPN
tunnels for secure connectivity for mobile employees or teleworkers. The Cisco Easy
VPN feature allows the Cisco VPN Client to receive security policies from the central
site VPN device (Cisco Easy VPN Server) when a VPN tunnel connection is made,
minimizing con?¬?guration requirements at the remote location.
Figure 8-8 shows an example of the three clients used to connect to a Cisco VPN solution.
Figure 8-8 VPN Clients
Introducing IPsec
IPsec acts at the network layer, protecting and authenticating IP packets between
participating IPsec devices (peers). IPsec is not bound to any speci?¬?c encryption,
authentication, or security algorithms or keying technology. IPsec is a framework of open
standards. Figure 8-9 shows how IPsec can be used with different customers and devices to
connect.
Internet
Certicom PDA IPsec
VPN Client
Cisco VPN
Software Client
Cisco
Hardware
Client
(Legacy)
Small Office
308 Chapter 8: Extending the Network into the WAN
Figure 8-9 IPsec Flexibility
By not binding IPsec to speci?¬?c algorithms, IPsec allows newer and better algorithms to be
implemented without patching the existing IPsec standards.
Pages:
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457