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CHAPTER
1-1
Cisco VPN 5000 Client User Guide for Mac OS X
OL-1446-02
1
Introduction to the
Cisco VPN 5000 Client
The Cisco VPN 5000 Client connects a remote user to a corporate network.
The user connects to a local Internet Service Provider (ISP). Then, using the
VPN client, the user connects to the VPN concentrator Internet IP address to
create a secure tunnel for passing IP packets between the remote user and the
corporate network.
The VPN client encapsulates the data in a routable IP packet and encrypts it using
the IP Security (IPSec) Protocol.
The corporate server or concentrator authenticates the user, decrypts and
authenticates the IPSec packet, and translates the source address in the packets to
an address recognized on the corporate network. This address is used for all traffic
sent from the corporate network to the remote user for the duration of the
connection.
Features
The VPN client distinguishes between tunneled and nontunneled traffic and,
depending on your concentrator configuration, allows simultaneous access to the
corporate network and to Internet resources.