
11 Policy Management
11- 2
VPN 3002 Hardware Client User Guide
VPN 3000 Series Concentrator settings required for PAT
For the VPN 3002 to use PAT, these are the requirements for the central-site Concentrator.
1 The Concentrator at the central site must be running Software version 3.x or later.
2 Address assignment must be enabled, by whatever method you choose to assign addresses (e.g.,
DHCP, address pools, per user, or client-specified). If the Concentrator uses address pools for address
assignment, make sure to configure the address pools your network requires. See Chapter 6, Address
Management, in the VPN 3000 Concentrator Series User Guide.
3 Configure a Group to which you assign this VPN 3002. This includes assigning a
Group Name and
Password. See Chapter 14, User Management, in the VPN 3000 Concentrator Series User Guide.
4 Configure one or more Users for the group, including
User Names and Passwords.
Network Extension mode
Network Extension mode allows the VPN 3002 to present a full, routable network to the tunneled
network. IPSec encapsulates all traffic from the VPN 3002 private network to networks behind the
central-site Concentrator. PAT does not apply. Therefore, devices behind the Concentrator have direct
access to devices on the VPN 3002 private network via the tunnel, and only over the tunnel, and vice
versa. Either side can initiate data exchange.
In this mode, the Concentrator does not assign an IP address for tunneled traffic (as it does in Client/PAT
mode). The tunnel is terminated with the VPN 3002 private IP address (i.e., the assigned IP address). To
use Network Extension Mode, you must configure an IP address other than the default of 192.168.10.1
and disable PAT.
Network Extension mode with split tunneling
You assign the VPN 3002 to a Group on the central-site Concentrator. If you enable split tunneling for
that group, IPSec operates on all traffic that travels through the VPN 3002 to networks within the
network list behind the central-site Concentrator, just as described above. PAT does not apply.
Traffic from the VPN 3002 to any other destination than those within the Concentrator’s network list
travels in the clear without applying IPSec. NAT translates the network addresses of the devices on the
VPN 3002 private network to the address of the VPN 3002 Public interface. Thus the network and
addresses on the private side of the VPN 3002 are accessible via the tunnel, but are protected from the
Internet, i.e., they cannot be accessed directly.
VPN 3000 Series Concentrator settings required for Network Extension mode
For the VPN 3002 to use Network Extension mode, these are the requirements for the central-site
Concentrator.
1 The Concentrator at the central site must be running Software version 3.x or later.
2 Configure a Group to which you assign this VPN 3002. This includes assigning a
Group Name and
Password. See Chapter 14, User Management, in the VPN 3000 Concentrator Series User Guide.
3 Configure one or more Users for the group, including
User Names and Passwords.
4 Configure either a default gateway or a static route to the VPN 3002 private network. See Chapter 8,
IP Routing in the VPN 3000 Concentrator Series User Guide.
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