AirLive WN-300ARM-VPN - Manual (Page 129)

AirLive WN-300ARM-VPN User’s Manual 127
When using IKE, there are 2 phases to creating the VPN tunnel:
 Phase I is the negotiation and establishment up of the IKE connection.
 Phase II is the negotiation and establishment up of the IPsec connection.
Because the IKE and IPsec connections are separate, they have different SAs (security associations).
Policies
VPN configuration settings are stored in Policies.
Note that different vendors use different terms. Generally, the terms "VPN Policy", "IPSec Policy", and "IPSec
Proposal" have the same meaning. However, some vendors separate IKE Policies (Phase 1 parameters) from
IPSec Policies (Phase 2 parameters).
For the WN-300ARM-VPN; each VPN policy contains both Phase 1 and Phase 2 parameters (if IKE is used).
Each policy defines:
 The address of the remote VPN endpoint
 The traffic which is allowed to use the VPN connection.
 The parameters (settings) for the IPsec SA (Security Association)
 If IKE is used, the parameters (settings) for the IKE SA (Security Association)
Generally, you will need at least one (1) VPN Policy for each remote site for which you wish to establish VPN
connections.
It is possible, and sometimes necessary, to have multiple Policies for the same remote site. However, you
should only Enable one (1) policy at a time.
VPN Configuration
The general rule is that each endpoint must have matching Policies, as follows:
VPN Endpoint
address
Each VPN endpoint must be configured to initiate or accept connections
to the remote VPN client or Gateway.
Usually, this requires having a fixed Internet IP address. However, it is
possible for a VPN Gateway to accept incoming connections from a
remote client where the client's IP address is not known in advance.
Local & Remote
LAN definition
This determines which outgoing traffic will cause a VPN connection to be
established, and which incoming traffic will be accepted. Each endpoint
must be configured to pass and accept the desired traffic from the remote
endpoint.
If connecting 2 LANs, this requires that:
 Each endpoint must be aware of the IP addresses used on the other