Configuring Vpn Policies - NETGEAR FVX538v2 - ProSafe VPN Firewall Dual WAN Reference Manual

ProSafe VPN Firewall 200 FVX538 Reference Manual
• Auth. Authentication Algorithm used for the IKE SA. The default setting using the VPN
Wizard is SHA1. (This setting must match the remote VPN.)
• DH. Diffie-Hellman Group. The Diffie-Hellman algorithm is used when exchanging keys. The
DH Group sets the number of bits. The VPN Wizard default setting is Group 2. (This setting
must match the remote VPN.)
• Enable Dead Peer Detection: Dead Peer Detection is used to detect whether the peer is alive
or not. If the peer is detected as dead, the IPSec and IKE Security Association are deleted.
To gain a more complete understanding of the encryption, authentication and DH algorithm
technologies, see Appendix E, "Related

Configuring VPN Policies

You can create two types of VPN policies. When using the VPN Wizard to create a VPN policy,
only the Auto method is available.
• Manual. All settings (including the keys) for the VPN tunnel are manually entered at each end
(both VPN Endpoints). No third-party server or organization is involved.
• Auto. Some parameters for the VPN tunnel are generated automatically by using the IKE
(Internet Key Exchange) protocol to perform negotiations between the two VPN Endpoints
(the Local ID Endpoint and the Remote ID Endpoint).
In addition, a CA (Certificate Authority) can also be used to perform authentication (see
"Managing Certificates" on page
from the CA. For each certificate, there is both a public key and a private key. The public key is
freely distributed, and is used by any sender to encrypt data intended for the receiver (the key
owner). The receiver then uses its private key to decrypt the data (without the private key,
decryption is impossible). The use of certificates for authentication reduces the amount of data
entry required on each VPN endpoint.
The VPN Policies Screen
The VPN Policies screen (see
either Auto or Manual—and to manage the VPN policies already created. You can edit policies,
enable or disable policies, or delete them entirely. The rules for VPN policy use are:
1. Traffic covered by a policy will automatically be sent via a VPN tunnel.
2. When traffic is covered by two or more policies, the first matching policy will be used. (In this
situation, the order of the policies is important. However, if you have only one policy for each
remote VPN Endpoint, then the policy order is not important.)
3. The VPN tunnel is created according to the parameters in the SA (Security Association).
5-18
Documents" for a link to the NETGEAR website.
5-19). To use a CA, each VPN gateway must have a certificate
Figure 5-9 on page 5-8) allows you to add additional policies—
v1.0, January 2010
Virtual Private Networking