Vpnc Ike Security Parameters; Vpnc Ike Phase I Parameters - NETGEAR ProSafe FVS124G Reference Manual

Reference Manual for the ProSafe VPN Firewall 25 with 4 Gigabit LAN and Dual WAN Ports
2. IKE Phase I.
The two parties negotiate the encryption and authentication algorithms to use in the IKE
a.
SAs.
The two parties authenticate each other using a predetermined mechanism, such as
b.
preshared keys or digital certificates.
A shared master key is generated by the Diffie-Hellman Public key algorithm within the
c.
IKE framework for the two parties. The master key is also used in the second phase to
derive IPSec keys for the SAs.
3. IKE Phase II.
The two parties negotiate the encryption and authentication algorithms to use in the IPSec
a.
SAs.
The master key is used to derive the IPSec keys for the SAs. Once the SA keys are created
b.
and exchanged, the IPSec SAs are ready to protect user data between the two VPN
gateways.
4. Data transfer. Data is transferred between IPSec peers based on the IPSec parameters and
keys stored in the SA database.
5. IPSec tunnel termination. IPSec SAs terminate through deletion or by timing out.

VPNC IKE Security Parameters

It is important to remember that both gateways must have the identical parameters set for the
process to work correctly. The settings in these TechNote examples follow the examples given for
Scenario 1 of the VPN Consortium.

VPNC IKE Phase I Parameters

The IKE Phase 1 parameters used:
• Main mode
• TripleDES
• SHA-1
• MODP group 1
• pre-shared secret of "hr5xb84l6aa9r6"
• SA lifetime of 28800 seconds (eight hours)
D-10
202-10085-01, March 2005
Virtual Private Networking