Page 136 SONICWALL VPN
IKE Configuration between Two SonicWALLs
An alternative to
Manual Key
configuration is
Internet Key Exchange (IKE)
. IKE
transparently negotiates encryption and authentication keys. The two SonicWALL
appliances authenticate the IKE VPN session by matching preshared keys and IP
addresses or Unique Firewall Identifiers.
To create an IKE Security Association, click
VPN
on the left side of the browser
window, and then click the
Configure
tab at the top of the window.
1. Select
IKE using pre-shared secret
from the
IPSec Keying Mode
menu.
2. Select
-Add New SA-
from the
Security Association
menu.
3. Enter a descriptive name for the
Security Association
, such as "Palo Alto Office"
or "NY Headquarters", in the
Name
field.
4. Enter the IP address of the remote SonicWALL in the
IPSec Gateway Address
field. This address must be valid, and should be the NAT Public IP Address if the
remote SonicWALL uses Network Address Translation (NAT).
Note
: If the remote SonicWALL has a dynamic IP address, enter "0.0.0.0" in the
IPSec
Gateway Address
field. The remote SonicWALL initiates IKE negotiation in
Aggressive Mode because it has a dynamic IP address, and authenticates using the SA
Names and Unique Firewall Identifiers rather than the IP addresses. Therefore, the SA
Names for both SonicWALLs must match the opposite SonicWALLs' Unique Firewall
Identifiers. This requirement adds another layer of authentication to maximize security.
integrated_manual.book Page 136 Wednesday, June 13, 2001 6:21 PM