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Chapter 14 IPSec VPN
ZyWALL 2WG User’s Guide
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14.3 IKE SA Setup
This section provides more details about IKE SAs.
14.3.1 IKE SA Proposal
The IKE SA proposal is used to identify the encryption algorithm, authentication algorithm,
and Diffie-Hellman (DH) key group that the ZyWALL and remote IPSec router use in the IKE
SA. In main mode, this is done in steps 1 and 2, as illustrated below.
Figure 194 IKE SA: Main Negotiation Mode, Steps 1 - 2: IKE SA Proposal
The ZyWALL sends one or more proposals to the remote IPSec router. (In some devices, you
can set up only one proposal.) Each proposal consists of an encryption algorithm,
authentication algorithm, and DH key group that the ZyWALL wants to use in the IKE SA.
The remote IPSec router selects an acceptable proposal and sends the accepted proposal back
to the ZyWALL. If the remote IPSec router rejects all of the proposals (for example, if the
VPN tunnel is not configured correctly), the ZyWALL and remote IPSec router cannot
establish an IKE SA.
Click this icon to display a screen in which you can change the settings of a
gateway or network policy.
Click this icon to delete a gateway or network policy. When you delete a
gateway, the ZyWALL automatically moves the associated network policy(ies)
to the recycle bin. When you delete a network policy, it is just deleted.
Click this icon to establish a VPN connection to a remote network.
Click this icon to drop a VPN connection to a remote network.
Y/N This field displays whether a network policy is turned on (Y) or not (N). Click
the letter to change it to the other state (click Y to change it to N or N to
change it to Y).
Recycle Bin The recycle bin appears when you have any network policies that are not
associated to a gateway policy.
When you delete a gateway, the ZyWALL automatically moves the associated
network policy(ies) to the recycle bin.
You can also manually move a network policy that you do not need (but may
want to use again later) to the recycle bin. Click the network policy’s move or
edit icon and set it’s Gateway Policy to Recycle Bin.
Table 84 SECURITY > VPN > VPN Rules (IKE) (continued)
LABEL DESCRIPTION