Chapter 30 IPSec VPN
ZyWALL USG Series User’s Guide
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30.6 IPSec VPN Background Information
Here is some more detailed IPSec VPN background information.
IKE SA Overview
The IKE SA provides a secure connection between the Zyxel Device and remote IPSec router.
It takes several steps to establish an IKE SA. The negotiation mode determines how many. There are two
negotiation modes--main mode and aggressive mode. Main mode provides better security, while
aggressive mode is faster.
Add Click Add to bind a configured VPN rule to a user or group. Only that user or group may then
retrieve the specified VPN rule settings.
If you click Add without selecting an entry in advance then the new entry appears as the first
entry. Entry order is important as the Zyxel Device searches entries in the order listed here to find
a match. After a match is found, the Zyxel Device stops searching. If you want to add an entry
as number three for example, then first select entry 2 and click Add. To reorder an entry, use
Move.
Edit Select an existing entry and click Edit to change its settings.
Remove To remove an entry, select it and click Remove. The Zyxel Device confirms you want to remove it
before doing so.
Activate To turn on an entry, select it and click Activate. Make sure that Enable Configuration Provisioning
is also selected.
Inactivate To turn off an entry, select it and click Inactivate.
Move Use Move to reorder a selected entry. Select an entry, click Move, type the number where the
entry should be moved, press <ENTER>, then click Apply.
Status This icon shows if the entry is active (yellow) or not (gray). VPN rule settings can only be retrieved
when the entry is activated (and Enable Configuration Provisioning is also selected).
Priority Priority shows the order of the entry in the list. Entry order is important as the Zyxel Device
searches entries in the order listed here to find a match. After a match is found the Zyxel Device
stops searching.
VPN
Connection
This field shows all configured VPN rules that match the rule criteria for the
Zyxel Device IPSec
VPN client. Select a rule to bind to the associated user or group.
Allowed User Select which user or group of users is allowed to retrieve the associated VPN rule settings using
the Zyxel Device
IPSec VPN client. A user may belong to a number of groups. If entries are
configured for different groups, the Zyxel Device will allow VPN rule setting retrieval based on the
first match found.
Users of type admin or limited-admin are not allowed.
Type This field shows how traffic is tunneled from the Zyxel Device to the Zyxel VPN client:
• 6in4 (tunnel IPv6 traffic from the Zyxel Device to the Zyxel client in an IPv4 network);
• 4in6 (tunnel IPv4 traffic from the Zyxel Device to the Zyxel VPN client in an IPv6 network);
• 4in4 (tunnel IPv4 traffic from the Zyxel Device to the Zyxel VPN client in an IPv4 network).
Apply Click Apply to save your changes back to the Zyxel Device.
Reset Click Reset to return the screen to its last-saved settings.
Table 226 Configuration > VPN > IPSec VPN > Configuration Provisioning (continued)
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